{"id":2934,"date":"2024-11-13T21:52:54","date_gmt":"2024-11-13T14:52:54","guid":{"rendered":"https:\/\/fstack.io.vn\/?p=2934"},"modified":"2024-11-13T22:39:27","modified_gmt":"2024-11-13T15:39:27","slug":"array-va-cach-lam-viec-voi-no-trong-javascript","status":"publish","type":"post","link":"https:\/\/fstack.io.vn\/blog\/array-va-cach-lam-viec-voi-no-trong-javascript\/","title":{"rendered":"Array (m\u1ea3ng) l\u00e0 g\u00ec ? 1 s\u1ed1 c\u00e1ch l\u00e0m vi\u1ec7c v\u1edbi m\u1ea3ng trong JavaScript"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"2934\" class=\"elementor elementor-2934\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-641ab7b e-flex e-con-boxed e-con e-parent\" data-id=\"641ab7b\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c063667 elementor-widget elementor-widget-text-editor\" data-id=\"c063667\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>M\u1ea3ng l\u00e0 m\u1ed9t ki\u1ec3u d\u1eef li\u1ec7u quan tr\u1ecdng trong <a href=\"https:\/\/fstack.io.vn\/blog\/mot-so-cau-hoi-phong-van-javascript-tu-co-ban-den-nang-cao\/\">JavaScript<\/a>, cho ph\u00e9p l\u01b0u tr\u1eef v\u00e0 qu\u1ea3n l\u00fd m\u1ed9t t\u1eadp h\u1ee3p c\u00e1c gi\u00e1 tr\u1ecb theo th\u1ee9 t\u1ef1. B\u00e0i vi\u1ebft n\u00e0y t\u00f4i s\u1ebd h\u01b0\u1edbng d\u1eabn b\u1ea1n t\u1eeb c\u00e1ch t\u1ea1o m\u1ea3ng, truy c\u1eadp ph\u1ea7n t\u1eed \u0111\u1ebfn c\u00e1c ph\u01b0\u01a1ng th\u1ee9c thao t\u00e1c tr\u00ean m\u1ea3ng.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6754f04 elementor-widget elementor-widget-heading\" data-id=\"6754f04\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Danh m\u1ee5c b\u00e0i vi\u1ebft<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/fstack.io.vn\/blog\/array-va-cach-lam-viec-voi-no-trong-javascript\/#1_Khoi_Tao_Mang_trong_JavaScript\" >1. Kh\u1edfi T\u1ea1o M\u1ea3ng trong JavaScript<\/a><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/fstack.io.vn\/blog\/array-va-cach-lam-viec-voi-no-trong-javascript\/#Cach_tao_mang_co_ban\" >C\u00e1ch t\u1ea1o m\u1ea3ng c\u01a1 b\u1ea3n<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/fstack.io.vn\/blog\/array-va-cach-lam-viec-voi-no-trong-javascript\/#JavaScript_cho_phep_tao_mang_mot_cach_don_gian_bang_dau_ngoac_vuong_Mang_co_the_chua_bat_ky_loai_du_lieu_nao_bao_gom_ca_chuoi_so_va_cac_doi_tuong\" >JavaScript cho ph\u00e9p t\u1ea1o m\u1ea3ng m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n b\u1eb1ng d\u1ea5u ngo\u1eb7c vu\u00f4ng []. M\u1ea3ng c\u00f3 th\u1ec3 ch\u1ee9a b\u1ea5t k\u1ef3 lo\u1ea1i d\u1eef li\u1ec7u n\u00e0o, bao g\u1ed3m c\u1ea3 chu\u1ed7i, s\u1ed1, v\u00e0 c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng<\/a><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/fstack.io.vn\/blog\/array-va-cach-lam-viec-voi-no-trong-javascript\/#Tao_mang_voi_constructor_Array\" >T\u1ea1o m\u1ea3ng v\u1edbi constructor Array<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/fstack.io.vn\/blog\/array-va-cach-lam-viec-voi-no-trong-javascript\/#2_Truy_Cap_va_Thay_Doi_Phan_Tu_Cua_Mang\" >2. Truy C\u1eadp v\u00e0 Thay \u0110\u1ed5i Ph\u1ea7n T\u1eed C\u1ee7a M\u1ea3ng<\/a><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><ul class='ez-toc-list-level-6' ><li class='ez-toc-heading-level-6'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/fstack.io.vn\/blog\/array-va-cach-lam-viec-voi-no-trong-javascript\/#Thay_doi_phan_tu_cua_mang\" >Thay \u0111\u1ed5i ph\u1ea7n t\u1eed c\u1ee7a m\u1ea3ng<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/fstack.io.vn\/blog\/array-va-cach-lam-viec-voi-no-trong-javascript\/#3_Cac_Phuong_Thuc_Co_Ban_Cua_Mang\" >3. C\u00e1c Ph\u01b0\u01a1ng Th\u1ee9c C\u01a1 B\u1ea3n C\u1ee7a M\u1ea3ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/fstack.io.vn\/blog\/array-va-cach-lam-viec-voi-no-trong-javascript\/#4_Lap_Qua_Cac_Phan_Tu_Trong_Mang\" >4. L\u1eb7p Qua C\u00e1c Ph\u1ea7n T\u1eed Trong M\u1ea3ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/fstack.io.vn\/blog\/array-va-cach-lam-viec-voi-no-trong-javascript\/#5_Cac_Phuong_Thuc_Tim_Kiem_va_Loc\" >5. C\u00e1c Ph\u01b0\u01a1ng Th\u1ee9c T\u00ecm Ki\u1ebfm v\u00e0 L\u1ecdc<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/fstack.io.vn\/blog\/array-va-cach-lam-viec-voi-no-trong-javascript\/#6_Phan_Ra_va_Sao_Chep_Mang_voi_Spread_Syntax\" >6. Ph\u00e2n R\u00e3 v\u00e0 Sao Ch\u00e9p M\u1ea3ng v\u1edbi Spread Syntax<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/fstack.io.vn\/blog\/array-va-cach-lam-viec-voi-no-trong-javascript\/#7_Sort_va_Reverse_Mang\" >7. Sort v\u00e0 Reverse M\u1ea3ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/fstack.io.vn\/blog\/array-va-cach-lam-viec-voi-no-trong-javascript\/#8_Tong_Ket\" >8. T\u1ed5ng K\u1ebft<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"1_Khoi_Tao_Mang_trong_JavaScript\"><\/span>1. Kh\u1edfi T\u1ea1o M\u1ea3ng trong JavaScript<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-795409a elementor-widget elementor-widget-heading\" data-id=\"795409a\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h6 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"Cach_tao_mang_co_ban\"><\/span>C\u00e1ch t\u1ea1o m\u1ea3ng c\u01a1 b\u1ea3n<span class=\"ez-toc-section-end\"><\/span><\/h6>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-32ae3f2 elementor-widget elementor-widget-text-editor\" data-id=\"32ae3f2\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h3><span class=\"ez-toc-section\" id=\"JavaScript_cho_phep_tao_mang_mot_cach_don_gian_bang_dau_ngoac_vuong_Mang_co_the_chua_bat_ky_loai_du_lieu_nao_bao_gom_ca_chuoi_so_va_cac_doi_tuong\"><\/span><span style=\"font-family: var( --e-global-typography-text-font-family ), Sans-serif; font-style: var(--postx_preset_Body_and_Others_typo_font_style); letter-spacing: var(--postx_preset_Body_and_Others_typo_letter_spacing_lg, normal); text-transform: var(--postx_preset_Body_and_Others_typo_text_transform); text-align: var(--text-align); background-color: var(--postx_preset_base_1_color); color: var( --e-global-color-text ); font-weight: var( --e-global-typography-text-font-weight ); font-size: var(--postx_preset_body_typo_font_size_lg, initial);\">JavaScript cho ph\u00e9p t\u1ea1o m\u1ea3ng m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n b\u1eb1ng d\u1ea5u ngo\u1eb7c vu\u00f4ng <\/span><code style=\"font-style: var(--postx_preset_Body_and_Others_typo_font_style); letter-spacing: var(--postx_preset_Body_and_Others_typo_letter_spacing_lg, normal); text-transform: var(--postx_preset_Body_and_Others_typo_text_transform); text-align: var(--text-align); background-color: var(--postx_preset_base_1_color); color: var( --e-global-color-text ); font-weight: var( --e-global-typography-text-font-weight ); font-size: var(--postx_preset_body_typo_font_size_lg, initial);\">[]<\/code><span style=\"font-family: var( --e-global-typography-text-font-family ), Sans-serif; font-style: var(--postx_preset_Body_and_Others_typo_font_style); letter-spacing: var(--postx_preset_Body_and_Others_typo_letter_spacing_lg, normal); text-transform: var(--postx_preset_Body_and_Others_typo_text_transform); text-align: var(--text-align); background-color: var(--postx_preset_base_1_color); color: var( --e-global-color-text ); font-weight: var( --e-global-typography-text-font-weight ); font-size: var(--postx_preset_body_typo_font_size_lg, initial);\">. M\u1ea3ng c\u00f3 th\u1ec3 ch\u1ee9a b\u1ea5t k\u1ef3 lo\u1ea1i d\u1eef li\u1ec7u n\u00e0o, bao g\u1ed3m c\u1ea3 chu\u1ed7i, s\u1ed1, v\u00e0 c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9240b41 elementor-widget elementor-widget-code-highlight\" data-id=\"9240b41\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-javascript line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-javascript\">\n\t\t\t\t\t<xmp>const numbers = [1, 2, 3, 4, 5];\r\nconst mixedArray = ['Text', 10, { name: 'Alice' }];\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-16e24f4 elementor-widget elementor-widget-heading\" data-id=\"16e24f4\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h6 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"Tao_mang_voi_constructor_Array\"><\/span>T\u1ea1o m\u1ea3ng v\u1edbi constructor Array<span class=\"ez-toc-section-end\"><\/span><\/h6>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ee0ff42 elementor-widget elementor-widget-text-editor\" data-id=\"ee0ff42\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Ngo\u00e0i d\u1ea5u ngo\u1eb7c vu\u00f4ng, ta c\u00f3 th\u1ec3 d\u00f9ng <a href=\"https:\/\/fstack.io.vn\/blog\/constructor-ham-tao-trong-java-la-gi-mot-so-cach-khai-bao-constructor-trong-java\/\">constructor<\/a> Array:<code><\/code><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c16891b elementor-widget elementor-widget-code-highlight\" data-id=\"c16891b\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-javascript line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-javascript\">\n\t\t\t\t\t<xmp>const fruits = new Array('Apple', 'Banana', 'Orange');\r\nconsole.log(fruits); \/\/ [\"Apple\", \"Banana\", \"Orange\"]\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d3cc031 elementor-widget elementor-widget-heading\" data-id=\"d3cc031\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"2_Truy_Cap_va_Thay_Doi_Phan_Tu_Cua_Mang\"><\/span>2. Truy C\u1eadp v\u00e0 Thay \u0110\u1ed5i Ph\u1ea7n T\u1eed C\u1ee7a M\u1ea3ng<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-08f1d69 elementor-widget elementor-widget-text-editor\" data-id=\"08f1d69\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>\u0110\u1ec3 truy c\u1eadp ph\u1ea7n t\u1eed c\u1ee7a m\u1ea3ng, s\u1eed d\u1ee5ng ch\u1ec9 s\u1ed1 c\u1ee7a ph\u1ea7n t\u1eed. Ch\u1ec9 s\u1ed1 b\u1eaft \u0111\u1ea7u t\u1eeb 0.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ae380bb elementor-widget elementor-widget-code-highlight\" data-id=\"ae380bb\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-javascript line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-javascript\">\n\t\t\t\t\t<xmp>const fruits = ['Apple', 'Banana', 'Orange'];\r\nconsole.log(fruits[0]); \/\/ Apple\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-18cb1ce elementor-widget elementor-widget-heading\" data-id=\"18cb1ce\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h6 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"Thay_doi_phan_tu_cua_mang\"><\/span>Thay \u0111\u1ed5i ph\u1ea7n t\u1eed c\u1ee7a m\u1ea3ng<span class=\"ez-toc-section-end\"><\/span><\/h6>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-24c91aa elementor-widget elementor-widget-text-editor\" data-id=\"24c91aa\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>B\u1ea1n c\u00f3 th\u1ec3 g\u00e1n l\u1ea1i gi\u00e1 tr\u1ecb cho m\u1ed9t ph\u1ea7n t\u1eed:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-af8c247 elementor-widget elementor-widget-code-highlight\" data-id=\"af8c247\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-dark copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-javascript line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-javascript\">\n\t\t\t\t\t<xmp>fruits[1] = 'Grapes';\r\nconsole.log(fruits); \/\/ [\"Apple\", \"Grapes\", \"Orange\"]\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3b301a0 elementor-widget elementor-widget-heading\" data-id=\"3b301a0\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"3_Cac_Phuong_Thuc_Co_Ban_Cua_Mang\"><\/span>3. C\u00e1c Ph\u01b0\u01a1ng Th\u1ee9c C\u01a1 B\u1ea3n C\u1ee7a M\u1ea3ng<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-349eaec elementor-widget elementor-widget-text-editor\" data-id=\"349eaec\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>JavaScript cung c\u1ea5p nhi\u1ec1u ph\u01b0\u01a1ng th\u1ee9c m\u1ea1nh m\u1ebd \u0111\u1ec3 thao t\u00e1c v\u1edbi m\u1ea3ng.<\/p><p><b>Push()<\/b> &#8211; Th\u00eam ph\u1ea7n t\u1eed v\u00e0o cu\u1ed1i m\u1ea3ng\u00a0<\/p><p>Ph\u01b0\u01a1ng th\u1ee9c <code>push<\/code> th\u00eam m\u1ed9t ho\u1eb7c nhi\u1ec1u ph\u1ea7n t\u1eed v\u00e0o cu\u1ed1i m\u1ea3ng.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e9c5cc3 elementor-widget elementor-widget-code-highlight\" data-id=\"e9c5cc3\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-javascript line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-javascript\">\n\t\t\t\t\t<xmp>const animals = ['Dog', 'Cat'];\r\nanimals.push('Elephant');\r\nconsole.log(animals); \/\/ [\"Dog\", \"Cat\", \"Elephant\"]\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-29b932b elementor-widget elementor-widget-text-editor\" data-id=\"29b932b\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>pop()<\/strong> &#8211; X\u00f3a ph\u1ea7n t\u1eed cu\u1ed1i c\u00f9ng c\u1ee7a m\u1ea3ng<\/p><p>Ph\u01b0\u01a1ng th\u1ee9c <code>pop<\/code> s\u1ebd x\u00f3a ph\u1ea7n t\u1eed cu\u1ed1i c\u00f9ng v\u00e0 tr\u1ea3 v\u1ec1 ph\u1ea7n t\u1eed \u0111\u00f3<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-23a4845 elementor-widget elementor-widget-code-highlight\" data-id=\"23a4845\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-javascript line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-javascript\">\n\t\t\t\t\t<xmp>const colors = ['Red', 'Green', 'Blue'];\r\nconst lastColor = colors.pop();\r\nconsole.log(colors); \/\/ [\"Red\", \"Green\"]\r\nconsole.log(lastColor); \/\/ Blue\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-70500ba elementor-widget elementor-widget-text-editor\" data-id=\"70500ba\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>shift()<\/strong> v\u00e0 <strong>unshift()\u00a0<\/strong><\/p><p>shift() : X\u00f3a ph\u1ea7n t\u1eed \u0111\u1ea7u ti\u00ean c\u1ee7a m\u1ea3ng.<\/p><p>unshift() : Th\u00eam ph\u1ea7n t\u1eed v\u00e0o \u0111\u1ea7u m\u1ea3ng.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-571bf6e elementor-widget elementor-widget-code-highlight\" data-id=\"571bf6e\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-javascript line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-javascript\">\n\t\t\t\t\t<xmp>const cities = ['Hanoi', 'Saigon'];\r\ncities.unshift('Danang');\r\nconsole.log(cities); \/\/ [\"Danang\", \"Hanoi\", \"Saigon\"]\r\n\r\ncities.shift();\r\nconsole.log(cities); \/\/ [\"Hanoi\", \"Saigon\"]\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0c26d8b elementor-widget elementor-widget-heading\" data-id=\"0c26d8b\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"4_Lap_Qua_Cac_Phan_Tu_Trong_Mang\"><\/span>4. L\u1eb7p Qua C\u00e1c Ph\u1ea7n T\u1eed Trong M\u1ea3ng<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-aab2789 elementor-widget elementor-widget-text-editor\" data-id=\"aab2789\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>S\u1eed d\u1ee5ng c\u00e1c v\u00f2ng l\u1eb7p nh\u01b0 <code>for<\/code>, <code>forEach<\/code>, ho\u1eb7c <code>map<\/code> \u0111\u1ec3 l\u1eb7p qua c\u00e1c ph\u1ea7n t\u1eed c\u1ee7a m\u1ea3ng.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-939a34c elementor-widget elementor-widget-text-editor\" data-id=\"939a34c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><b>S\u1eed d\u1ee5ng for<\/b><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-15be59f elementor-widget elementor-widget-code-highlight\" data-id=\"15be59f\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-javascript line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-javascript\">\n\t\t\t\t\t<xmp>const numbers = [1, 2, 3];\r\nfor (let i = 0; i < numbers.length; i++) {\r\n  console.log(numbers[i]);\r\n}\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1e3c717 elementor-widget elementor-widget-text-editor\" data-id=\"1e3c717\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>S\u1eed d\u1ee5ng forEach<\/strong><\/p><p><code>forEach<\/code> th\u1ef1c hi\u1ec7n m\u1ed9t h\u00e0m callback v\u1edbi t\u1eebng ph\u1ea7n t\u1eed.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-40ebbb9 elementor-widget elementor-widget-code-highlight\" data-id=\"40ebbb9\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-javascript line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-javascript\">\n\t\t\t\t\t<xmp>numbers.forEach(num => console.log(num));\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-425756d elementor-widget elementor-widget-text-editor\" data-id=\"425756d\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><b>S\u1eed d\u1ee5ng map<\/b><\/p><p>map s\u1ebd tr\u1ea3 v\u1ec1 m\u1ed9t m\u1ea3ng m\u1edbi c\u00f3 \u0111\u1ed9 d\u00e0i (length) m\u1ea3ng m\u00e0 n\u00f3 map qua. V\u00e0 qua m\u1ed7i l\u1ea7n l\u1eb7p n\u00f3 return v\u1ec1 c\u00e1i g\u00ec th\u00ec c\u00e1c ph\u1ea7n t\u1eed t\u01b0\u01a1ng \u1ee9ng c\u1ee7a m\u1ea3ng m\u1edbi l\u00e0 c\u00e1i \u0111\u00f3.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-01d9110 elementor-widget elementor-widget-code-highlight\" data-id=\"01d9110\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-javascript line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-javascript\">\n\t\t\t\t\t<xmp>const doubledNumbers = numbers.map(num => num * 2);\r\nconsole.log(doubledNumbers); \/\/ [2, 4, 6]\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ad9be34 elementor-widget elementor-widget-heading\" data-id=\"ad9be34\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"5_Cac_Phuong_Thuc_Tim_Kiem_va_Loc\"><\/span>5. C\u00e1c Ph\u01b0\u01a1ng Th\u1ee9c T\u00ecm Ki\u1ebfm v\u00e0 L\u1ecdc<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b15153f elementor-widget elementor-widget-text-editor\" data-id=\"b15153f\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><b>find() &#8211;\u00a0 T\u00ecm ph\u1ea7n t\u1eed \u0111\u1ea7u ti\u00ean th\u1ecfa m\u00e3n \u0111i\u1ec1u ki\u1ec7n\u00a0<\/b><\/p><p><code>find<\/code> tr\u1ea3 v\u1ec1 ph\u1ea7n t\u1eed \u0111\u1ea7u ti\u00ean th\u1ecfa m\u00e3n \u0111i\u1ec1u ki\u1ec7n trong callback.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-dde79d5 elementor-widget elementor-widget-code-highlight\" data-id=\"dde79d5\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-javascript line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-javascript\">\n\t\t\t\t\t<xmp>const people = [{ name: 'Alice', age: 25 }, { name: 'Bob', age: 30 }];\r\nconst person = people.find(p => p.age === 30);\r\nconsole.log(person); \/\/ { name: \"Bob\", age: 30 }\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ada92f1 elementor-widget elementor-widget-text-editor\" data-id=\"ada92f1\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><b>filter() &#8211; L\u1ecdc c\u00e1c ph\u1ea7n t\u1eed th\u1ecfa m\u00e3n \u0111i\u1ec1u ki\u1ec7n<\/b><\/p><p><code>filter<\/code> tr\u1ea3 v\u1ec1 m\u1ed9t m\u1ea3ng m\u1edbi v\u1edbi c\u00e1c ph\u1ea7n t\u1eed th\u1ecfa m\u00e3n \u0111i\u1ec1u ki\u1ec7n<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2e60450 elementor-widget elementor-widget-code-highlight\" data-id=\"2e60450\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-javascript line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-javascript\">\n\t\t\t\t\t<xmp>const adults = people.filter(p => p.age >= 18);\r\nconsole.log(adults); \/\/ [{ name: \"Alice\", age: 25 }, { name: \"Bob\", age: 30 }]\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a4d2fb6 elementor-widget elementor-widget-heading\" data-id=\"a4d2fb6\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"6_Phan_Ra_va_Sao_Chep_Mang_voi_Spread_Syntax\"><\/span>6. Ph\u00e2n R\u00e3 v\u00e0 Sao Ch\u00e9p M\u1ea3ng v\u1edbi Spread Syntax<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cc798c8 elementor-widget elementor-widget-text-editor\" data-id=\"cc798c8\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><b><a href=\"https:\/\/fstack.io.vn\/blog\/10-the-meta-ma-ban-nen-biet-khi-lam-seo-website\/\">Sao<\/a> ch\u00e9p m\u1ea3ng<\/b><\/p><p><a href=\"https:\/\/fstack.io.vn\/blog\/destructuring-spread-syntax-rest-parameters-js\/\">Spread<\/a> syntax (<code>...<\/code>) cho ph\u00e9p sao ch\u00e9p m\u1ea3ng m\u00e0 kh\u00f4ng l\u00e0m thay \u0111\u1ed5i b\u1ea3n g\u1ed1c<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4dca21d elementor-widget elementor-widget-code-highlight\" data-id=\"4dca21d\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-javascript line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-javascript\">\n\t\t\t\t\t<xmp>const original = [1, 2, 3];\r\nconst copy = [...original];\r\ncopy.push(4);\r\nconsole.log(original); \/\/ [1, 2, 3]\r\nconsole.log(copy);     \/\/ [1, 2, 3, 4]\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8c0de15 elementor-widget elementor-widget-text-editor\" data-id=\"8c0de15\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><b>G\u1ed9p m\u1ea3ng<\/b><\/p><p>D\u00f9ng <code>...<\/code> \u0111\u1ec3 g\u1ed9p nhi\u1ec1u m\u1ea3ng.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f4cd83a elementor-widget elementor-widget-code-highlight\" data-id=\"f4cd83a\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-javascript line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-javascript\">\n\t\t\t\t\t<xmp>const arr1 = [1, 2];\r\nconst arr2 = [3, 4];\r\nconst merged = [...arr1, ...arr2];\r\nconsole.log(merged); \/\/ [1, 2, 3, 4]\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-42048d5 elementor-widget elementor-widget-heading\" data-id=\"42048d5\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"7_Sort_va_Reverse_Mang\"><\/span>7. Sort v\u00e0 Reverse M\u1ea3ng<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-aff23c7 elementor-widget elementor-widget-text-editor\" data-id=\"aff23c7\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><b>S\u1eafp x\u1ebfp m\u1ea3ng v\u1edbi sort()<\/b><\/p><p><code>sort()<\/code> s\u1eafp x\u1ebfp m\u1ea3ng theo th\u1ee9 t\u1ef1 t\u0103ng d\u1ea7n ho\u1eb7c theo h\u00e0m so s\u00e1nh t\u00f9y ch\u1ec9nh<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e5da466 elementor-widget elementor-widget-code-highlight\" data-id=\"e5da466\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-javascript line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-javascript\">\n\t\t\t\t\t<xmp>const scores = [10, 5, 8, 3];\r\nscores.sort((a, b) => a - b);\r\nconsole.log(scores); \/\/ [3, 5, 8, 10]\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b4ee746 elementor-widget elementor-widget-text-editor\" data-id=\"b4ee746\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><b>\u0110\u1ea3o ng\u01b0\u1ee3c m\u1ea3ng v\u1edbi reverse()<\/b><\/p><p><code>reverse()<\/code> \u0111\u1ea3o ng\u01b0\u1ee3c th\u1ee9 t\u1ef1 c\u00e1c ph\u1ea7n t\u1eed c\u1ee7a m\u1ea3ng<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ffa03af elementor-widget elementor-widget-code-highlight\" data-id=\"ffa03af\" data-element_type=\"widget\" data-widget_type=\"code-highlight.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"prismjs-okaidia copy-to-clipboard \">\n\t\t\t<pre data-line=\"\" class=\"highlight-height language-javascript line-numbers\">\n\t\t\t\t<code readonly=\"true\" class=\"language-javascript\">\n\t\t\t\t\t<xmp>scores.reverse();\r\nconsole.log(scores); \/\/ [10, 8, 5, 3]\r\n<\/xmp>\n\t\t\t\t<\/code>\n\t\t\t<\/pre>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f7cbec5 elementor-widget elementor-widget-heading\" data-id=\"f7cbec5\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"8_Tong_Ket\"><\/span>8. T\u1ed5ng K\u1ebft<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b836833 elementor-widget elementor-widget-text-editor\" data-id=\"b836833\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>M\u1ea3ng trong JavaScript mang l\u1ea1i s\u1ef1 linh ho\u1ea1t v\u00e0 \u0111a d\u1ea1ng cho vi\u1ec7c x\u1eed l\u00fd d\u1eef li\u1ec7u. C\u00e1c ph\u01b0\u01a1ng th\u1ee9c nh\u01b0 <b><code>push<\/code>, <code>pop<\/code>, <code>map<\/code>, <code>filter<\/code>,\u00a0<code>sort,...<\/code><\/b> gi\u00fap ch\u00fang ta thao t\u00e1c v\u1edbi m\u1ea3ng d\u1ec5 d\u00e0ng h\u01a1n v\u00e0 hi\u1ec7u qu\u1ea3 h\u01a1n. H\u00e3y th\u1ef1c h\u00e0nh \u0111\u1ec3 n\u1eafm v\u1eefng c\u00e1c k\u1ef9 thu\u1eadt n\u00e0y, v\u00ec \u0111\u00e2y l\u00e0 n\u1ec1n t\u1ea3ng quan tr\u1ecdng trong <a href=\"https:\/\/fstack.io.vn\/blog\/lap-trinh-la-gi-mot-so-dac-diem-cua-lap-trinh-ma-ban-nen-biet\/\">l\u1eadp tr\u00ecnh<\/a> JavaScript.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-126d19d elementor-widget elementor-widget-heading\" data-id=\"126d19d\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<span class=\"elementor-heading-title elementor-size-default\"><a href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Web\/JavaScript\/Reference\/Global_Objects\/Array\" rel=\"nofollow noopener\" target=\"_blank\">Click \u0111\u1ec3 xem th\u00eam chi ti\u1ebft<\/a><\/span>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6ec557e elementor-widget elementor-widget-text-editor\" data-id=\"6ec557e\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>\u1ede tr\u00ean l\u00e0 1 s\u1ed1 chia s\u1ebb v\u1ec1 ki\u1ebfn th\u1ee9c JavaScript c\u1ee7a m\u00ecnh, v\u00ec \u0111\u00e2y \u0111a ph\u1ea7n l\u00e0 ki\u1ebfn th\u1ee9c m\u00ecnh t\u1ef1 h\u1ecdc n\u00ean c\u00f3 th\u1ec3 b\u00e0i vi\u1ebft n\u00e0y c\u00f3 th\u1ec3 c\u00f3 nhi\u1ec1u ch\u1ed7 ch\u01b0a ch\u00ednh x\u00e1c v\u00e0 thi\u1ebfu s\u00f3t, mong m\u1ecdi ng\u01b0\u1eddi g\u00f3p \u00fd \u1edf d\u01b0\u1edbi ph\u1ea7n b\u00ecnh lu\u1eadn \u0111\u1ec3 b\u00e0i vi\u1ebft th\u00eam ho\u00e0n ch\u1ec9nh v\u00e0 x\u00e2y d\u1ef1ng m\u1ed9t c\u1ed9ng \u0111\u1ed3ng n\u01a1i m\u1ecdi ng\u01b0\u1eddi c\u00f3 th\u1ec3 chia s\u1ebb kinh nghi\u1ec7m\u00a0<a href=\"https:\/\/fstack.io.vn\/lap-trinh-la-gi-mot-so-dac-diem-cua-lap-trinh-ma-ban-nen-biet\/\">l\u1eadp tr\u00ecnh<\/a>\u00a0cho nhau\u00a0\ud83d\ude18.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>M\u1ea3ng l\u00e0 m\u1ed9t ki\u1ec3u d\u1eef li\u1ec7u quan tr\u1ecdng trong JavaScript, cho ph\u00e9p l\u01b0u tr\u1eef v\u00e0 qu\u1ea3n l\u00fd m\u1ed9t t\u1eadp h\u1ee3p c\u00e1c gi\u00e1 tr\u1ecb theo th\u1ee9 t\u1ef1. B\u00e0i vi\u1ebft n\u00e0y t\u00f4i s\u1ebd h\u01b0\u1edbng d\u1eabn b\u1ea1n t\u1eeb c\u00e1ch t\u1ea1o m\u1ea3ng, truy c\u1eadp ph\u1ea7n t\u1eed \u0111\u1ebfn c\u00e1c ph\u01b0\u01a1ng th\u1ee9c thao t\u00e1c tr\u00ean m\u1ea3ng. 1. Kh\u1edfi T\u1ea1o M\u1ea3ng trong [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":2935,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[73],"tags":[77,78],"class_list":["post-2934","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-javascript","tag-array","tag-mang"],"acf":[],"jetpack_featured_media_url":"https:\/\/fstack.io.vn\/blog\/wp-content\/uploads\/2024\/11\/array.webp","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/fstack.io.vn\/blog\/wp-json\/wp\/v2\/posts\/2934","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fstack.io.vn\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fstack.io.vn\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fstack.io.vn\/blog\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/fstack.io.vn\/blog\/wp-json\/wp\/v2\/comments?post=2934"}],"version-history":[{"count":5,"href":"https:\/\/fstack.io.vn\/blog\/wp-json\/wp\/v2\/posts\/2934\/revisions"}],"predecessor-version":[{"id":2942,"href":"https:\/\/fstack.io.vn\/blog\/wp-json\/wp\/v2\/posts\/2934\/revisions\/2942"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/fstack.io.vn\/blog\/wp-json\/wp\/v2\/media\/2935"}],"wp:attachment":[{"href":"https:\/\/fstack.io.vn\/blog\/wp-json\/wp\/v2\/media?parent=2934"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fstack.io.vn\/blog\/wp-json\/wp\/v2\/categories?post=2934"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fstack.io.vn\/blog\/wp-json\/wp\/v2\/tags?post=2934"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}