{"id":335,"date":"2024-12-18T23:57:04","date_gmt":"2024-12-18T15:57:04","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=335"},"modified":"2024-12-18T23:57:04","modified_gmt":"2024-12-18T15:57:04","slug":"javascript-%e6%95%b0%e7%bb%84%e6%96%b9%e6%b3%95%ef%bc%9a%e4%b8%80%e4%bb%bd%e4%b8%8d%e8%83%bd%e9%94%99%e8%bf%87%e7%9a%84%e5%ad%a6%e4%b9%a0%e6%96%87%e6%a1%a3","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2024\/12\/18\/javascript-%e6%95%b0%e7%bb%84%e6%96%b9%e6%b3%95%ef%bc%9a%e4%b8%80%e4%bb%bd%e4%b8%8d%e8%83%bd%e9%94%99%e8%bf%87%e7%9a%84%e5%ad%a6%e4%b9%a0%e6%96%87%e6%a1%a3\/","title":{"rendered":"JavaScript \u6570\u7ec4\u65b9\u6cd5\uff1a\u4e00\u4efd\u4e0d\u80fd\u9519\u8fc7\u7684\u5b66\u4e60\u6587\u6863"},"content":{"rendered":"\n
\n

JavaScript \u4e2d\u7684\u6570\u7ec4\u662f\u5b58\u50a8\u591a\u4e2a\u6570\u636e\u9879\u7684\u5bf9\u8c61\uff0c\u5e76\u4e14\u63d0\u4f9b\u4e86\u591a\u79cd\u65b9\u6cd5\u6765\u64cd\u4f5c\u8fd9\u4e9b\u6570\u636e\u3002\u4e0b\u9762\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u6570\u7ec4\u65b9\u6cd5\uff0c\u5b83\u4eec\u7684\u529f\u80fd\u3001\u8bed\u6cd5\u3001\u7528\u6cd5\u793a\u4f8b\u4ee5\u53ca\u6d4f\u89c8\u5668\u517c\u5bb9\u6027\u3002<\/p>\n<\/blockquote>\n\n\n\n

1. push()<\/code><\/strong><\/h4>\n\n\n\n
    \n
  • \u529f\u80fd<\/strong>\uff1a\u5728\u6570\u7ec4\u7684\u672b\u5c3e\u6dfb\u52a0\u4e00\u4e2a\u6216\u591a\u4e2a\u5143\u7d20\uff0c\u8fd4\u56de\u65b0\u7684\u6570\u7ec4\u957f\u5ea6\u3002<\/li>\n\n\n\n
  • \u8bed\u6cd5<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
      array.push(element1, element2, ..., elementN)<\/code><\/pre>\n\n\n\n
      \n
    • \u793a\u4f8b<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
        let arr = [1, 2, 3];\n  let newLength = arr.push(4, 5); \/\/ [1, 2, 3, 4, 5]\n  console.log(newLength); \/\/ 5<\/code><\/pre>\n\n\n\n
        \n
      • \u517c\u5bb9\u6027<\/strong>\uff1a\u6240\u6709\u4e3b\u6d41\u6d4f\u89c8\u5668\u90fd\u652f\u6301\u3002<\/li>\n<\/ul>\n\n\n\n
        2. pop()<\/code><\/strong><\/h4>\n\n\n\n
          \n
        • \u529f\u80fd<\/strong>\uff1a\u4ece\u6570\u7ec4\u7684\u672b\u5c3e\u5220\u9664\u4e00\u4e2a\u5143\u7d20\uff0c\u5e76\u8fd4\u56de\u8be5\u5143\u7d20\u3002<\/li>\n\n\n\n
        • \u8bed\u6cd5<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
            array.pop()<\/code><\/pre>\n\n\n\n
            \n
          • \u793a\u4f8b<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
              let arr = [1, 2, 3];\n  let lastElement = arr.pop(); \/\/ 3\n  console.log(arr); \/\/ [1, 2]<\/code><\/pre>\n\n\n\n
              \n
            • \u517c\u5bb9\u6027<\/strong>\uff1a\u6240\u6709\u4e3b\u6d41\u6d4f\u89c8\u5668\u90fd\u652f\u6301\u3002<\/li>\n<\/ul>\n\n\n\n
              3. shift()<\/code><\/strong><\/h4>\n\n\n\n
                \n
              • \u529f\u80fd<\/strong>\uff1a\u4ece\u6570\u7ec4\u7684\u5f00\u5934\u5220\u9664\u4e00\u4e2a\u5143\u7d20\uff0c\u5e76\u8fd4\u56de\u8be5\u5143\u7d20\u3002<\/li>\n\n\n\n
              • \u8bed\u6cd5<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
                  array.shift()<\/code><\/pre>\n\n\n\n
                  \n
                • \u793a\u4f8b<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
                    let arr = [1, 2, 3];\n  let firstElement = arr.shift(); \/\/ 1\n  console.log(arr); \/\/ [2, 3]<\/code><\/pre>\n\n\n\n
                    \n
                  • \u517c\u5bb9\u6027<\/strong>\uff1a\u6240\u6709\u4e3b\u6d41\u6d4f\u89c8\u5668\u90fd\u652f\u6301\u3002<\/li>\n<\/ul>\n\n\n\n
                    4. unshift()<\/code><\/strong><\/h4>\n\n\n\n
                      \n
                    • \u529f\u80fd<\/strong>\uff1a\u5728\u6570\u7ec4\u7684\u5f00\u5934\u6dfb\u52a0\u4e00\u4e2a\u6216\u591a\u4e2a\u5143\u7d20\uff0c\u8fd4\u56de\u65b0\u7684\u6570\u7ec4\u957f\u5ea6\u3002<\/li>\n\n\n\n
                    • \u8bed\u6cd5<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
                        array.unshift(element1, element2, ..., elementN)<\/code><\/pre>\n\n\n\n
                        \n
                      • \u793a\u4f8b<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
                          let arr = [2, 3];\n  let newLength = arr.unshift(1); \/\/ [1, 2, 3]\n  console.log(newLength); \/\/ 3<\/code><\/pre>\n\n\n\n
                          \n
                        • \u517c\u5bb9\u6027<\/strong>\uff1a\u6240\u6709\u4e3b\u6d41\u6d4f\u89c8\u5668\u90fd\u652f\u6301\u3002<\/li>\n<\/ul>\n\n\n\n
                          5. map()<\/code><\/strong><\/h4>\n\n\n\n
                            \n
                          • \u529f\u80fd<\/strong>\uff1a\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u662f\u539f\u6570\u7ec4\u5143\u7d20\u7ecf\u8fc7\u6307\u5b9a\u51fd\u6570\u5904\u7406\u540e\u7684\u7ed3\u679c\u3002<\/li>\n\n\n\n
                          • \u8bed\u6cd5<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
                              let newArray = array.map(function(currentValue, index, array) {\n    \/\/ \u8fd4\u56de\u65b0\u7684\u503c\n  })<\/code><\/pre>\n\n\n\n
                              \n
                            • \u793a\u4f8b<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
                                let arr = [1, 2, 3];\n  let result = arr.map(x => x * 2); \/\/ [2, 4, 6]<\/code><\/pre>\n\n\n\n
                                \n
                              • \u517c\u5bb9\u6027<\/strong>\uff1a\u6240\u6709\u4e3b\u6d41\u6d4f\u89c8\u5668\u90fd\u652f\u6301\u3002<\/li>\n<\/ul>\n\n\n\n
                                6. filter()<\/code><\/strong><\/h4>\n\n\n\n
                                  \n
                                • \u529f\u80fd<\/strong>\uff1a\u521b\u5efa\u4e00\u4e2a\u65b0\u6570\u7ec4\uff0c\u5305\u542b\u6240\u6709\u901a\u8fc7\u6d4b\u8bd5\u7684\u5143\u7d20\uff08\u7b26\u5408\u6761\u4ef6\u7684\u5143\u7d20\uff09\u3002<\/li>\n\n\n\n
                                • \u8bed\u6cd5<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
                                    let newArray = array.filter(function(currentValue, index, array) {\n    return condition;\n  })<\/code><\/pre>\n\n\n\n
                                    \n
                                  • \u793a\u4f8b<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
                                      let arr = [1, 2, 3, 4, 5];\n  let result = arr.filter(x => x > 2); \/\/ [3, 4, 5]<\/code><\/pre>\n\n\n\n
                                      \n
                                    • \u517c\u5bb9\u6027<\/strong>\uff1a\u6240\u6709\u4e3b\u6d41\u6d4f\u89c8\u5668\u90fd\u652f\u6301\u3002<\/li>\n<\/ul>\n\n\n\n
                                      7. reduce()<\/code><\/strong><\/h4>\n\n\n\n
                                        \n
                                      • \u529f\u80fd<\/strong>\uff1a\u5bf9\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u6267\u884c\u6307\u5b9a\u64cd\u4f5c\uff0c\u5e76\u5c06\u5176\u7d2f\u79ef\u4e3a\u4e00\u4e2a\u503c\u3002<\/li>\n\n\n\n
                                      • \u8bed\u6cd5<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
                                          let result = array.reduce(function(accumulator, currentValue, index, array) {\n    return accumulator;\n  }, initialValue)<\/code><\/pre>\n\n\n\n
                                          \n
                                        • \u793a\u4f8b<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
                                            let arr = [1, 2, 3, 4];\n  let sum = arr.reduce((acc, curr) => acc + curr, 0); \/\/ 10<\/code><\/pre>\n\n\n\n
                                            \n
                                          • \u517c\u5bb9\u6027<\/strong>\uff1a\u6240\u6709\u4e3b\u6d41\u6d4f\u89c8\u5668\u90fd\u652f\u6301\u3002<\/li>\n<\/ul>\n\n\n\n
                                            8. forEach()<\/code><\/strong><\/h4>\n\n\n\n
                                              \n
                                            • \u529f\u80fd<\/strong>\uff1a\u5bf9\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u6267\u884c\u6307\u5b9a\u7684\u51fd\u6570\uff0c\u4f46\u4e0d\u8fd4\u56de\u65b0\u6570\u7ec4\u3002<\/li>\n\n\n\n
                                            • \u8bed\u6cd5<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
                                                array.forEach(function(currentValue, index, array) {\n    \/\/ \u6267\u884c\u7684\u4ee3\u7801\n  })<\/code><\/pre>\n\n\n\n
                                                \n
                                              • \u793a\u4f8b<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
                                                  let arr = [1, 2, 3];\n  arr.forEach(x => console.log(x)); \/\/ \u8f93\u51fa 1, 2, 3<\/code><\/pre>\n\n\n\n
                                                  \n
                                                • \u517c\u5bb9\u6027<\/strong>\uff1a\u6240\u6709\u4e3b\u6d41\u6d4f\u89c8\u5668\u90fd\u652f\u6301\u3002<\/li>\n<\/ul>\n\n\n\n
                                                  9. find()<\/code><\/strong><\/h4>\n\n\n\n
                                                    \n
                                                  • \u529f\u80fd<\/strong>\uff1a\u8fd4\u56de\u6570\u7ec4\u4e2d\u7b2c\u4e00\u4e2a\u7b26\u5408\u6761\u4ef6\u7684\u5143\u7d20\uff0c\u627e\u4e0d\u5230\u8fd4\u56de undefined<\/code>\u3002<\/li>\n\n\n\n
                                                  • \u8bed\u6cd5<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
                                                      let result = array.find(function(currentValue, index, array) {\n    return condition;\n  })<\/code><\/pre>\n\n\n\n
                                                      \n
                                                    • \u793a\u4f8b<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
                                                        let arr = [1, 2, 3, 4];\n  let result = arr.find(x => x > 2); \/\/ 3<\/code><\/pre>\n\n\n\n
                                                        \n
                                                      • \u517c\u5bb9\u6027<\/strong>\uff1a\u6240\u6709\u4e3b\u6d41\u6d4f\u89c8\u5668\u90fd\u652f\u6301\u3002<\/li>\n<\/ul>\n\n\n\n
                                                        10. includes()<\/code><\/strong><\/h4>\n\n\n\n
                                                          \n
                                                        • \u529f\u80fd<\/strong>\uff1a\u68c0\u67e5\u6570\u7ec4\u4e2d\u662f\u5426\u5305\u542b\u67d0\u4e2a\u5143\u7d20\u3002<\/li>\n\n\n\n
                                                        • \u8bed\u6cd5<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
                                                            array.includes(element, fromIndex)<\/code><\/pre>\n\n\n\n
                                                            \n
                                                          • \u793a\u4f8b<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
                                                              let arr = [1, 2, 3];\n  let result = arr.includes(2); \/\/ true<\/code><\/pre>\n\n\n\n
                                                              \n
                                                            • \u517c\u5bb9\u6027<\/strong>\uff1a\u6240\u6709\u4e3b\u6d41\u6d4f\u89c8\u5668\u90fd\u652f\u6301\u3002<\/li>\n<\/ul>\n\n\n\n
                                                              11. indexOf()<\/code><\/strong><\/h4>\n\n\n\n
                                                                \n
                                                              • \u529f\u80fd<\/strong>\uff1a\u8fd4\u56de\u6307\u5b9a\u5143\u7d20\u5728\u6570\u7ec4\u4e2d\u9996\u6b21\u51fa\u73b0\u7684\u4f4d\u7f6e\uff0c\u5982\u679c\u6ca1\u6709\u5219\u8fd4\u56de -1<\/code>\u3002<\/li>\n\n\n\n
                                                              • \u8bed\u6cd5<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
                                                                  array.indexOf(element, fromIndex)<\/code><\/pre>\n\n\n\n
                                                                  \n
                                                                • \u793a\u4f8b<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
                                                                    let arr = [1, 2, 3];\n  let result = arr.indexOf(2); \/\/ 1<\/code><\/pre>\n\n\n\n
                                                                    \n
                                                                  • \u517c\u5bb9\u6027<\/strong>\uff1a\u6240\u6709\u4e3b\u6d41\u6d4f\u89c8\u5668\u90fd\u652f\u6301\u3002<\/li>\n<\/ul>\n\n\n\n
                                                                    12. sort()<\/code><\/strong><\/h4>\n\n\n\n
                                                                      \n
                                                                    • \u529f\u80fd<\/strong>\uff1a\u5bf9\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u8fdb\u884c\u6392\u5e8f\uff0c\u9ed8\u8ba4\u6309\u5b57\u7b26\u4e32\u7684 Unicode \u7f16\u7801\u987a\u5e8f\u6392\u5e8f\u3002<\/li>\n\n\n\n
                                                                    • \u8bed\u6cd5<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
                                                                        array.sort(compareFunction)<\/code><\/pre>\n\n\n\n
                                                                        \n
                                                                      • \u793a\u4f8b<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
                                                                          let arr = [3, 1, 4, 2];\n  arr.sort(); \/\/ [1, 2, 3, 4]<\/code><\/pre>\n\n\n\n
                                                                          \n
                                                                        • \u517c\u5bb9\u6027<\/strong>\uff1a\u6240\u6709\u4e3b\u6d41\u6d4f\u89c8\u5668\u90fd\u652f\u6301\u3002<\/li>\n<\/ul>\n\n\n\n
                                                                          13. reverse()<\/code><\/strong><\/h4>\n\n\n\n
                                                                            \n
                                                                          • \u529f\u80fd<\/strong>\uff1a\u5c06\u6570\u7ec4\u4e2d\u7684\u5143\u7d20\u987a\u5e8f\u53cd\u8f6c\u3002<\/li>\n\n\n\n
                                                                          • \u8bed\u6cd5<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
                                                                              array.reverse()<\/code><\/pre>\n\n\n\n
                                                                              \n
                                                                            • \u793a\u4f8b<\/strong>\uff1a<\/li>\n<\/ul>\n\n\n\n
                                                                                let arr = [1, 2, 3];\n  arr.reverse(); \/\/ [3, 2, 1]<\/code><\/pre>\n\n\n\n
                                                                                \n
                                                                              • \u517c\u5bb9\u6027<\/strong>\uff1a\u6240\u6709\u4e3b\u6d41\u6d4f\u89c8\u5668\u90fd\u652f\u6301\u3002<\/li>\n<\/ul>\n\n\n\n
                                                                                \n\n\n\n
                                                                                \u7ed3\u8bed\uff1a<\/h3>\n\n\n\n
                                                                                \u8fd9\u4e9b\u65b9\u6cd5\u662f JavaScript \u4e2d\u6700\u5e38\u7528\u7684\u6570\u7ec4\u64cd\u4f5c\u65b9\u6cd5\uff0c\u638c\u63e1\u5b83\u4eec\u80fd\u5e2e\u52a9\u4f60\u5728\u5f00\u53d1\u4e2d\u9ad8\u6548\u5730\u5904\u7406\u6570\u7ec4\u6570\u636e\u3002<\/p>\n\n\n\n
                                                                                \u66f4\u591a\u8be6\u7ec6\u6587\u7ae0\u8bf7\u5173\u6ce8\u5176\u4ed6\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
                                                                                JavaScript \u4e2d\u7684\u6570\u7ec4\u662f\u5b58\u50a8\u591a\u4e2a\u6570\u636e\u9879\u7684\u5bf9\u8c61\uff0c\u5e76\u4e14\u63d0\u4f9b\u4e86\u591a\u79cd\u65b9\u6cd5\u6765\u64cd\u4f5c\u8fd9\u4e9b\u6570\u636e\u3002\u4e0b\u9762\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u6570\u7ec4\u65b9 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[46],"tags":[],"class_list":["post-335","post","type-post","status-publish","format-standard","hentry","category-javascript"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/335","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=335"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/335\/revisions"}],"predecessor-version":[{"id":336,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/335\/revisions\/336"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=335"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=335"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=335"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}