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  • javascript数组操作

    <!DOCTYPE html>
    <html>
    <head>
      <meta charset="utf-8">
      <title>菜鸟教程(runoob.com)</title>
    </head>
    <body>
    <p id="demo0">删除最后一个元素</p>
    <p id="demo1">数组最后添加一个元素</p>
    <p id="demo2">指定索引添加元素</p>
    <p id="demo3">指定索引删除元素</p>
    <p id="demo4">创建数组并填充元素</p>
    <p id="demo5">数组排序</p>
    <p id="demo6">数组倒序</p>
    <button onclick="myFunction()">点我</button>
    <script>
      function myFunction() {
        var arr0 = ["1", "2", "3", "4"];
        arr0.pop();
        document.getElementById("demo0").innerHTML = arr0;
        var arr1 = ["1", "2"];
        arr1.push("3");
        document.getElementById("demo1").innerHTML = arr1;
        var arr2 = ["1", "3"];
        arr2.splice(1, 0, "2");
        document.getElementById("demo2").innerHTML = arr2;
        var arr3 = ["1", "4", "2", "3"];
        arr3.splice(1, 1);
        document.getElementById("demo3").innerHTML = arr3;
        var arr4 = new Array(3);
        arr4.fill('1');
        document.getElementById("demo4").innerHTML = arr4;
        var arr5 = [{num:3},{num:2},{num:1}];
        arr5.sort(function(a,b){
            return (a.num-b.num)*(-1)
        });
        document.getElementById("demo5").innerHTML = JSON.stringify(arr5);
        var arr6 = [1,4,2,3];
        arr6.reverse();
        document.getElementById("demo6").innerHTML = arr6;
      }
    </script>
    </body>
    </html>
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  • 原文地址:https://www.cnblogs.com/linding/p/14047448.html
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