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2024-08-28 21:22:27   213人阅读

lodash常用函数一

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>lodash常用函数</title>
</head>
<body>
<script src="//cdn.bootcss.com/lodash.js/4.16.1/lodash.min.js"></script>
<p>1.for 循环   _.times()</p>
<script>
    /*for(let i = 0 ;i <5; i ++){
        //
    }*/

    _.times(5,function (i) {
        //
        console.log("times: "+i);
    })
</script>
<p>2. json 取数据  _.map()</p>
<script>
    var ownerArr = [
        {
            "owner":"aa",
            "pets":[{"name":"dog1"},{"name":"dog2"}]
        },
        {
            "owner":"bb",
            "pets":[{"name":"dog11"},{"name":"dog12"}]
        },

    ];
    // 1
    ownerArr.map(function (owner) {
        return owner.pets[0].name;
    });
    //  2
    console.log("json： "+ownerArr.map(owner => owner.pets[0].name));
    //3
    console.log(‘josn2: ‘ + _.map(ownerArr,‘pets[0].name‘))
</script>
<p>3. es6 map复习    map相当于 for 循环 </p>
<script>

    console.log("map1: "+[1, 2, 3].map(x => x * 2));

    let arr = [4,5,60].map(x=>x*3);
    console.log("map2: "+arr);
    var arr2 = [6,7,8];

    for(var i = 0 ;i<arr2.length;i++){
        console.log(‘arr2: ‘ + arr2[i]*2);
    }
</script>
</body>
</html>
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