问一个简单问题。JS数组中的字符串怎么转为数值

Question

有一个数组 a===> ["2","3","4","5"] 怎么返回 a====> [2,3,4,5]

麻烦解决下！。谢谢

Answer 1

["2","3","4","5"].map(s => +s);

Answer 2

var a =  ["2","3","4","5"] ;
a.forEach(function(item, index) {
    a[index] = +item;
});

Answer 3

什么数组?js数组?

Answer 4

parseInt('23');

var a = ['1','2','3'],
    b = a.map(function(e){return parseInt(e);});

Answer 5

写个循环，在➕parseint或者parsefloat或者number

Answer 6

a.forEach(function(m){
    m = parseInt(m)
})

Answer 7

<script>
    var a =  ["2","3","4","5"];
    console.log(a);
    for (index in a) {
        a[index] = parseInt(a[index]);
    }
    console.log(a);
</script>