javascript - 如何用map把数组里的string变成number

Question

一个数组["125","445","22","45","68","32","98"]，想要变成[125,445,22,45,68,32,98]，不用for循环，怎么做

Answer 1

(function(){
var arr = ["125","445","22","45","68","32","98"];
arr = arr.map(function(el){return parseInt(el);});
});

Answer 2

php//其实也是循环
var arr=["125","445","22","45","68","32","98"].map(function(i){
 return +i;
})
console.log(arr);

Answer 3

妥善的转换方式显然是 parseInt

console.log( + "100rmb" ) // NaN

Answer 4

a.reduce(function(prev, a){ prev.push(+a); return prev;}, []);

//其实还是循环