我想知道是否有一种方法可以在JavaScript中实现PHPforeach循环.我正在寻找的功能类似于以下PHP代码片段:
foreach($data as $key => $value) { }
I was looking at the JS for..in loop, but there seems to be no way to specify the as. If I do this with a 'normal' for loop (for(var i = 0; i < data.length; i++), is there a way to grab the key => value pairs?
如果可以在本机上使用ES6或与Babel(js编译器)一起使用，则可以执行以下操作:
const test = {a: 1, b: 2, c: 3};
for (const [key, value] of Object.entries(test)) {
console.log(key, value);
}将打印此输出:
a 1
b 2
c 3
Object.entries()方法返回给定对象自身的可枚举属性[key, value]对的数组，其顺序与for...in循环(the difference being that a for-in loop enumerates properties in the prototype chain as well)提供的顺序相同.
希望能有所帮助！=)