WebDec 5, 2024 · 普通对象为何不能被 for of 迭代. 前面我们有提到一个词叫“可迭代”数据结构，当用for of迭代普通对象时，也会报一个“not iterable”的错误。实际上，任何具有 … Webvariable. 反復処理の各回において、一連のデータから値を受け取ります。const, let, var の何れかで定義されたものか、代入のターゲットとなります（以前に宣言した変数や、オブジェクトプロパティなど）。. iterable. 反復可能オブジェクトです。

可以遍历大部分数据类型的 for…of 为什么不能遍历普通对象？

WebThe for..of loop in our example iterates over the values of a data structure. The values in this specific example are 'el1', 'el2', 'el3'.The values which an iterable data structure will return using for..of is dependent on the type of iterable object. For example an array will return the values of all the array elements whereas a string returns every individual character of the … WebDec 16, 2024 · 我们可以简单查看几个可被for of迭代的对象，看看和普通对象有何不同：. 可以看到，这些可被for of迭代的对象，都实现了一个Symbol (Symbol.iterator)方法，而普通对象没有这个方法。. 简单来说，for of 语句创建一个循环来迭代可迭代的对象，可迭代的对象 … thm vs ww

javascript - What is the difference between ( for... in ) and ( for ...

Webfor (variavel of iteravel) { declaração } variável. A cada iteração, um valor de uma propriedade diferente é atribuido à variável.. iteravel. Objeto cujos atributos serão iterados. Web1. The only key differences that you'll have to consider would be. Say you want to start your loop from a specific index, you can do that with your traditional for loop but not using for...of. You can't access indices of your array elements natively. You'll need to … thm webmail passwort vergessen