javascript 使用顺序 for 循环遍历关联数组
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Iterate through associative array using sequential for loop
提问by Jacob
I have a lot of data stored in associative array.
我有很多数据存储在关联数组中。
array = {'key':'value'};
How to loop throught an array like this using an normal for loop and not a loop like here: http://jsfiddle.net/HzLhe/
如何使用普通的 for 循环而不是像这里的循环来遍历这样的数组：http: //jsfiddle.net/HzLhe/
I don't want to use for-in because of this problems: Mootools when using For(...in Array) problem
我不想使用 for-in 因为这个问题： Mootools when using For(...in Array) 问题
回答by Jeff Shaver
As others have pointed out, this isn't an array. This is a JavaScript object. To iterate over it, you will have to use the for...in loop. But to filter out the other properties, youw ill have to use hasOwnProperty.
正如其他人指出的那样，这不是一个数组。这是一个 JavaScript 对象。要迭代它，您必须使用 for...in 循环。但是要过滤掉其他属性，您将不得不使用hasOwnProperty.
Example:
例子：
var obj={'key1': 'value1','key2':'value2'};
for (var index in obj) {
if (!obj.hasOwnProperty(index)) {
continue;
}
console.log(index);
console.log(obj[index]);
}
回答by Graham
JavaScript does not have the concept of associative arrays. Instead you simply have an object with enumerable properties, so use a for..in loop to iterate through them. As stated above you may also want to perform a check with hasOwnPropertyto ensure that you're not performing operations on inherited properties.
JavaScript 没有关联数组的概念。相反，您只需拥有一个具有可枚举属性的对象，因此请使用 for..in 循环来遍历它们。如上所述，您可能还想执行检查hasOwnProperty以确保您没有对继承的属性执行操作。
for (var prop in obj){
if (obj.hasOwnProperty(prop)){
console.log(obj[prop]);
}
}
