javascript 如何更新 angular.forEach() 中的当前值？
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How to update current values inside an angular.forEach()?
提问by Raphael Rafatpanah
I am trying to convert a portion of an object's values from integer values 1 or 0 to boolean values true or false.
我试图将对象值的一部分从整数值 1 或 0 转换为布尔值 true 或 false。
The structure is as follows:
结构如下：
angular.forEach(a.b.c, function (options) {
...
angular.forEach(options, function (value, option) {
if (value == 0) {
option = false;
} else {
option = true;
}
console.log(option + " = " + value); // This shows correct results;
}
}
console.log(a.b.c) // when navigating to the options, the options have not changed from their integer values.
What am I missing?
我错过了什么？
回答by Arun P Johny
You are just changing the value of the local variable to false/true, not changing the value of the object.
您只是将局部变量的值更改为 false/true，而不是更改对象的值。
var array = [{
key: 1
}, {
key: 0
}];
angular.forEach(array, function(options) {
angular.forEach(options, function(value, option) {
if (value == 0) {
options[option] = false;
} else {
options[option] = true;
}
//the if else can be simplified to
//options[option] = value != 0;
console.log(option + " = " + options[option]);
})
})
console.log(array);<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>If you know the key to be updated then
如果您知道要更新的密钥，那么
var array = [{
key: 1
}, {
key: 0
}];
angular.forEach(array, function(options) {
options.key = options.key != 0;
})
console.log(array);<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>