[英]How to push objects into array inside of a JavaScript Prototype?
I have an Angular Factory whose job is to save special objects and retrieve them later. 我有一个Angular Factory,其工作是保存特殊对象并在以后检索它们。
(Used to save the users workflow when he switches views). (用于在切换视图时保存用户工作流程)。
Basically I need to save objects with a name, as well as an array of tags. 基本上我需要保存带有名称的对象以及一组标签。 My problem is with the saving the tags into the array part.
我的问题是将标签保存到数组部分。
The Prototype constructor: Prototype构造函数:
// define the TagsObject constructor function
var TagsObject = function(name, tag) {
this.name = name;
this.tags = [].push(tag);
return this;
};
Full factory code: 完整的工厂代码:
.factory('TagFactory', [function() {
// Init TagFactory:
var tagContainers = [];
// define the TagsObject constructor function
var TagsObject = function(name, tag) {
this.name = name;
this.tags = [].push(tag);
return this;
};
console.log('tagFactory');
console.log(TagsObject);
var saveTags = function(name, tag) {
tagContainers.push(new TagsObject(name, tag));
console.log('saveTags:');
console.log(tagContainers);
};
var getTags = function(name) {
console.log(name);
return this;
};
return {
saveTags : saveTags,
getTags : getTags
};
}]);
In a different controller I now save some data into a new Prototype
inside of the TagFactory: 在不同的控制器中,我现在将一些数据保存到TagFactory内的
new Prototype
中:
TagFactory.saveTags('TEST', tagObj);
Now back in my Factory, where you see the console.log(nameTagContainers);
现在回到我的工厂,在那里你可以看到
console.log(nameTagContainers);
the following is the log: 以下是日志:
[TagsObject]
0: TagsObject
tags: 1
name: "TEST"
__proto__: TagsObject
length: 1
__proto__: Array[0]
^ tags is an Array, but it's showing 1, instead of the Object details... do you see where I went wrong? ^标签是一个数组,但它显示1,而不是对象详细信息...你看到我哪里出错了吗?
UPDATE: This question was answered below by Kauê Gimenes , however I'm sharing the extra code I added to fix my other problem. 更新: KauêGimenes在下面回答了这个问题,但我正在分享我为解决其他问题而添加的额外代码。
Which was every time a new tag was selected for a currently selected name, it generated a new Prototype, instead of saving the tag into an existing Prototype: 每当为当前选择的名称选择新标签时,它就会生成一个新的Prototype,而不是将标签保存到现有的Prototype中:
var saveTags = function(name, tag) {
console.log(tagContainers.length);
if (tagContainers.length != 0) {
for(var i = 0; i < tagContainers.length; i++) {
if (tagContainers[i].name == name) {
console.log('Found existing name! Add tag to existing obj');
tagContainers[i].tags.push(tag);
break;
} else {
console.log('New name, create new obj');
tagContainers.push(new TagsObject(name, tag));
}
}
}
else {
console.log('New name, init: create the first obj');
tagContainers.push(new TagsObject(name, tag));
}
console.log(' ');
console.log('tagContainers:');
console.log(tagContainers);
};
Try this approach: 试试这种方法:
// define the TagsObject constructor function
var TagsObject = function(name, tag) {
this.name = name;
this.tags = [tag];
return this;
};
The best way to initialize an array is to include the elements inside the brackets 初始化数组的最佳方法是在括号内包含元素
[ 1 , 2 , 3 ]
But in case you want to initialize with n elements you could use the concat
function. 但是如果你想用n个元素初始化,你可以使用
concat
函数。
[ 1 ].concat([ 2 , 3 , 4 ])
The result would be: 结果将是:
[ 1 , 2 , 3 , 4 ]
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