JavaScript:删除共享相同属性值的对象的重复项 [英] JavaScript: Remove duplicates of objects sharing same property value
问题描述
我有一个对象数组,我想根据特定的 key:value
对修剪这些对象.我想创建一个数组,其中每个特定的 key:value
对只包含一个对象.将重复项中的哪个对象复制到新数组中并不重要.
I have an array of objects that I would like to trim down based on a specific key:value
pair. I want to create an array that includes only one object per this specific key:value
pair. It doesn't necessarily matter which object of the duplicates is copied to the new array.
例如,我想根据 arrayWithDuplicates
的 price
属性进行修剪,创建一个仅包含每个值之一的新数组:
For example, I want to trim based on the price
property of arrayWithDuplicates
, creating a new array that only includes one of each value:
var arrayWithDuplicates = [
{"color":"red",
"size": "small",
"custom": {
"inStock": true,
"price": 10
}
},
{"color":"green",
"size": "small",
"custom": {
"inStock": true,
"price": 30
}
},
{"color":"blue",
"size": "medium",
"custom": {
"inStock": true,
"price": 30
}
},
{"color":"red",
"size": "large",
"custom": {
"inStock": true,
"price": 20
}
}
];
会变成:
var trimmedArray = [
{"color":"red",
"size": "small",
"custom": {
"inStock": true,
"price": 10
}
},
{"color":"green",
"size": "small",
"custom": {
"inStock": true,
"price": 30
}
},
{"color":"red",
"size": "large",
"custom": {
"inStock": true,
"price": 20
}
}
];
是否有 JavaScript 或 Angular 函数可以循环执行此操作?
Is there a JavaScript or Angular function that would loop through and do this?
要过滤的属性嵌套在另一个属性中.
The property to filter on is nested within another property.
推荐答案
您可以使用 underscore 来解决这个问题:
You can use underscore for this:
//by size:
var uSize = _.uniqBy(arrayWithDuplicates, function(p){ return p.size; });
//by custom.price;
var uPrice = _.uniqBy(arrayWithDuplicates, function(p){ return p.custom.price; });
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