使用下划线组合两个对象数组 [英] Combine two arrays of objects using underscore

问题描述

我有两个对象数组：

var a = [{id:456, name:'sojuz'},
         {id:751, name:'sputnik'},
         {id:56, name:'arianne'}]

var b = [{id:751, weight:5800},
         {id:456, weight:2659},
         {id:56, weight:6700}]

使用underscorejs如何将数组a扩展到新数组c从数组b添加权重属性，其中id属性相同：

Using underscorejs how to extend array a into new array c adding weight property from array b where the id property is the same:

var c = [{id:456, name:'sojuz', weight:2659},
         {id:751, name:'sputnik', weight:5800},
         {id:56, name:'arianne', weight:6700}]

推荐答案

这是用下划线做的一种方法：

This is one way of doing it with underscore:

var c = _.map(a, function(element) {
    var treasure = _.findWhere(b, { id: element.id });

    return _.extend(element, treasure);
});

如果你想用它来摆弄（看我在那里做了什么）： http://jsfiddle.net/b90pyxjq/3/

If you want to fiddle (See what I did there) with it: http://jsfiddle.net/b90pyxjq/3/

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