合并包含数组的对象

Question

如何使用 lodash 合并包含数组和其他字段的两个对象？

例如，

obj1 = {
    name: "abc",
    hobbies: ["reading","cricket"]
}
obj2 = {
    name: "abc2",
    hobbies: ["reading","hockey"]
}
_.merge(obj1, obj2)

// output
{
    name: "abc2",
    hobbies: ["reading","hockey"]
}

这个 returns 将 obj1 合并到 obj2 后的一个对象，但没有合并爱好。

Answer 1

Underscore.js doesn't have a _.merge function so I'm assuming you're using Lo-Dash。如果是这样的话，你可以使用 callback 参数来做你想做的事情

var obj1 = { name: 'abc', hobbies: ['reading', 'cricket'] };
var obj2 = { name: 'def', hobbies: ['reading', 'hockey'] };

var output = _.merge(obj1, obj2, function(a,b) {
    return _.isArray(a) ? _.union(a,b) : undefined;
} );
console.log( output );

// output

{ name: 'def', hobbies: ['reading', 'cricket', 'hockey'] }

编辑

工作JSFiddle。

合并包含数组的对象

Merge objects containing array

javascript

lodash

编辑