将同一数组内的多个对象合并为一个对象 [英] Merge multiple objects inside the same array into one object

问题描述

var arrObj = [{a:1, b:2},{c:3, d:4},{e:5, f:6}];

如何将其合并为一个对象?

how can i merge this into one obj?

//mergedObj = {a:1, b:2, c:3, d:4, e:5, f:6}

推荐答案

如果您的环境支持 Object.assign，然后你可以像这样以简洁的方式做同样的事情

If your environment supports Object.assign, then you can do the same in a succinct way like this

const arrObj = [{a: 1, b: 2}, {c: 3, d: 4}, {e: 5, f: 6}];

console.log(arrObj.reduce(function(result, current) {
  return Object.assign(result, current);
}, {}));

// If you prefer arrow functions, you can make it a one-liner ;-)
console.log(arrObj.reduce(((r, c) => Object.assign(r, c)), {}));

// Thanks Spen from the comments. You can use the spread operator with assign
console.log(Object.assign({}, ...arrObj));

ES5 解决方案:

您可以使用Array.prototype.像这样减少

var resultObject = arrObj.reduce(function(result, currentObject) {
    for(var key in currentObject) {
        if (currentObject.hasOwnProperty(key)) {
            result[key] = currentObject[key];
        }
    }
    return result;
}, {});

console.log(resultObject);
# { a: 1, b: 2, c: 3, d: 4, e: 5, f: 6 }

这个解决方案，简单地收集result中每个对象中的所有键和它们的值，最后作为结果返回给我们.

This solution, simply gathers all the keys and their values in every object in the result, which is finally returned to us as the result.

这个支票

if (currentObject.hasOwnProperty(key)) {

有必要确保我们没有在结果中包含所有继承的可枚举属性.

is necessary to make sure that we are not including all the inherited enumerable properties in the result.

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