arr.reduce((prev, curr) => Object.assign(prev, curr), {})

arr.reduce((prev, next) => { Object.keys(next).forEach((item) => { prev[item] = next[item] }) return prev }, {})

@冴宇 and @cool_zjy’s solutions are similar, but they both generate a new object. According to the original question, the initial value ofreduceis passed intoObjinstead of{}. The former does not require ES6 features, the latter does.

@hsfzxjy’s method seems to be simple, but it will generate a lot of intermediate objects, so the efficiency should not be very good.

Object.assignshould be the simplest solution. Of course, maybe a simpler API can be found in the Lodash library to implement it.

Laxative. Using the ES6 Spread Operator can be more concise, but the essence is the same

let arr = [ {a: 'aa'}, {b: 'bb'}, {c: 'cc'} ] let obj = arr.reduce((x, y) => ({...x, ...y}), {}) console.log(obj)

Question and answer first, use Object.assign() to merge, I don’t know if there are other good methods