I just have object, that contains arrays in keys, and I need get array of string with name property. I cope to do it with flat, but probably there is better solution
const testObj = {
first: [ { name: 'Den' }, { name: 'Ben' } ],
second: [ { name: 'Ken} ]
}
Expected result:
['Den', 'Ben', 'Ken' ]
My solution:
const res = Object.keys(testObj).map(key=>{
return testObj[key].map(el=>el.name)
}).flat(1)
You can use flatMap instead of calling map and flat separately. Also you can replace Object.keys with Object.values
const testObj = {
first: [ { name: 'Den' }, { name: 'Ben' } ],
second: [ { name: 'Ken'} ]
}
const res = Object.values(testObj).flatMap(val => val.map(el => el.name))
console.log(res)If you can't use flatMap, you can flatten the array using Array.prototype.concat:
const testObj = {
first: [ { name: 'Den' }, { name: 'Ben' } ],
second: [ { name: 'Ken'} ]
}
const res = [].concat.apply([], Object.values(testObj).map(val => val.map(el => el.name)));
console.log(res)This looks efficient...
const testObj = {
first: [ { name: 'Den' }, { name: 'Ben' } ],
second: [ { name: 'Ken'} ]
}
let sol = [];
Object.values(testObj).forEach( list => list.forEach( el => sol.push(el.name)))
console.log(sol);
