Run results for: Two Arrays to Object #3

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:72.0) Gecko/20100101 Firefox/72.0

Browser: Firefox 72

Operating system: Linux

Device Platform: Desktop

Date tested: 4 years ago

Script Preparation code:

keys = ["a","b","c","d"];
values = [1,2,3,4];

Tests:

forEach #1
const ob = {}; keys.forEach((key, i)=>ob[key]=values[i]);
fromEntries and map #1
const ob = Object.fromEntries( keys.map((key, i)=>[key, values[i]]) );
Object.assign and map #1
const ob = Object.assign( ...keys.map((k, i) => ({[k]: values[i]})) );
reduce #1
const ob = keys.reduce( (o, k, i) => ({...o, [k]: values[i]}), {} );
for
const ob = {}; for (let key=0; key<keys.length; key++) { ob[keys[key]] = values[key]; }
forEach #2
const ob = {}; const fn = (key, i)=>ob[key]=values[i]; keys.forEach(fn);
fromEntries and map #2
const fn = (key, i)=>[key, values[i]]; const ob = Object.fromEntries(keys.map(fn));
Object.assign and map #2
const fn = (k, i) => ({[k]: values[i]}); const ob = Object.assign( ...keys.map(fn) );
reduce #2
const fn = (o, k, i) => ({...o, [k]: values[i]}); const ob = keys.reduce(fn, {});