Run results for: eliminate duplicates from an array of strings

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:101.0) Gecko/20100101 Firefox/101.0

Browser: Firefox 101

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Tests:

Set
const str = 'Hello world nice to meet you hello again world'; console.log('unique words:', [...new Set(str.toLowerCase().split(/\s+/))]);
Lookup
const str = 'Hello world nice to meet you hello again world'; const words = {}; for ( const word of str.toLowerCase().split(/\s+/)) { words[word] = word; } console.log('unique words:', Object.keys(words));
filter
const str = 'Hello world nice to meet you hello again world'; console.log('unique words:',str.toLowerCase().split(/\s+/).filter((v, i, m) => i === m.indexOf(v)));
lookup let
const str = 'Hello world nice to meet you hello again world'; const words = {}; for ( let word of str.toLowerCase().split(/\s+/)) { words[word] = word; } console.log('unique words:', Object.keys(words));
regex
const str = 'Hello world nice to meet you hello again world'; console.log('unique words:',str.replace(/(\b\S.+\b)(?=.*\1)/g, "").trim());