Run results for: Regex vs split/join vs substring

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.107 Safari/537.36 Edg/92.0.902.62

Browser: Chrome 92

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Script Preparation code:

var str = 'hEllo#hello#####jhSdjf#';

Tests:

Regex
const [whole, one, two] = [...str.matchAll(/([^#]*)#(.*)/gmi)]; const result = one+"#"+two
Split and Join
const [beforeHash, ...afterFirstHash] = str.split('#'); const result = beforeHash+"#"+afterFirstHash.join("#")
indexof
const ind = str.indexOf('#'); const result = str.substring(0, ind) + "#" + str.substring(ind+1);