I have the followng string
https://picsum.photos/id/1025/4951/3301
I need to replace here the last two numbers 4951 and 3301 with 200 so at the end i will have https://picsum.photos/id/1025/200/200
How can i do this automatically ?
what i tried
i tried to split them by '/'
const splittedUrl = image.download_url.split('/');
splittedUrl[splittedUrl.length - 1] = '200';
splittedUrl[splittedUrl.length - 2] = '200';
but it is not possible because i have // after https
so when i join it i get wrong output at the end
console.log(splittedUrl.join(' '));
You are doing all good just instead join the string with empty string join with the /
const stringVal = 'https://picsum.photos/id/1025/4951/3301';
const stringSplited = stringVal.split('/');
stringSplited[stringSplited.length - 1] = '200';
stringSplited[stringSplited.length - 2] = '200';
const stringJoined = stringSplited.join('/')
//this will log the following: https://picsum.photos/id/1025/200/200
console.log(stringJoined)A regular expression replacement is designed for this sort of work. A simple one which matches a / followed by some digits, followed by another /, some more digits, and the end of the string is /\/\d+\/\d+$/. We can write it like this:
const replaceLastTwos = (s1, s2) => (s) =>
s .replace (/\/\d+\/\d+$/, `/${s1}/${s2}`)
const replaceLastTwoWith200s = replaceLastTwo (200, 200)
console .log (replaceLastTwoWith200 ('https://picsum.photos/id/1025/4951/3301'))Of course if those 200s are really fixed, you can simplify this to:
const replaceLastTwoWith200s = (s) => s .replace (/\/\d+\/\d+$/, `/200/200`)