'Hwo to change dynamically the last two parameteres?

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(' '));
javascriptalgorithm


Solution 1:[1]

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)

Solution 2:[2]

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`)

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 Martinez
Solution 2 Scott Sauyet

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