How to trim an unwanted continuous string at end in javascript?

Question

I am trying to trim a string with unnecessary characters at the end as below. I would appreciate either if someone corrects me or provide me an easy approach!!

Expected Result: finalString, Hello ---- TecAdmin

const longStr = "Hello ---- TecAdmin------------";

function trimString(str) {
  const lastChar = str[str.length - 1];
  if(lastChar === '-') {
   str = str.slice(0, -1);
   trimString(str);
  } else {
   console.log(str,'finally')
   return str;
  }
}

const finalString = trimString(longStr);

console.log('finalString', finalString)

@Deryck Thanks for replying, In my case i may have '----' in the middle of the string. I dont wanna remove the hyphens in the middle — sumanth, Sep 21 '19 at 14:25
Can't we trim only at the end defining the unwanted element using regex? @Deryck — sumanth, Sep 21 '19 at 14:37
@sumanth use `$` anchor, which means end of the string, `.replace(/-+$/g,'')` this will trim all the `-` at the end — Code Maniac, Sep 21 '19 at 16:51

score 2 · Answer 1 · answered Sep 21 '19 at 14:29

2

Try this out - replace only 5 or more -

longStr.replace(/-{5,}/g, '')

answered Sep 21 '19 at 14:29

Deryck

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lukkea · Accepted Answer · 2019-09-21T14:46:17.753

1

Working off Deryck's comments & answer, but allowing for any number of dashes on the end:

const longStr = "Hello ---- TecAdmin------------";
var thing = longStr.replace(/-*$/g, '');
console.log(thing);

edited Sep 21 '19 at 14:46

answered Sep 21 '19 at 14:42

lukkea

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score 0 · Answer 3 · answered Sep 21 '19 at 14:33

0

use split to split the string into an array, then use pop however many times to remove characters at the end. you can test the last character each time and use pop if its a "-"

//js
const longStr = "Hello ---- TecAdmin------------";
let splitLongStr = longStr.split('');

for (let i=0; i<splitLongStr.length; i++) {
  splitLongStr.pop();
}

let longStrChopped = splitLongStr.join('');

answered Sep 21 '19 at 14:33

sao

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this works, i just tested in a node JS env. it might leave you with one left over dash, just modify how many times you run the loop `i<...` and have fun! problem solved – sao Sep 21 '19 at 14:37

How to trim an unwanted continuous string at end in javascript?

3 Answers3