Remove a character at a certain position in a string - javascript

Question

Is there an easy way to remove the character at a certain position in javascript?

e.g. if I have the string "Hello World", can I remove the character at position 3?

the result I would be looking for would the following:

"Helo World"

This question isn't a duplicate of How can I remove a character from a string using JavaScript?, because this one is about removing the character at a specific position, and that question is about removing all instances of a character.

This isn't a duplicate. This question is about removing an known character from a certain position. The duplicate is about removing a known character from an arbitrary position. — Matt, Sep 18 '14 at 09:04
@MT0 Nope. This question is about removing the character at a particular index - and that question is about removing instances of a particular character from a string. — starbeamrainbowlabs, May 04 '17 at 13:01
@starbeamrainbowlabs No, it is an exact duplicate; the linked question is about removing the 4th character (which just happens to also always be an `r`). The [accepted answer here](http://stackoverflow.com/a/11116529/1509264) is identical to the [2nd highest voted answer](http://stackoverflow.com/a/9933072/1509264) on that question. — MT0, May 04 '17 at 13:33

score 158 · Accepted Answer · edited Apr 29 '20 at 04:17

158

It depends how easy you find the following, which uses simple String methods (in this case slice()).

var str = "Hello World";
str = str.slice(0, 3) + str.slice(4);
console.log(str)

edited Apr 29 '20 at 04:17

Jonathan

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answered Jun 20 '12 at 09:26

Matt

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Thank You! I knew that there would be a simple solution. I didn't think of that :-) – starbeamrainbowlabs Jun 20 '12 at 09:29
@Zon: Exactly, and that's the idea. When coupled with `+ str.slice(4);`, you end up removing the 3rd character (zero indexed) in the string `str`. `str.slice(0, 3) + str.slice(4) // Helo World` – Matt Dec 09 '14 at 13:02
1

Just to put my dollar: str.slice(0, 3) gives 'Hel' (take from 1st to 3rd symbol); str.slice(4) gives 'o World' (take all after 4th symbol); you can also set cutting borders like this: str.slice(0, -6) to get 'Hello'. – Zon Dec 09 '14 at 13:06
function removeByIndex(aStr,index){ if(index==aStr.length-1){ return aStr.slice(0,aStr.length-1); } else{ return aStr.slice(0,index)+aStr.slice(index+1); } } function myFunction() { var str = "abc"; var res =removeByIndex(str,2); console.log(res); } – Asutosh Aug 09 '19 at 04:37

score 21 · Answer 2 · edited Mar 17 '22 at 07:28

21

You can try it this way:

var str = "Hello World";
var position = 6; // its 1 based
var newStr = str.substring(0, position - 1) + str.substring(position, str.length);
alert(newStr);

Here is a live example: http://jsbin.com/ogagaq

edited Mar 17 '22 at 07:28

zyrup

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answered Jun 20 '12 at 09:33

Ishan Dhingra

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What if the postion variable gets the value 0? The first character is not deleted. – Georgios Syngouroglou Apr 22 '17 at 09:45
@GeorgeSiggouroglou Thanks for pointing out, actually the position variable is 1 based(I commented 0). Just fixed the comment. – Ishan Dhingra Apr 23 '17 at 13:05

Alexandre Daubricourt · Answer 3 · 2018-04-07T09:22:24.887

18

Turn the string into array, cut a character at specified index and turn back to string

let str = 'Hello World'.split('')

str.splice(3, 1)
str = str.join('')

// str = 'Helo World'.

edited Apr 07 '18 at 09:22

answered Apr 10 '17 at 11:37

Alexandre Daubricourt

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You could even use do `[...'Hello world!'].splice(3, 1).join('')`. – Amin NAIRI Apr 04 '18 at 08:44
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@AminNAIRI I'm afraid it won't work. – Alexandre Daubricourt Apr 07 '18 at 09:23

Surendranath Sonawane · Answer 4 · 2020-09-18T21:26:08.083

7

If you omit the particular index character then use this method

function removeByIndex(str,index) {
      return str.slice(0,index) + str.slice(index+1);
}
    
var str = "Hello world", index=3;
console.log(removeByIndex(str,index));

// Output: "Helo world"

edited Sep 18 '20 at 21:26

answered May 03 '17 at 12:57

Surendranath Sonawane

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What if index=0? – Ali Nouman Mar 10 '19 at 08:54
@Ali I got the issue, Thanks for Inform me. I Update the code. – Surendranath Sonawane Mar 15 '19 at 04:53
I believe this also fails for index = 1, removes index 0 instead – Erick A. Montañez Sep 04 '20 at 18:30
@Erick misteck corrected thanks for pointing out. – Surendranath Sonawane Sep 18 '20 at 21:29

score 4 · Answer 5 · answered Jun 20 '12 at 09:32

    var str = 'Hello World';
                str = setCharAt(str, 3, '');
                alert(str);

function setCharAt(str, index, chr)
        {
            if (index > str.length - 1) return str;
            return str.substr(0, index) + chr + str.substr(index + 1);
        }

score 1 · Answer 6 · edited Jun 20 '12 at 21:28

1

you can use substring() method. ex,

var x = "Hello world"
var x = x.substring(0, i) + 'h' + x.substring(i+1);

edited Jun 20 '12 at 21:28

Bhavesh G

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answered Jun 20 '12 at 09:46

score 0 · Answer 7 · edited Feb 05 '16 at 19:01

Hi starbeamrainbowlabs ,

You can do this with the following:

var oldValue = "pic quality, hello" ;
var newValue =  "hello";
var oldValueLength = oldValue.length ;
var newValueLength = newValue.length ;
var from = oldValue.search(newValue) ;
var to = from + newValueLength ;
var nes = oldValue.substr(0,from) + oldValue.substr(to,oldValueLength);
console.log(nes);

I tested this in my javascript console so you can also check this out Thanks

score -1 · Answer 8 · edited Jul 14 '12 at 22:59

-1

var str = 'Hello World',
    i = 3,
    result = str.substr(0, i-1)+str.substring(i);

alert(result);

Value of i should not be less then 1.

edited Jul 14 '12 at 22:59

tereško

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answered Jun 20 '12 at 09:33

artis

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What's `i`? Why should it not be less than 1 instead of 0? – starbeamrainbowlabs Apr 10 '17 at 12:13

Remove a character at a certain position in a string - javascript

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