How to replace a word in JavaScript?

Question

Suppose we have a string: "Someone one one-way" And I want to replace THE WORD "one" with THE WORD "two".

Note: I don't want "someone" or "one-way" to change.

I tried to use str.replace(/one/g , "two"); But the result was "Sometwo two two-way"

This is not the intended result... I want to get "Someone two one-way"

ANY HELP WOULD BE APPRECIATED. THANKS IN ADVANCE....

@kevin b its not a duplicate... Because In this post I asked for replacing a word NOT MERE ALL OCCURRENCES ... — William, Nov 12 '18 at 16:47
@William your accepted answer replaces *all* occurrences that match the regexp. There just so happens to only be one in your given string. You never stated you only wanted to replace one occurrence, you simply pointed out that you wanted it to catch a specific type of occurance, one that isn't part of another word. The dupe target has several answers that accomplish that. — Kevin B, Nov 12 '18 at 16:54

miglio · Accepted Answer · 2018-11-12T16:55:12.853

1

You can validate the spaces too:

//var str = "Someone one one-way";
var str = "one one Someone one one-way one,one";

var replace='two';
//using lookahead and lookbehind
var result= str.replace(/(?<=[^a-zA-Z-]|^)one(?=[^a-zA-Z-]|$)/gm , "two");

console.log(result);
//result: two two Someone two one-way two,two

edited Nov 12 '18 at 16:55

answered Nov 12 '18 at 16:13

miglio

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using also lookahead and lookbehind – miglio Nov 12 '18 at 16:56

Hammerbot · Answer 2 · 2018-11-12T16:40:24.167

0

eval('STR.SPLIT(" ONE ").JOIN(" TWO ")'.toLowerCase())

edited Nov 12 '18 at 16:40

answered Nov 12 '18 at 16:13

Hammerbot

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Ok but what if the word was at the end of the sentence? – William Nov 12 '18 at 16:15
Like "someone one." – William Nov 12 '18 at 16:15
Well, that wouldn't work anymore obviously – Hammerbot Nov 12 '18 at 16:17
With punctuations I created a large code... It was messy! I took into account all the common punctuation marks like .,!?;: etc. – William Nov 12 '18 at 16:21

score -1 · Answer 3 · answered Nov 12 '18 at 16:13

-1

try this regex:

\s(one)\s

you may add modify it for case sensitive.

answered Nov 12 '18 at 16:13

Subhasish Bhattacharjee

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May i kno the reason for downvote? – Subhasish Bhattacharjee Nov 13 '18 at 07:57

score -1 · Answer 4 · answered Nov 12 '18 at 16:14

-1

let input = "Someone one one-way"
output = input.split(" ").map((item)=> item ==='one'? 'two' : item).join(" ");
console.log(output)

answered Nov 12 '18 at 16:14

Mohammed Ashfaq

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Donat · Answer 5 · 2018-11-12T16:40:08.723

You can try this:

.replace(/\bone\b(?!-)/g , "two")

\b matches on a word boundary.

(?!-) is a negative lookahead because you do not want to replace one if followed by a dash. \b recognizes the dash as a word boundary.

There is another pitfall when you have something like "-one".

Use this if this is a Problem:

.replace(/[^-]\bone\b(?!-)/g , function(x){return x.substring(0,1) + 'two'})

Ideally you would use negative look ahead, but this is currently not supported by all Browsers.

How to replace a word in JavaScript?

5 Answers5