How to replace consecutive non alphanumeric values with _

Asked Jan 08 '19 at 10:06

Active Jan 08 '19 at 10:08

Viewed 38 times

I have a string like

aaa:::sss vvv ggg 4 SF 20 @text box2323

and i want to replace all non alphanumeric characters with single underscore. Like this :

aaa_sss_vvv_ggg_4_SF_20_text_box2323

What i tried so far is :

let nameRegex = new RegExp("[^a-zA-Z0-9_]","g");
let originalName="aaa:::sss vvv ggg 4 SF 20 @text box2323";
let finalName= originalName.toLowerCase().replace(nameRegex, "_");
console.log(finalName);

but what i am getting is :

aaa___sss_vvv_ggg_4_SF_20__text_box2323

As you can see i am getting 3 underscores at first replacement. I want single here.

Any help will be appricitated.

edited Jan 08 '19 at 10:08

asked Jan 08 '19 at 10:06

Amit Kumar

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Remove `*` quantifier and use `+` instead. – revo Jan 08 '19 at 10:07
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Use `let nameRegex = /[^a-zA-Z0-9_]+/g`, see https://regex101.com/r/jmsFwN/1 – Wiktor Stribiżew Jan 08 '19 at 10:09
1

tried in regex101, replacing `[^a-zA-Z0-9_]+` (or simply `\W+`) with `_` should work. (However, your original regex is going insert `_` between each alphabet, seems not aligned with what you observed) – Adrian Shum Jan 08 '19 at 10:11
@AdrianShum , on regexr its working fine but in code i am getting same as originalName with no changes – Amit Kumar Jan 08 '19 at 10:19
Sorry, my mistake, its working – Amit Kumar Jan 08 '19 at 10:25

How to replace consecutive non alphanumeric values with _

0 Answers0