Regex - Remove a value from a string using Javascript/Regex

Question

I've a text variable in the following format -

value1|34|value2|45|value3|67|value4|687|

Now I just have the text 'value3' with me and I've to remove that value along with its associated number from the above string. After removing it I've to get -

value1|34|value2|45|value4|687|

Note: The numbers in the pipelines are prefixed with its value string. Ex - Value|56|. So if I've to remove a value I've to remove it along with its number.

score 2 · Answer 1 · answered Jun 21 '12 at 13:07

2

It looks like you could benefit from using something like JSON as a storage format instead.

'value1|34|value2|45|value3|67|value4|687|'.replace(/value3\|\d+\|/,'')

answered Jun 21 '12 at 13:07

Wivlaro

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Mathias Bynens · Answer 2 · 2012-06-21T13:15:21.620

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var input = 'value1|34|value2|45|value3|67|value4|687|',
    remove = 'value3',
    result = input.replace(RegExp(remove + '\\|\\d+\\|'), '');
console.log(result); // 'value1|34|value2|45|value4|687|'

edited Jun 21 '12 at 13:15

answered Jun 21 '12 at 13:05

Mathias Bynens

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Not working :(. I'm still getting the same original string after replacing it. – NLV Jun 21 '12 at 13:12
If the value has some special character like this - "Test: (Has- Characters)" it is not working. I'm not able to figure out which of the character is causing the issue. – NLV Jun 21 '12 at 13:59
I guess parentheses () is causing the issue. How to fix it? – NLV Jun 21 '12 at 14:03
Replace `\d` (which only matches digits) with a character class that would match everything you want to match, e.g. `[0-9a-zA-Z\(\)\s-]`, or simply use `[^|]`. – Mathias Bynens Jun 21 '12 at 16:35

Alex K. · Accepted Answer · 2012-06-21T14:27:57.390

1

You can

var s = "value1|34|value2|45|value3|0000|value4|687|";
var r = "value3";

s = s.replace(new RegExp("(?:^|\\|)" + r + "\\|\\d+"), "")

Includes start-guard (wont match xxxvalue3)

edited Jun 21 '12 at 14:27

answered Jun 21 '12 at 13:11

Alex K.

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This is removing the pipeline before the value. For example, after you remove value3 I'm getting - value1|34|value2|45value4|687| – NLV Jun 21 '12 at 13:34
If the value has some special character like this - "Test: (Has- Characters)" it is not working. I'm not able to figure out which of the character is causing the issue. – NLV Jun 21 '12 at 14:00
I guess parentheses () is causing the issue. How to fix it? – NLV Jun 21 '12 at 14:03
Changed re; to use a string that contain characters that form part of re syntax you must escape it; http://stackoverflow.com/questions/3446170/escape-string-for-use-in-javascript-regex – Alex K. Jun 21 '12 at 14:28

Regex - Remove a value from a string using Javascript/Regex

3 Answers3