CODEWITHSUNDEEP
regex
Ranjith
Ranjith

Reputation: 125

Regex to match a string containing as many digits as letters

I am trying to create a regex to match a string with the following criterion:

  1. the string must contain an even number of chars
  2. the string must contain as many digits as letters

Should match:

I tried, but didn't get a solution. Can you help me out?

Upvotes: 3

Views: 130

Answers (2)

sp00m
sp00m

Reputation: 48817

If the programming language you're using supports regex subroutines, then the following one should suit your needs:

^([A-Z](?1)*[0-9]|[0-9](?1)*[A-Z])+$

Regular expression visualization

Visualization by Debuggex

Demo on regex101

Upvotes: 4

Sly
Sly

Reputation: 361

using regexp to keep only letters or only numbers and comparing them : (example in javascript)

var str = 'A34DF5';
var result = str.replace(/[^a-z]/gi,'').length == str.replace(/[^0-9]/gi,'').length ;

Upvotes: 2

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