Regex to tokenize a string into array of numeric and alphanumeric strings in scala

Question

I have a few strings for which I want to tokenize

for example:

123ae4rf468 to be split into [123,ae4rf,468] 
878768stb4hgbjh354 to be split into [878768,stb4hgbjh,354]

I tried below but did not work. Kindly, help

 def groupStrings(): Unit ={
    val pattern: Regex = "\"[^A-Z0-9]+|(?<=[A-Z])(?=[0-9])|(?<=[0-9])(?=[A-Z])\"".r
    for(patternMatch <- pattern.findAllMatchIn("12341abc1234"))
      println(patternMatch.groupCount)
  }

Code Maniac · Accepted Answer · 2019-04-15 16:35:09Z

2

You can use this

(^\d+)(.*?)(?<=[a-z])(\d+)$

(^\d+) - Matches digits at start of string
(.+?) - Match anything except new line one or more time
(?<=[a-z])(\d+)$ - Positive lookbehind matches digits preceded by character at end of string

Demo

On side note:- If you don't need groups you can change to this

^\d+.*?(?<=[a-z])\d+$

edited Apr 15, 2019 at 16:35

answered Apr 15, 2019 at 16:22

Code Maniac

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score 0 · Accepted Answer · 2019-04-15 16:23:38Z

0

try this (\d+|\D+)
or (\D+(?:\d*\D)*|\d+)
or (\D+(?:\d*\D+)?|\d+)

edited Apr 15, 2019 at 16:23

answered Apr 15, 2019 at 16:14

user11364325

1 Comment

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