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  1. import java.util.*
  2.  
  3. fun main(args: Array<String>) {
  4.     val string = "field1:1234,field2:[[1, 3],[3,4]], field3:[[1, 3],[3,4]]"
  5.     val rx = """\w+:(?:(?=\[)(?:(?=.*?\[(?!.*?\1)(.*\](?!.*\2).*))(?=.*?\](?!.*?\2)(.*)).)+?.*?(?=\1)[^\[]*(?=\2$)|\w+)""".toRegex()
  6.     print( rx.findAll(string).map{it.value}.joinToString("\n") )
  7. }
Success #stdin #stdout 0.13s 40636KB
comments (?)
stdin 
Standard input is empty
stdout 
field1:1234
field2:[[1, 3],[3,4]]
field3:[[1, 3],[3,4]]
https://ideone.com/p9WIYE
language:
Kotlin (kotlin 1.3.21)
created:
3 years ago
visibility:
secret

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