Is there a simple way to intersect two strings? I did not find anything about that.

intersect["abcdEfgh","blahcdEzz"] (* "cdE" *)

By intersection, I mean the longest substring(s) that is(are) common to both strings.

  • 4
    $\begingroup$ reference.wolfram.com/language/ref/… $\endgroup$
    – V.E.
    Dec 16, 2017 at 23:31
  • $\begingroup$ @V.E. Perfect. Feel free to write an answer for completeness... $\endgroup$
    – anderstood
    Dec 16, 2017 at 23:36
  • $\begingroup$ Just one click on V.E.'s hint gives the answer... $\endgroup$ Dec 17, 2017 at 12:34
  • $\begingroup$ @UlrichNeumann Turning the comment into an answer allows me to accept it, and hence remove this question for the unanswered list. $\endgroup$
    – anderstood
    Dec 17, 2017 at 13:05
  • $\begingroup$ @ anderstood: I got it! $\endgroup$ Dec 17, 2017 at 13:28

1 Answer 1


As porposed by @V.E. you should use LongestCommonSubsequence[s1,s2]. Example from the documentation:

LongestCommonSubsequence[ "AAABBBBCCCCC", "CCCBBBAAABABA"]
(* AAAB *)

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