Unverified Commit 206d2042 authored by h7x4's avatar h7x4
Browse files

lib.strings: add `replicate` 



`strings.replicate` returns n copies of a string, concatenated into a new
string

Co-authored-by: default avatarSilvan Mosberger <github@infinisil.com>
parent f320b0d4

lib/strings.nix

+14 −0
Original line number Diff line number Diff line
@@ -144,6 +144,20 @@ rec { 
  */

  concatLines = concatMapStrings (s: s + "\n");



  /*

    Replicate a string n times,

    and concatenate the parts into a new string.



    Type: replicate :: int -> string -> string



    Example:

      replicate 3 "v"

      => "vvv"

      replicate 5 "hello"

      => "hellohellohellohellohello"

  */

  replicate = n: s: concatStrings (lib.lists.replicate n s);



  /* Construct a Unix-style, colon-separated search path consisting of

     the given `subDir` appended to each of the given paths.

lib/tests/misc.nix

+5 −0
Original line number Diff line number Diff line
@@ -191,6 +191,11 @@ runTests { 
    expected = "a\nb\nc\n";

  };



  testReplicateString = {

    expr = strings.replicate 5 "hello";

    expected = "hellohellohellohellohello";

  };



  testSplitStringsSimple = {

    expr = strings.splitString "." "a.b.c.d";

    expected = [ "a" "b" "c" "d" ];