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Issue 8152 - Reduce number of attribute set created by replaceChars.

This commit is contained in:
Nicolas B. Pierron 2015-07-13 23:46:38 +02:00
parent 74f4b0d27a
commit be65ac7c32
1 changed files with 6 additions and 4 deletions
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10
lib/strings.nix
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@ -107,11 +107,13 @@ rec {
# replaceChars ["<" ">"] ["&lt;" "&gt;"] "<foo>" returns "&lt;foo&gt;". # replaceChars ["<" ">"] ["&lt;" "&gt;"] "<foo>" returns "&lt;foo&gt;".
replaceChars = del: new: s: replaceChars = del: new: s:
let let
substList = lib.zipLists del new;
subst = c: subst = c:
(lib.fold let found = lib.findFirst (sub: sub.fst == c) null substList; in
(sub: res: if sub.fst == c then sub else res) if found == null then
{fst = c; snd = c;} (lib.zipLists del new) c
).snd; else
found.snd;
in in
stringAsChars subst s; stringAsChars subst s;