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Add replaceStrings primop

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This is a generalisation of replaceChars in Nixpkgs.
This commit is contained in:
Eelco Dolstra 2015-07-24 15:32:24 +02:00
parent 2e8fd4c5cd
commit d6d5885c15
4 changed files with 63 additions and 1 deletions
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17
doc/manual/expressions/builtins.xml
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@ -733,6 +733,23 @@ removeAttrs { x = 1; y = 2; z = 3; } [ "a" "x" "z" ]</programlisting>
</varlistentry>
<varlistentry><term><function>builtins.replaceStrings</function>
<replaceable>from</replaceable> <replaceable>to</replaceable> <replaceable>s</replaceable></term>
<listitem><para>Given string <replaceable>s</replaceable>, replace
every occurrence of the strings in <replaceable>from</replaceable>
with the corresponding string in
<replaceable>to</replaceable>. For example,
<programlisting>
builtins.replaceStrings ["oo" "a"] ["a" "i"] "foobar"
</programlisting>
evaluates to <literal>"fabir"</literal>.</para></listitem>
</varlistentry>
<varlistentry><term><function>builtins.seq</function>
<replaceable>e1</replaceable> <replaceable>e2</replaceable></term>