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danbst 2019-08-05 14:34:51 +03:00
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nixos/doc/manual/release-notes/rl-1909.xml
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@ -387,6 +387,18 @@
installer after creating <literal>/var/lib/nextcloud</literal>. installer after creating <literal>/var/lib/nextcloud</literal>.
</para> </para>
</listitem> </listitem>
<listitem>
<para>
There exists now <literal>lib.forEach</literal>, which is like <literal>map</literal>, but with
arguments flipped. When mapping function body spans many lines (or has nested
<literal>map</literal>s), it is often hard to follow which list is modified.
</para>
<para>
Previous solution to this problem was either to use <literal>lib.flip map</literal>
idiom or extract that anonymous mapping function to a named one. Both can still be used
but <literal>lib.forEach</literal> is preferred over <literal>lib.flip map</literal>.
</para>
</listitem>
</itemizedlist> </itemizedlist>
</section> </section>
</section> </section>