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nixpkgs docs: document zipAttrs

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Graham Christensen 2018-10-12 16:31:23 -04:00
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doc/functions/library/attrsets.xml
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@ -1452,7 +1452,8 @@ lib.attrsets.zipAttrsWithNames
<para>
Merge sets of attributes and use the function <varname>f</varname> to merge
attribute values. Similar to <xref
attribute values. Similar to
<xref
linkend="function-library-lib.attrsets.zipAttrsWithNames" /> where
all key names are passed for <varname>names</varname>.
</para>
@ -1520,4 +1521,46 @@ lib.attrsets.zipAttrsWith
]]></programlisting>
</example>
</section>
<section xml:id="function-library-lib.attrsets.zipAttrs">
<title><function>lib.attrsets.zipAttrs</function></title>
<subtitle><literal>zipAttrsWith :: [ AttrSet ] -> AttrSet</literal>
</subtitle>
<xi:include href="./locations.xml" xpointer="lib.attrsets.zipAttrs" />
<para>
Merge sets of attributes and combine each attribute value in to a list.
Similar to <xref linkend="function-library-lib.attrsets.zipAttrsWith" />
where the merge function returns a list of all values.
</para>
<variablelist>
<varlistentry>
<term>
<varname>sets</varname>
</term>
<listitem>
<para>
A list of attribute sets to zip together.
</para>
</listitem>
</varlistentry>
</variablelist>
<example xml:id="function-library-lib.attrsets.zipAttrs-example">
<title>Combining a list of attribute sets</title>
<programlisting><![CDATA[
lib.attrsets.zipAttrs
[
{ a = 1; b = 1; c = 1; }
{ a = 10; }
{ b = 100; }
{ c = 1000; }
]
=> { a = [ 1 10 ]; b = [ 1 100 ]; c = [ 1 1000 ]; }
]]></programlisting>
</example>
</section>
</section>