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    <p>Since a counter based solution seems to still may have some shortcomings depending on possible use-cases (beside the hack-based counter thing itself, see my <a href="https://stackoverflow.com/a/20199775/2712740">comment</a> to the corresponding answer) I decided to post a list/loop-based solution I mentioned earlier. I keep the code here as close as possible to the counter-based one so they could be easily compared. (But in general all could be made much clean, structured and generic with further polishing by renaming and reordering all those namespaces/selectors/mixins/variables, removing unnecessary quotes etc.).</p> <h2>Opt. 1</h2> <p>When you need only arbitrary icon(s) of the sprite to have its class in the CSS output:</p> <pre class="lang-css prettyprint-override"><code>@row: 1; // ...... .my-icon-bundle { .myIcon(@row, @index) { @x: (@row * @index); @y: (@row * @index); background-position: -@x -@y; } .myIconX(@name) { @icons: "classX1", "classYY1", "classZZZ", "anotheRR9", "etc."; .find(1); .find(@i) when (@name = extract(@icons, @i)) { @name_: e(@name); .my-icon-@{name_} { #my-icon-bundle.myIcon(@row, @i); } } .find(@i) when not (@name = extract(@icons, @i)) { .find((@i + 1)); } } } // ...... // usage: #my-icon-bundle.myIconX("anotheRR9"); #my-icon-bundle.myIconX("classX1"); </code></pre> <h2>Opt. 2</h2> <p>When you just need to generate corresponding classes for all icons in the sprite:</p> <pre class="lang-css prettyprint-override"><code>@row: 1; // ...... #my-icon-bundle { .myIcon(@row, @index) { @x: (@row * @index); @y: (@row * @index); background-position: -@x -@y; } .icons() { @icons: "classX1", "classYY1", "classZZZ", "anotheRR9", "etc."; .make(length(@icons)); .make(@i) when (@i &gt; 0) { .make((@i - 1)); @name_: e(extract(@icons, @i)); .my-icon-@{name_} { #my-icon-bundle.myIcon(@row, @i); } } } } // ...... // usage: #my-icon-bundle.icons(); </code></pre> <hr> <p>P.S. All this is for LESS 1.5.x, I'm too lazy to make it compatible with earlier versions - sorry.</p>
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