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Pastable version of Generating a string of random characters

<div style="overflow:auto;border:solid 1px #ccc;background:#000;color:#F8F8F8"> <div class="section"> <pre style="float:left;margin:0 10px;border-right:0;color:#666;">1 2 3 4 5 6 7 8</pre> <pre class="sunburst">alphanumerics <span style="color:#E28964;">=</span> [<span style="color:#E28964;">*</span>(<span style="color:#65B042;"><span style="color:#65B042;">'</span>0<span style="color:#65B042;">'</span></span>..<span style="color:#65B042;"><span style="color:#65B042;">'</span>9<span style="color:#65B042;">'</span></span>)] <span style="color:#E28964;">+</span> [<span style="color:#E28964;">*</span>(<span style="color:#65B042;"><span style="color:#65B042;">'</span>A<span style="color:#65B042;">'</span></span>..<span style="color:#65B042;"><span style="color:#65B042;">'</span>Z<span style="color:#65B042;">'</span></span>)] <span style="color:#E28964;">+</span> [<span style="color:#E28964;">*</span>(<span style="color:#65B042;"><span style="color:#65B042;">'</span>a<span style="color:#65B042;">'</span></span>..<span style="color:#65B042;"><span style="color:#65B042;">'</span>z<span style="color:#65B042;">'</span></span>)] (<span style="color:#3387CC;">0</span>...<span style="color:#3387CC;">25</span>).<span style="color:#89BDFF;">map</span> { alphanumerics[<span style="color:#9B859D;">Kernel</span>.<span style="color:#89BDFF;">rand</span>(alphanumerics.<span style="color:#89BDFF;">size</span>)] }.<span style="color:#89BDFF;">join</span> alphanumerics <span style="color:#E28964;">=</span> [(<span style="color:#65B042;"><span style="color:#65B042;">'</span>0<span style="color:#65B042;">'</span></span>..<span style="color:#65B042;"><span style="color:#65B042;">'</span>9<span style="color:#65B042;">'</span></span>),(<span style="color:#65B042;"><span style="color:#65B042;">'</span>A<span style="color:#65B042;">'</span></span>..<span style="color:#65B042;"><span style="color:#65B042;">'</span>Z<span style="color:#65B042;">'</span></span>),(<span style="color:#65B042;"><span style="color:#65B042;">'</span>a<span style="color:#65B042;">'</span></span>..<span style="color:#65B042;"><span style="color:#65B042;">'</span>z<span style="color:#65B042;">'</span></span>)].<span style="color:#89BDFF;">map</span> {|<span style="color:#3E87E3;">range</span>| range.<span style="color:#89BDFF;">to_a</span>}.<span style="color:#89BDFF;">flatten</span> (<span style="color:#3387CC;">0</span>...<span style="color:#3387CC;">25</span>).<span style="color:#89BDFF;">map</span> { alphanumerics[<span style="color:#9B859D;">Kernel</span>.<span style="color:#89BDFF;">rand</span>(alphanumerics.<span style="color:#89BDFF;">size</span>)] }.<span style="color:#89BDFF;">join</span> alphanumerics <span style="color:#E28964;">=</span> (<span style="color:#65B042;"><span style="color:#65B042;">'</span>0<span style="color:#65B042;">'</span></span>..<span style="color:#65B042;"><span style="color:#65B042;">'</span>9<span style="color:#65B042;">'</span></span>).<span style="color:#89BDFF;">to_a</span> <span style="color:#E28964;">+</span> (<span style="color:#65B042;"><span style="color:#65B042;">'</span>A<span style="color:#65B042;">'</span></span>..<span style="color:#65B042;"><span style="color:#65B042;">'</span>Z<span style="color:#65B042;">'</span></span>).<span style="color:#89BDFF;">to_a</span> <span style="color:#E28964;">+</span> (<span style="color:#65B042;"><span style="color:#65B042;">'</span>a<span style="color:#65B042;">'</span></span>..<span style="color:#65B042;"><span style="color:#65B042;">'</span>z<span style="color:#65B042;">'</span></span>).<span style="color:#89BDFF;">to_a</span> (<span style="color:#3387CC;">0</span>...<span style="color:#3387CC;">25</span>).<span style="color:#89BDFF;">map</span> { alphanumerics[<span style="color:#9B859D;">Kernel</span>.<span style="color:#89BDFF;">rand</span>(alphanumerics.<span style="color:#89BDFF;">size</span>)] }.<span style="color:#89BDFF;">join</span> </pre> </div> </div> <a href="http://www.refactormycode.com/codes/348-generating-a-string-of-random-characters" style="color:#fff" title="As seen on RefactorMyCode.com"><img alt="Small_logo" src="http://www.refactormycode.com/images/small_logo.gif" style="border:0" /></a>