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POC# algorithm refactor splitting an array into 3 parts?
 

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  1. POC# algorithm refactor splitting an array into 3 parts?
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    <p>I have an IEnumerable and I wanted to split the data across 3 columns using the following business logic. if 3 or less items, 1 item per column, anything else I wanted to divide the total items by 3 split the leftovers (either 1 or 2 items) between the first two columns. Now this is pretty ugly but it does the job. I'm looking for tips to leverage linq a little better or possibly eliminate the switch statement. Any advice or tips that improve the code are appreciated.</p> <pre><code>var numItems = items.Count; IEnumerable&lt;JToken&gt; col1Items, col2Items, col3Items; if(numItems &lt;=3) { col1Items = items.Take(1); col2Items = items.Skip(1).Take(1); col3Items = items.Skip(2).Take(1); } else { int remainder = numItems % 3, take = numItems / 3, col1Take, col2Take, col3Take; switch(remainder) { case 1: col1Take = take + 1; col2Take = take; col3Take = take; break; case 2: col1Take = take + 1; col2Take = take + 1; col3Take = take; break; default: col1Take = take; col2Take = take; col3Take = take; break; } col1Items = items.Take(col1Take); col2Items = items.Skip(col1Take).Take(col2Take); col3Items = items.Skip(col1Take + col2Take).Take(col3Take); </code></pre> <p>Ultimately I am using these in a mvc Razor view</p> <pre><code>&lt;div class="widgetColumn"&gt; @Html.DisplayFor(m =&gt; col1Items, "MenuColumn") &lt;/div&gt; &lt;div class="widgetColumn"&gt; @Html.DisplayFor(m =&gt; col2Items, "MenuColumn") &lt;/div&gt; &lt;div class="widgetColumn"&gt; @Html.DisplayFor(m =&gt; col3Items, "MenuColumn") &lt;/div&gt; </code></pre> <p>In my first attempt I want to get rid of the colNItems and colNTake variables but i can't figure out the correct algorithm to make it work the same.</p> <pre><code>for (int i = 1; i &lt;= 3; i++ ) { IEnumerable&lt;JToken&gt; widgets = new List&lt;JToken&gt;(); var col = i; switch(col) { case 1: break; case 2: break; case 3: break; } } </code></pre>
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    1. COThis question is probably a better fit for http://codereview.stackexchange.com/
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    2. COThink recursive! the leftover rule is in principle the same as the 'lesser than 3' rule which in turn is similar to divide rule
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