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POWhat are your tips for keeping track and avoiding bugs in loops?
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  1. POWhat are your tips for keeping track and avoiding bugs in loops?
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    copied!<p>I just found ... AGAIN ... a real time wastage bug as follows</p> <pre><code>for (int i = 0; i &lt; length; i++) { //...Lots of code for (int j = 0; i &lt; length; j++) { //...Lots of code } } </code></pre> <p>Did you notice straight ahead the inner i which SHOULD BE j ? Neither did I. So from now on I am going to use: </p> <pre><code>for (int i = 0; i &lt; length; i++) { for (int i1 = 0; i1 &lt; length; i1++) { } } </code></pre> <p>What are your tips for inner and outer while and for loops ?</p> <p>Edit: Thanks for the valuable responses. Herewith short summary of the proposed tips:</p> <ul> <li>use meaningful variables names for index variables ( instead i use SomeObjCollectionLength )</li> <li>place the contents of the inner loop into a separate method and call that method from the outer loop </li> <li>not manageable amount of lines of code between the outer and inner loop is a strong signal for code smell</li> <li>avoid copy pasting and rushing , write the index vars with care </li> </ul> <p>You might want to check the summary by <a href="https://stackoverflow.com/users/91671/lbushkin">LBushkin</a> for the <a href="https://stackoverflow.com/questions/1011712/what-are-your-tips-for-keeping-track-and-avoiding-bugs-in-loops/1015064#1015064">following</a></p> <ul> <li>use foreach and iterators whenever possible </li> <li>initialize the variables just before entering the loops</li> <li>Make each loop perform only one function. Avoid mixing responsibilities in a single loop</li> <li>When possible, make your loops short enough to view all at once</li> </ul>
 

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