<?xml version="1.0" encoding="UTF-8"?><rss version="2.0"><channel><title>The Prepshotz blog</title><link>https://prepshotz.com/blog/</link><description>Coding errors explained, with code you can run in your browser.</description><language>en</language><item><title>Array index out of bounds in C: find the line that does it</title><link>https://prepshotz.com/blog/array-index-out-of-bounds-in-c/</link><guid>https://prepshotz.com/blog/array-index-out-of-bounds-in-c/</guid><pubDate>Wed, 07 Oct 2026 00:00:00 GMT</pubDate><description>C lets you read past the end of an array without a word. Here is why, what the bug looks like, and how to make the compiler name the exact line.</description></item><item><title>Column must appear in the GROUP BY clause: what SQL is asking</title><link>https://prepshotz.com/blog/column-must-appear-in-the-group-by-clause/</link><guid>https://prepshotz.com/blog/column-must-appear-in-the-group-by-clause/</guid><pubDate>Wed, 07 Oct 2026 00:00:00 GMT</pubDate><description>Why SQL refuses a column that is neither grouped nor aggregated, the three ways to fix it, and the one that changes your answer. Run every query here.</description></item><item><title>IndexError: list index out of range in Python, and how to fix it</title><link>https://prepshotz.com/blog/indexerror-list-index-out-of-range-python/</link><guid>https://prepshotz.com/blog/indexerror-list-index-out-of-range-python/</guid><pubDate>Wed, 07 Oct 2026 00:00:00 GMT</pubDate><description>What Python's most common list error means, the four mistakes that cause it, and the fix for each, with examples you can run in your browser.</description></item></channel></rss>