Rakudo lately got an interesting change. Consider following buggy code (for array binary search), written in functional style (I’m using recursion). The bug is that it doesn’t work because of two different identifiers binary-search and binary_search.
Trying to run it shows compile time error message. The compile part is important. If you would remove binary-search call at end, it still would report an error, unlike Python.
===SORRY!===
Undeclared routine:
binary_search used at lines 2, 8, 9. Did you mean '&binary-search'?Now you know what’s wrong and you can easily fix it. Unlike let’s say, Jekyll that I use for my blog. Not only it doesn’t work on my PC for some reason, but also refused to highlight my code - it gave some sort of XML error (it simply said “REXML could not parse this XML/HTML”). I gave up and put it on Gist. And the first attempt was failed, because embed code is <script> and Jekyll self-closed the tag (XML-style, but this is HTML). This is annoying.