Tag: Perl

Here is why should you want to know about so called “Fizz Buzz”: it is mystifying!.. No, not really, at least not if you know how to program. Simple put that is one of most common requests to write a sample code while interviewing for a programming job. As quoted on c2.com the “Fizz Buzz” request might be formulated as following:

“Write a program that prints the numbers from 1 to 100. But for multiples of three print “Fizz” instead of the number and for the multiples of five print “Buzz”. For numbers which are multiples of both three and five print “FizzBuzz”.”

As we are getting more and more acquainted with a valuable flow of free financial information provided generously by a company called Alpha Vantage, we will now come up with a Perl script that would facilitate data extraction from their feed. The abovementioned service is free, but you have to register to obtain your individual API key. For obvious reasons we will use a demo API key in our Perl code examples here. We recommend you to get your own.

When you write a Perl application with Mojolicious framework, you put tests into the t directory. Then it is very easy to run them because Mojolicious supports tests “out of the box” with test command that should run all tests one by one:

The Archive-Zip Perl module introduced as early as January 2001, then supported by several maintainers with regular updates. Most of the time Archive-Zip is alright, but there are limitations. 2016 is about to be over and the Archive-Zip still does not know how to handle newer “64bit” header ZIP format. Not only it cannot read them 64bit ZIPs; alas, it would not create those, also. With older “32bit” header ZIP archives compressing larger amount of data files presents a bigger challenge than it should. Yes, you might use a different compression format or technique. But what if we must stick with the good old ZIP file as our standard? Here is a recipe on how to handle that.

Just some random thoughts on a napkin. Please do not shoot the messenger, but Perl would gain a lot in readability if it had reduced even more some of its generic constructs with better use of unambiguous context. For instance, who is in favor of a separate context type for hash arrays (associative arrays usually defined as %hasharrayname), please raise your hands.

First Perl recipe here, to our best knowledge. The idea is very simple and obvious: using random function rand for randomly ordering values inside a sort pipeline. It could be used for any Perl lists or arrays random ordering, though we decided to sort hash array keys (as we tend to use that a lot in a form of hash array references).