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The Perl until loop examples and syntax

Perl until loop FAQ: Can you share some examples of the Perl until loop syntax?

The Perl until loop is similar to the Perl while loop, but essentially does the opposite thing. Where the Perl while operator will run this loop forever:

while ('true')
{
  # do stuff here
}

the Perl until loop will never run this loop:

By Alvin Alexander on February 18, 2013

The Ruby ternary operator syntax

Here's a quick example of some Ruby source code, showing how I used Ruby's ternary operator in a method that prints a CSV record for a class I defined:

By Alvin Alexander on August 30, 2011

Perl - how to search a list of numbers with the grep function

In a previous tutorial I demonstrated how you can search a Perl list/array of strings for another string, or a regular expression using Perl's grep function. In this example I'll demonstrate how you can search a list of numbers very easily, also using Perl's grep function.

By Alvin Alexander on August 30, 2011

Perl true and false - What is true and false in Perl?

Perl true - false FAQ: What is true in Perl? What is false in Perl?

The Perl programming language is a little unusual in not having true and false boolean operators. Because of this -- and my advancing age -- I can never seem to remember what equates to true and false in Perl, so I decided to create this page.

Perl true false summary

In short, the following elements evalue to false in Perl:

By Alvin Alexander on February 2, 2013
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