Here we will cover the differences and use cases for Array#each, Array#map, and Array#select. What is the difference? Array#each is used for iteration. #each is preferred by Rubyists in place of using a for loop. …

The following article will attempt to thoroughly and precisely explain how the following code snippets work: ["Aa", "AAA", "b", "aa", "Aaa"].sort [100, 77, 200, 7, 21].sort When sorting Strings, Array#sort uses the return value of the combined comparison operator (also known as the spaceship operator) String#<=> and the ASCII (hexadecimal)…

Methods that call a block repeatedly are called iterator methods. Iterating through Arrays with #each #each when used on an array passes a single parameter to the block. Suppose we have an array of days of the week, and we want to loop through, capitalize and output each day of the week. week = […

Starting from the basics: A single line block: { p "example string" } Multi-line block: do p "example string" end A block cannot be run directly, instead the block needs to be associated with or attached to a method call: # Single line example: 2.times(method_param) { puts "example string" } …

Markdown is lightweight markup language that is used in plaintext documents to add forming elements. Writing in markdown is slightly different than using a WYSIWYG editor. Markdown doesn’t immediately show the changes to the document as you press buttons like “Bold”, instead with markdown you annotate the formatting you wish…

How local variables interact with method invocations, blocks, and method definitions. What types of variables does Ruby have? For the purpose of this article, a variable is just a label. It gives you, the programmer, the ability to name an object in your code. Ruby has several types of variables, all defined by where they are accessible…

Combining the Two Layer Approach and PEDAC Framework to Solve Programming Problems Launch School, where I attend Software Engineering School, talks extensively about when you start out as a programmer that there are two layers to every problem: Layer 1.) The logic layer Layer 2.) The language syntax layer The…