January 12, 2017 by Daniel P. Clark

Re: What is the splat operator doing here?

I’ve received an email from a fellow software developer inquiring about a bit of code where I use Ruby’s splat operator in two different ways.  In my Ruby gem cards_lib I wrote a “macro” to take a list of strings and generate card instances from them.  You don’t really hear of macros in the Ruby community…

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December 12, 2015 by Daniel P. Clark

Ruby: Arrays by Example

Arrays are Ruby’s most used collection type.  I will use very little description as I give examples for the many different ways to work with Arrays. Different ways to create an empty Array

Filling an Array

Insertion

Boolean/Truthiness

Transformations

Slicing

Adding

Replace & Remove

Selecting

Mapping…

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March 26, 2015 by Daniel P. Clark

Different Collection Types in Ruby

In computer science, a collection or container is a grouping of some variable number of data items (possibly zero) that have some shared significance to the problem being solved and need to be operated upon together in some controlled fashion. – Wikipedia In Ruby the most common collection types used are known as Array and…

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February 4, 2015 by Daniel P. Clark

Using Ruby Object Type Classes to Safely Build Data

When building collections of data you will find situations where the types aren’t what you planned to work with.  And when I say types I’m speaking generically of arrays, hashes, strings, integers, nil, etc.  Everything’s cosy when you know what your getting.  For example putting 10 integers into an Array:

But if you want…

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