Language features, syntax, and gotchas.
Category: Language
Episode #682
682 Is it defined?
Constants, globals, locals, instance variables, methods... Ruby has a lot of namespaces. Let's learn about a Ruby power tool for reflecting on these names no matter what space they come …
Episode #681
Setter Return
A surprising Rubocop warning inspired this video about an obscure bit of Ruby semantics. Find out why you never need to worry about return values in Ruby setter methods!
Episode #680
Hash Splat Merge
In today's video, learn a concise and expressive syntax for merging several Ruby hashes into one!
Episode #678
Module Prepend
Sometimes you need to attach new functionality, such as logging, to other people's code. Learn to leverage Ruby's ancestor chain for (relatively) clean patching, using prepended modules!
Episode #652
Null-Terminated Record
Before YAML, before JSON, there were null-terminated records. See how this simple, pragmatic technique greases the pipes between UNIX command-line tools---and how you can harness it in your Ruby one-liners!
Episode #648
Output Record Separator
Did you know Ruby has a `print` method in addition to `puts`? Did you know it's for record-oriented output? Do you know how to control the formatting of records in …
Episode #645
Grep, Sort, Uniq
As we continue exploring Ruby one-liner alternatives to UNIX command-line operations, today we tackle a common case: a combination of grepping through multiple files, and collating the results.
Episode #642
Line Ending Processing Mode
Want line terminators in input text to just Go Away? Ruby has a mode for that!
Episode #640
Autosplit
Ruby has tools like -n and -p for filtering and summarizing text right from the command-line. But what about columnar input, like process listings or CSV? Today we'll see how …