Idiosyncratic Ruby: Ruby has Character
Ruby comes with good support for Unicode-related features. Read on if you want to learn more about important Unicode fundamentals and how to use them in Ruby… …or just watch my talk from RubyConf 2017: ⑩ Unicode Characters You Should Know About as a 👩💻 Ruby ♡ Unicode Characters in Unicode Codepoints & Encodings Grapheme Clusters Normalization Confusables Case-Mapping Case-Folding Regex Unicode
Idiosyncratic Ruby: idiosyncratic_eval
When you get farther upwards the steep hill that is Ruby mastery, you will come across some powerful, yet slightly evil methods: instance_eval and class_eval¹. They allow you to execute code and define methods tied to a specific class, at the same time giving you access to outer scope variables through the Ruby block syntax. Their exact behavior varies, depending on the context they are used in. S
Idiosyncratic Ruby: What the Format?
%a %A %b %B %c %d %e %E %f %g %G %i %o %p %s %u %x %X %% 0 $ # + - * space Ruby comes with a structured alternative to classic string interpolation: This episode will explore format strings, also known as the sprintf syntax. Recall the normal way of interpolating variables into a string: v = 42 "--> #{v} <--" # => "--> 42 <--" Format strings are different in that they use a string template and bin
Idiosyncratic Ruby: Documenting All Ruby Specialities
About Idiosyncratic Ruby Ruby is not only optimized for developer happiness, but also for writing concise one-liners. The language is extremely expressive, but this comes at a price: Ruby's grammar definition is more than 13 000 lines long, the language is at its limits, and there is not a single editor or syntax highlighter which actually highlights Ruby correctly. Idiosyncratic != Bad Ruby is st
Idiosyncratic Ruby: No More Errors
If you don't like errors in your code, you will have to fix them. This handy list of Ruby's errors will hopefully help you do so! (And welcome back for the second season of Idiosyncratic Ruby!) Built-in Exceptions Exception Thrown by core Ruby when Remarks NoMemoryError The Ruby interpreter could not allocate the required memory "Idiosyncratic" * 100_000_000_000 ScriptError - Not thrown directly S
Idiosyncratic Ruby: Golfing Basics
Code Golf is the art of writing the shortest program possible. The less bytes the better. And the competition is just ridiculously strong! Head over to Anarchy Golf if you want to see more! A good beginner's problem is printing out Pascal's Triangle: Spend a few days to get to 45 bytes. Spend a few months to get to 43 bytes! Attention: A new golf course has opened at code.golf. Why not give it a t
Idiosyncratic Ruby: Meta Methodology
Ruby clutters its objects a lot with methods for metaprogramming other methods: Class.instance_methods.grep /method/ => [:instance_methods, :public_instance_methods, :protected_instance_methods, :private_instance_methods, :method_defined?, :public_method_defined?, :private_method_defined?, :protected_method_defined?, :public_class_method, :private_class_method, :instance_method, :public_instance_m
Idiosyncratic Ruby: What the Pack?
a A b B c C d D e E F g G h H l L m m0 M n N p P q Q s S u U v V w x X Z @ ! * < > _ Ruby comes equipped with a powerful option for low level string manipulation: String#unpack and its counter part Array#pack. Today's episode takes a closer look. The general way how String#unpack is used is this: "a string".unpack("pack template with directives") # => [...] The string contains some data in a speci
Idiosyncratic Ruby: Regular Extremism
You are here for a collection of 10 advanced features of regular expressions in Ruby! Regex Conditionals Regular expressions can have embedded conditionals (if-then-else) with (?ref)then|else. "ref" stands for a group reference (number or name of a capture group): # will match everything if string contains "ä", or only match first two chars regex = /(.*ä)?(?(1).*|..)/ "Ruby"[regex] #=> "Ru" "Idios
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GitHub - janlelis/idiosyncratic-ruby.com: Documenting All Ruby Specialities 💎︎
Idiosyncratic Ruby: Try Converting
Idiosyncratic Ruby: R(u)b(y)Config(uration)