Split nested block parameters - makandra dev

If you iterate over a collection of arrays, you can destructure the arrays within the block parameters:

movies_and_directors = [
  ['The Big Lebowski', 'Coen Brothers'],
  ['Fight Club', 'David Fincher']
]
movies_and_directors.each do |movie, director|
  # do something
end

For nested array (e.g. when you use each_with_index), you can use parentheses for destructuring:

movies_and_directors.each_with_index do |(movie, director), index|
  # do something
end

Tobias Kraze

Last edit

Over 13 years ago

Keywords

assignment

License

Source code in this card is licensed under the MIT License.

Nested Spreewald patiently blocks are now patient

In Spreewald 1.10.4+, nested patiently blocks are now patient.

Here is an example:

patiently do
  outer_code
  patiently do
    inner_code
  end
end

On spreewald 1.11.2+ the inner block will wait for the full configured wait time ...

Ruby blocks: Braces and do/end have different precedence

TL;DR {} binds stronger than do … end (as always in Ruby, special characters bind stronger than words)

Demo

Right way

names = ['bRUce', 'STaN', 'JOlIE']

# Blocks in braces are passed to the rightmost method
print names.m...

Posted by Tobias Kraze to makandra dev (2010-09-09 15:34)