ruby Archives - Page 15 of 19

What is the difference between include and extend in Ruby?

Just getting my head around Ruby metaprogramming. The mixin/modules always manage to confuse me. include: mixes in specified module methods as instance methods ...

May 5, 2022
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Ruby: What does ‘require: false’ in Gemfile mean?

Does this: gem 'whenever', require: false mean that the gem needs to be installed, or does it mean it is not required? 6 ...

May 5, 2022
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When to use RSpec let()?

I tend to use before blocks to set instance variables. I then use those variables across my examples. I recently came upon let(). ...

May 4, 2022
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Ruby: Can I write multi-line string with no concatenation?

Is there a way to make this look a little better? conn.exec 'select attr1, attr2, attr3, attr4, attr5, attr6, attr7 ' + 'from ...

May 4, 2022
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Is there a “do … while” loop in Ruby?

I’m using this code to let the user enter in names while the program stores them in an array until they enter an ...

May 4, 2022
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What is Ruby’s double-colon `::`?

What is this double-colon ::? E.g. Foo::Bar. I found a definition: The :: is a unary operator that allows: constants, instance methods and ...

May 4, 2022
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When monkey patching an instance method, can you call the overridden method from the new implementation?

Say I am monkey patching a method in a class, how could I call the overridden method from the overriding method? I.e. Something ...

May 4, 2022
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How to map with index in Ruby?

What is the easiest way to convert [x1, x2, x3, ... , xN] to [[x1, 2], [x2, 3], [x3, 4], ... ,...

May 4, 2022
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How to reverse a ‘rails generate’

I want to delete all the files it created and roll back any changes made, but not necessarily to the database, but more ...

May 3, 2022
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What is the difference between include and require in Ruby?

My question is similar to “What is the difference between include and extend in Ruby?”. What’s the difference between require and include in ...

May 3, 2022
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