Easy Category Ruby Questions

Question 1

What is (&:to_i) shorthand for?

Answer 1

something.map { |char| char.to_i }

Question 2

Explain method unshift and which class it modifies

Answer 2

unshift(obj, ...) → ary
Prepends objects to the front of self, moving other elements upwards. Use on class Array#prepend or Array#unshift

https://ruby-doc.org/core-2.5.0/Array.html#method-i-unshift

Question 3

What does the method divmod do and to which class does it apply?

Answer 3

divmod(numeric) → array
Returns an array containing the quotient and modulus obtained by dividing num by numeric. Class: Numeric

https://ruby-doc.org/core-2.5.3/Numeric.html#method-i-divmod