Do..End v.s Braces

README.md

What's difference between braces and do..end

Actually, there're no so big difference. But the priority is difference. We can check an example out as below then we can understand.

my_array = [1, 2, 3, 4, 5]

# <1>
p my_array.map { |item|
  item * 2
}
# >> [2, 4, 6, 8, 10]

# <2>
p my_array.map do |item|
  item * 2
end
# >> #<Enumerator: [1, 2, 3, 4, 5]:map>

Why?

The interpreter will check as like.

First <1>

p(my_array.map do |item| item * 2 end)

Second <2>

p(my_array.map) do |item| item * 2 end

Idoms

Most of people said

• braces {} is used in SINGLE LINE.
• do..end is used in MULTI LINE.