Apply a callback to an array: Difference between revisions
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{{task}}
Apply a [[callback function]] to each element of an Array
==[[Ruby]]==▼
#create the array▼
ary = [1,2,3,4,5]▼
#create the function (print the square)▼
def print_square(i)▼
puts i**2▼
end▼
#ruby▼
ary.each do |i|▼
print_square(i)▼
end▼
# prints 1,4,9,16,25▼
# Alternatively:▼
[1,2,3,4,5].each { |i| puts i**2 }▼
==[[C++]]==
'''Compiler:''' [[GNU Compiler Collection]]
Using [[c-style array]]
#include <iostream> //cout for printing
Line 40 ⟶ 25:
//prints 1 4 9 16 25
Using [[std]]::[[std::vector|vector]]
#include <iostream> //cout for printing
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squares1 = [square(n) for n in numbers] # list comprehension
squares2 = map(square, numbers)
▲==[[Ruby]]==
▲ #create the array
▲ ary = [1,2,3,4,5]
▲ #create the function (print the square)
▲ def print_square(i)
▲ puts i**2
▲ end
▲ #ruby
▲ ary.each do |i|
▲ print_square(i)
▲ end
▲ # prints 1,4,9,16,25
▲ # Alternatively:
▲ [1,2,3,4,5].each { |i| puts i**2 }
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