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(RUBY) Array as argument list
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(RUBY) Array as argument list
You may already know that you can use the splat operator followed by an array to define a list of arguments. That's helpful if you have a method that works with any number of arguments:
But, it also works the other way round. Imagine, you have an array structured like this
and a method like this
You can easily use the array without intermediate steps like so
Happy Programming
- Code: Select all
def sum *args
sum = 0
args.each do |n|
sum += n
end
return sum
end
sum 1, 2, 3, 4, 5, 6
#returns 21
But, it also works the other way round. Imagine, you have an array structured like this
- Code: Select all
myArray = [x, y, z, x, y, z, x, y, z]
and a method like this
- Code: Select all
def translate x, y, z
n = x * z + y * z
#do cool stuff
end
You can easily use the array without intermediate steps like so
- Code: Select all
translate *myArray[0..2]
#takes the first 3 elements of myArray and passes them as arguments
Happy Programming
"There lies the dog buried" (German saying translated literally)
- tulamide
- Posts: 2692
- Joined: Sat Jun 21, 2014 2:48 pm
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