That would be a proc
x = proc { |e| e + 1 }
Then you could pass it as a variable
The example I was trying to use isn't working in irb
Not sure how the #map function handles proc arguments internally
Anyways, the basic idea is just that something like
{ |e| e + 1 } is a function
When it's passed into another method without first being assigned to a variable, it's referred to as a block, or anonymous function
When that bit of code is first assigned to a variable, it's a proc
They're basically the same concept, though - objects containing code which can be passed around.
If I were to make a method to accept the top example, I could do this:
def method_accepting_proc(variable, proc)
proc.call(variable)
end
method_accepting_proc(2, x) =># 3
This function accepts a named function (proc) as a second argument, and calls it internally (here using the x I defined above)
Alternatively
def method_using_block(variable, &block)
block.call(variable)
end
Or:
def method_using_block(variable)
yield(variable)
end
Both of those would be called like this:
method_using_block(2) do |x|
x + 1
end
=># 3
My dad might come too cause he is out here visiting
@/all also want to suggest checking out this excellent Ruby resource https://github.com/neo/ruby_koans
i think you’ll find that you have all the ruby, unix, and git knowledge to get started with these
:( :( :( will have to catch you all another time
hopefully its just a checkup