I'm trying to create some arrays in some threads and name them after a fixnum between 1 and 30 like the following:
times = 30
n=0
thread = []
while n < times
thread << Thread.new(n) {|x|
array#{x} = Array.new()
...
}
end
How can I do that?
Ruby does not allow you to create variable names from strings in the same way that PHP does. In a case such as this you could use an array or a hash instead.
times = 30
n=0
arrays = []
thread = []
while n < times
thread << Thread.new(n) {|x|
arrays[x] = Array.new()
...
}
end
You can also use more rubyish constructs instead of while, such as Fixnum#times.
arrays = []
threads = 30.times.map do |n|
Thread.new do
arrays[x] = Array.new
# ...
end
end
> arrays
#=> [[], [], [], ....]
> threads
#=> [#<Thread:0x007fe3f22a2320 dead>, #<Thread:0x007fe3f22a2208 dead>, ...]
If you don't mind using instance variables rather than local variables, you can do what you are trying to do (whether it is a good idea to design code in this way is another question).
1.upto(times) do |i|
instance_variable_set("@array#{i}".to_sym, [])
end
