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is there any way to create variables in Ruby with dynamic names?
I'm reading a file and when I find a string, generates a hash.
e.g.
file = File.new("games.log", "r") file.lines do |l| l.split do |p| if p[1] == "InitGame" Game_# = Hash.new end end end How could I change # in Game_# to numbers (Game_1, Game_2, ...)
358
Variable names in Ruby can be created from alphanumeric characters and the underscore _ character. A variable cannot begin with a number. This makes it easier for the interpreter to distinguish a literal number from a variable. Variable names cannot begin with a capital letter.
A variable is a name that Ruby associates with a particular object. For example: city = "Toronto" Here Ruby associates the string "Toronto" with the name (variable) city. Think of it as Ruby making two tables. One with objects and another with names for them.
Instead of terminating the string and using the + operator, you enclose the variable with the #{} syntax. This syntax tells Ruby to evaluate the expression and inject it into the string.
You can do it with instance variables like
i = 0 file.lines do |l| l.split do |p| if p[1] == "InitGame" instance_variable_set("@Game_#{i += 1}", Hash.new) end end end but you should use an array as viraptor says. Since you seem to have just a new hash as the value, it can be simply
i = 0 file.lines do |l| l.split do |p| if p[1] == "InitGame" i += 1 end end end Games = Array.new(i){{}} Games[0] # => {} Games[1] # => {} ... If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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