25 Oct '13, 1pm

@muppfoto "Symbols are not lightweight Strings" https://t.co/gVpegjkMye

Ruby uses symbols, and maintains a Symbol Table to hold them. Symbols are names - names of instance variables, names of methods, names of classes. So if there is a method called control_movie, there is automatically a symbol :control_movie. Ruby's interpreted, so it keeps its Symbol Table handy at all times. You can find out what's on it at any given moment by calling Symbol.all_symbols . A Symbol object is created by prefixing an operator, string, variable, constant, method, class, module name with a colon. The symbol object will be unique for each different name but does not refer to a particular instance of the name, for the duration of a program's execution. Thus, if Fred is a constant in one context, a method in another, and a class in a third, the Symbol :Fred will be the same object in all three contexts.

Full article: http://rubylearning.com/satishtalim/ruby_symbols.html

Tweets

@smoozoid

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