Web Reference: Aug 31, 2008 · I asked a question about currying and closures were mentioned. What is a closure? How does it relate to currying? The closure object here is the value of the envelope variable and it's use is that it's a param to the each method. Some details: Scope: The scope of a closure is the data and members that can be accessed within it. When you create the closure, i is a reference to the variable defined in the outside scope, not a copy of it as it was when you created the closure. It will be evaluated at the time of execution. Most of the other answers provide ways to work around by creating another variable that won't change the value for you.
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