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 โ€ฆ

Aug 31, 2008ย ยท I asked a question about Currying and closures were mentioned. What is a closure? How does it relate to currying?

And here comes the closure part: The closure of a lambda expression is this particular set of symbols defined in the outer context (environment) that give values to the free symbols in this expression, โ€ฆ

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Sep 21, 2008ย ยท A closure is a pairing of: A function and A reference to that function's outer scope (lexical environment) A lexical environment is part of every execution context (stack frame) and is a map โ€ฆ

But I honestly like the Closure + Closure::fromCallable approach, because string or array as callable has always been weird. Will B. Over a year ago @RoboRobok one reason for requiring only Closure โ€ฆ

Mar 5, 2009ย ยท I asked a question about callbacks and arrived at another question (see comment). How is a closure different from a callback?

Sep 27, 2010ย ยท A closure is a first class function with bound variables. Roughly that means that: You can pass the closure as a parameter to other functions The closure stores the value of some variables โ€ฆ

Apr 15, 2009ย ยท That's the magic, and frustration, of closure. "JavaScript Functions close over the scope they are declared in, and retain access to that scope even as variable values inside of that scope โ€ฆ

Nov 26, 2009ย ยท A closure is a function value created from a possibly nested function declaration or function expression (i.e. lambda expression) whose body contains may one or more references to โ€ฆ

Apr 15, 2009ย ยท That's the magic, and frustration, of closure. "JavaScript Functions close over the scope they are declared in, and retain access to that scope even as variable values inside of that scope โ€ฆ

Nov 26, 2009ย ยท A closure is a function value created from a possibly nested function declaration or function expression (i.e. lambda expression) whose body contains may one or more references to โ€ฆ

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