FAQ Database Discussion Community


One all-encompassing definition of JavaScript closure

javascript,closures,variable-scope,scopes,lexical
I have read 10s of SO references on closures, MDN references and other blog articles. They all seem to define closures in their own ways. For example, From MDN documentation: function makeFunc() { var name = "Mozilla"; function displayName() { alert(name); } return displayName; } var myFunc = makeFunc(); myFunc();...

eloquent javascript chapter regarding modules. On scopes and eval function

javascript,scopes
Eloquent javscript writes this in chapter 10 of the modules chapter: The most obvious way is the special operator eval, which will execute a string of code in the current scope. This is usually a bad idea because it breaks some of the sane properties that scopes normally have, such...

python itertools combinations logic

python,environment-variables,itertools,scopes
I'm looking at the code for the combinations on the python documentation for itertools (https://docs.python.org/2/library/itertools.html) def combinations(iterable, r): # combinations('ABCD', 2) --> AB AC AD BC BD CD # combinations(range(4), 3) --> 012 013 023 123 pool = tuple(iterable) n = len(pool) if r > n: return indices = range(r)...

C++ 11- scopes & global variables

c++11,scopes
How can I reach global variables from inner scopes, given the following code sample, how can I reach the global string X from the main function and from the most inner scope as well, also is the most inner scope is accessible once we quit it to the main scope...

Is @SessionScoped a good practice? [duplicate]

jsf,scopes,session-scope
This question already has an answer here: How to choose the right bean scope? 2 answers I've read about all the differences between the types of scope (@SessionScoped, @ViewScoped, @ApplicationScope and @RequestScope), however, I'm still facing somehow a problem with my application. I have a page-1 with a grid...