globals

This question already has answers here : PHP_SELF vs PATH_INFO vs SCRIPT_NAME vs REQUEST_URI (9 answers) Closed 6 years ago . all is said in the title. What is the difference between the three properties ? I've been testing the value of them and all what I can say is they are similar. However because I'm a standard freak, I'd like to know if there are some subtlety between them so I can avoid bad coding or being stuck later in some unexpected behavior. 'PHP_SELF' The filename of the currently executing script, relative to the document root. For instance, $_SERVER['PHP_SELF'] in a script at the

From the DailyJS "Let's build a JavaScript Framework" I'm not quite sure on the following code, obviously used as a global abatement technique. My understanding so far balks at (function(){}) . I understand setting the turing var up, setting global.turing to turing, and return either window or this (if not in a browser), but the (function(global){})(this or window) thing confuses me...I've seen things like var mything = {} and setting all your code up under mything, but this idiom confuses me a little. I really want to understand the reasoning here vs memorizing that it "works out" (function

I am trying to import a module from inside a function and have it be available to my whole file the same way it would be if I imported outside any functions and before all the other code. The reason it is in a function is because I don't have much control over the structure of the script. Is this possible without resorting to things like hacking __builtin__ or passing what I need all around my code? How about something like globals()["os"] = __import__("os")? I guess this could be wrapped in a generic function if you wanted since the module name is a string. Seeing your new comments, I want to

I want to modify some classes in the standard library to use a different set of globals the ones that other classes in that module use. Example This example is an example only: # module_a.py my_global = [] class A: def __init__(self): my_global.append(self) class B: def __init__(self): my_global.append(self) In this example, If I create an instance of A , via A() , it will call append on the object named by my_global . But now I wish to create a new module, import B to it, and have B use my_global from the module it's been imported into, instead of the my_global from the module B was original

Hi. I recently learned PHP and am trying to declare a global array so I can access inside a function. But I seem to be missing something because I get the error 'Undefined variable:' Here is my code: global $second_array; $second_array = array(); function operatii($v) { $var1 = $second_array[count($second_array)-1]; $var2 = $second_array[count($second_array)-2]; $rez = null; echo $var1 . $var2 . "este?"; } for ($i = 0; $i < count($a); $i++){ if ($a[$i] === "+" || $a[$i] === "-" || $a[$i] === "*" || $a[$i] === "/" ) { operatii($a[$i]); } else { array_push($second_array, $a[$i]); } } I seem to

Why would I want to overload a C++ operator() as global and not member function. For example, the == operator. Why is this done? for example in STL libraries. The usual rule is for operators which modify the left hand object to be members, and binary operators which return a new object to be free functions; the main motivation for the latter is because the compiler will not convert the left hand side to match a member; if your class supports any implicit conversions, then all of the usual binary operators should be free functions, so that the same rules of conversion apply for the left hand