That will work fine (no exception). Extension methods don’t use virtual calls (i.e. it uses the “call” il instruction, not “callvirt”) so there is no null check unless you write it yourself in the extension method. This is actually useful in a few cases: public static bool IsNullOrEmpty(this string value) { return string.IsNullOrEmpty(value); } public … Read more
All the other answers are correct, but just for completion A function is declared in the following manner: return-type function-name(parameter-list,…) { body… } return-type is the variable type that the function returns. This can not be an array type or a function type. If not given, then int is assumed. function-name is the name of … Read more
The other answers have done a good job at explaining duck typing and the simple answer by tzot: Python does not have variables, like other languages where variables have a type and a value; it has names pointing to objects, which know their type. However, one interesting thing has changed since 2010 (when the question … Read more
When PowerShell sees a command starting with a string it just evaluates the string, that is, it typically echos it to the screen, for example: PS> “Hello World” Hello World If you want PowerShell to interpret the string as a command name then use the call operator (&) like so: PS> & ‘C:\Program Files\IIS\Microsoft Web … Read more
You can use one of these: https://developer.mozilla.org/en-US/docs/Web/API/URL https://developer.mozilla.org/en/docs/Web/API/URLSearchParams Example: var url = new URL(“http://foo.bar/?x=1&y=2”); // If your expected result is “http://foo.bar/?x=1&y=2&x=42” url.searchParams.append(‘x’, 42); // If your expected result is “http://foo.bar/?x=42&y=2” url.searchParams.set(‘x’, 42); You can use url.href or url.toString() to get the full URL
Figured it out for myself in the end. It is simple, I was just missing the ** operator to unpack the dictionary So my example becomes: d = dict(p1=1, p2=2) def f2(p1,p2): print p1, p2 f2(**d)
argv and argc are how command line arguments are passed to main() in C and C++. argc will be the number of strings pointed to by argv. This will (in practice) be 1 plus the number of arguments, as virtually all implementations will prepend the name of the program to the array. The variables are … Read more
A parameter is the variable which is part of the method’s signature (method declaration). An argument is an expression used when calling the method. Consider the following code: void Foo(int i, float f) { // Do things } void Bar() { int anInt = 1; Foo(anInt, 2.0); } Here i and f are the parameters, … Read more
Best solution here. var getUrlParameter = function getUrlParameter(sParam) { var sPageURL = window.location.search.substring(1), sURLVariables = sPageURL.split(‘&’), sParameterName, i; for (i = 0; i < sURLVariables.length; i++) { sParameterName = sURLVariables[i].split(‘=’); if (sParameterName[0] === sParam) { return sParameterName[1] === undefined ? true : decodeURIComponent(sParameterName[1]); } } return false; }; And this is how you can use … Read more
Declaration A prototype for a function which takes a function parameter looks like the following: void func ( void (*f)(int) ); This states that the parameter f will be a pointer to a function which has a void return type and which takes a single int parameter. The following function (print) is an example of … Read more