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Node.js programs are invoked by running the interpreter node interpreter with a given file, so the first two arguments will be node and the name of the JavaScript source file. It is often useful to extract the rest of the arguments by slicing a sub-array from process.argv .
In MODULE_CODE, we want to add the "Wikify" tab, so we will use the addPortletLink() function (requiring the mediawiki.util module). Replace MODULE_CODE with a call to this function. Then we will bind an event handler so that when this link is clicked, we will call another function named doQwikify() that will actually execute the code.
Immediately invoked function expressions may be written in a number of different ways. [3] A common convention is to enclose the function expression – and optionally its invocation operator – with the grouping operator, [4] in parentheses, to tell the parser explicitly to expect an expression.
A sample UML class and sequence diagram for the Command design pattern. [3]In the above UML class diagram, the Invoker class doesn't implement a request directly. Instead, Invoker refers to the Command interface to perform a request (command.execute()), which makes the Invoker independent of how the request is performed.
In the following example the function name foo and the variable name bar are both metasyntactic variables. Lines beginning with // are comments. // The function named foo int foo ( void ) { // Declare the variable bar and set the value to 1 int bar = 1 ; return bar ; }
Assuming they are type foo and bar, which are the actual names of the variables they wish to swap, this will yield the code: temp = foo foo = bar bar = temp If the snippet is subsequently changed, say to use __temp instead of temp , it will not change the code that has already been inserted, but will be used in subsequent insertions of the snippet.
Prefix sums are trivial to compute in sequential models of computation, by using the formula y i = y i − 1 + x i to compute each output value in sequence order. However, despite their ease of computation, prefix sums are a useful primitive in certain algorithms such as counting sort, [1] [2] and they form the basis of the scan higher-order function in functional programming languages.
In Python and Ruby, the same asterisk notation used in defining variadic functions is used for calling a function on a sequence and array respectively: func ( * args ) Python originally had an apply function, but this was deprecated in favour of the asterisk in 2.3 and removed in 3.0.