When the keyword function is met in a statement position (as the first token in a statement), the function declaration is expressed as a function statement. Function statements are hoisted to the top of the scope, cannot be immediately invoked and must have a name. When the keyword is met in an expression position (i.e. … Read more
Use a = sorted(a, key=lambda x: x.modified, reverse=True) # ^^^^ On Python 2.x, the sorted function takes its arguments in this order: sorted(iterable, cmp=None, key=None, reverse=False) so without the key=, the function you pass in will be considered a cmp function which takes 2 arguments.
Simple rules to determine the scope of underscore: If the underscore is an argument to a method, then the scope will be outside that method, otherwise respective the rules below; If the underscore is inside an expression delimited by () or {}, the innermost such delimiter that contains the underscore will be used; All other … Read more
Formally speaking return is defined as always returning from the nearest enclosing named method A return expression return e must occur inside the body of some enclosing named method or function. The innermost enclosing named method or function in a source program, f , must have an explicitly declared result type, and the type of … Read more
Pre Java 8: The closest Java has to delegates are single method interfaces. You could use an anonymous inner class. interface StringFunc { String func(String s); } void doSomething(StringFunc funk) { System.out.println(funk.func(“whatever”)); } doSomething(new StringFunc() { public String func(String s) { return s + “asd”; } }); doSomething(new StringFunc() { public String func(String s) { … Read more
I think the problem lies with using single line comments //. Single-line comments enclosed in /* .. */ seem to work fine. Here’s an equivalent example with something other than a comment. $(‘element’).hover( -> console.log(“first”) -> console.log(“second”) ) Or with comments using /* .. */. $(‘element’).hover( -> /* first */ -> /* second */ ) … Read more
The first uses jQuery to bind a function to the document.ready event. The second declares and immediately executes a function.
This declaration (at block scope): int (*max)(int, int) = ({ int __fn__ (int x, int y) { return x > y ? x : y; } __fn__; }); is not C but is valid GNU C. It makes use of two gcc extensions: nested functions statement expressions Both nested functions (defining a function inside a … Read more
R passes promises, not the values themselves. The promise is forced when it is first evaluated, not when it is passed, and by that time the index has changed if one uses the code in the question. The code can be written as follows to force the promise at the time the outer anonymous function … Read more
Anonymous functions are useful when using functions that require a callback function like array_filter or array_map do: $arr = range(0, 10); $arr_even = array_filter($arr, function($val) { return $val % 2 == 0; }); $arr_square = array_map(function($val) { return $val * $val; }, $arr); Otherwise you would need to define a function that you possibly only … Read more