It’s a Generator function. Generators are functions which can be exited and later re-entered. Their context (variable bindings) will be saved across re-entrances. Calling a generator function does not execute its body immediately; an iterator object for the function is returned instead. When the iterator’s next() method is called, the generator function’s body is executed … Read more
The solution is the binding of variables through closure. As a more basic example, here is an example function that receives and calls a callback function, as well as an example callback function: function callbackReceiver(callback) { callback(“Hello World”); } function callback(value1, value2) { console.log(value1, value2); } This calls the callback and supplies a single argument. … Read more
Do you mean this? def perform(fun, *args): fun(*args) def action1(args): # something def action2(args): # something perform(action1) perform(action2, p) perform(action3, p, r)
The following program calculates nCr in an efficient manner (compared to calculating factorials etc.) import operator as op from functools import reduce def ncr(n, r): r = min(r, n-r) numer = reduce(op.mul, range(n, n-r, -1), 1) denom = reduce(op.mul, range(1, r+1), 1) return numer // denom # or / in Python 2 As of Python … Read more
Jim has got this pretty much covered in his blog post, but I’m posting a briefing here for reference. First, let’s see what the Scala Specification tell us. Chapter 3 (types) tell us about Function Types (3.2.9) and Method Types (3.3.1). Chapter 4 (basic declarations) speaks of Value Declaration and Definitions (4.1), Variable Declaration and … Read more
Edit: The Flutter team has now taken an official stance on the matter and stated that classes are preferable. See https://www.youtube.com/watch?v=IOyq-eTRhvo TL;DR: Prefer using classes over functions to make reusable widget-tree. EDIT: To make up for some misunderstanding: This is not about functions causing problems, but classes solving some. Flutter wouldn’t have StatelessWidget if a … Read more
There are a few usages: PartialFunction Remember a PartialFunction[A, B] is a function defined for some subset of the domain A (as specified by the isDefinedAt method). You can “lift” a PartialFunction[A, B] into a Function[A, Option[B]]. That is, a function defined over the whole of A but whose values are of type Option[B] This … Read more
Seeing as I hate eval, and I am not alone: var fn = window[settings.functionName]; if(typeof fn === ‘function’) { fn(t.parentNode.id); } Edit: In reply to @Mahan’s comment: In this particular case, settings.functionName would be “clickedOnItem”. This would, at runtime translate var fn = window[settings.functionName]; into var fn = window[“clickedOnItem”], which would obtain a reference to … Read more
In this case, your array variable arr can actually also be treated as a pointer to the beginning of your array’s block in memory, by an implicit conversion. This syntax that you’re using: int fillarr(int arr[]) Is kind of just syntactic sugar. You could really replace it with this and it would still work: int … Read more
declare -F Function names and definitions may be listed with the -f option to the declare builtin command (see Bash Builtins). The -F option to declare will list the function names only (and optionally the source file and line number). Bash Reference Manual