anonymous-function

While working with Laravel framework, more specific - Form macros, I stumbled upon a weird error. At first, I thought it's something wrong with Laravel, but then I took everything out of context: <?php // placeholder function that takes variable as reference $function = function(&$reference) { // append to variable $reference = $reference . ':' . __METHOD__; }; // test with straight call $variable = 'something'; $function($variable); echo $variable; // test with call_user_func(), that gets called in Laravels case $variable = 'something'; // reset call_user_func($function, $variable); echo

I'm trying to solve differential equation using the ode45 function. Consider the following code, [t1,X2] = ode45(@(t,x)fun(t,x,C1,C2,C3,C4),t0,X01); where parameters C1 , C2 , C3 and C4 are column vectors, which should be available to the function that ode45 is referring to ( fun.m ). I want the values to change after every iteration, so for example, at the beginning the entry of C1 I want in is C1(1) , in the next iteration it's C1(2) , etc. How can I implement that? You may have noticed that the official docs are not too helpful in this scenario (as they pretty much force you to use global

i was working with anonymous functionss in erlang when a problem caught my attention. the function is defined as follows -module(qt). -export([ra/0]). ra = fun() -> 4 end. this however does not work -export(Ra/0]). Ra = fun() -> 4 end. and neither does this can anyone tell me why erlang exhibits this behaviour ? An Erlang module cannot export variables, only functions. You can achieve something similar to exporting variables by exporting a function with zero arguments that simply returns a value (an anonymous function is a valid return value): -module(qt). -export([ra/0]). ra() -> fun() -> 4

I saw some code on another question that seems to create an anonymous function (closure expression) with some unusual syntax: let plus: (Int, Int) -> Int = (+) I understand the left side—that it's declaring a constant of type (Int, Int) -> Int (a function that takes two Integers and returns an Integer). But what is (+) ? How can it declare a function without curly brackets, and how does it refer to the two arguments when there are no argument labels of any kind? The function takes two arguments, adds them together, and returns the result. If I replace the + operator with a different one (say a