PHP 7 Data Structures and Algorithms

Currying

Currying is a technique of transforming a function that takes multiple arguments to a chain of functions where each function will take exactly one argument. In other words, if a function can be written as f(x,y,z), then the currying version of this will be f(x)(y)(z). let's consider the following example:

function sum($a, $b, $c) {    return $a + $b + $c;}

Here, we have written a simple function with three parameters and when called with numbers, it will return sum of the numbers. Now, if we write this function as a curry, it will look like this:

function currySum($a) {     return function($b) use ($a) {         return function ($c) use ($a, $b) {             return $a + $b + $c;         };     }; } $sum = currySum(10)(20)(30); echo $sum;

Now if we run the currySum ...