Add converge function

[win0err]

Converge

Accepts a converging function and a list of branching functions and returns a new function. When invoked, this new function is applied to some arguments, and each branching function is applied to those same arguments. The results of each branching function are passed as arguments to the converging function to produce the return value.

<?php
converge('intdiv', ['max', 'min'])([2, 3, 4, 5, 6]); // 3

JS ramda analog

[Erikvv]

What is the reason to do this instead of equivalent code which is also functional:

function middle(array $data) {
    return intdiv(max($data), min($data));
}

middle([2, 3, 4, 5, 6]);

Converge would be useful if you don't know which functions to apply beforehand but I can't think of such case.

Do you have a good usecase?

[win0err]

What is the reason to do this instead of equivalent code which is also functional:

function middle(array $data) {
    return intdiv(max($data), min($data));
}

middle([2, 3, 4, 5, 6]);

Converge would be useful if you don't know which functions to apply beforehand but I can't think of such case.

Do you have a good usecase?

<?php
// sma() function is taken from here: 
// https://github.com/markrogoyski/math-php/blob/master/src/Statistics/Average.php#L650
$sma = curry_n(2, flip('sma'));

$processingFunction = fn (...$args) => array_map(curry('implode')(' → '), $args); $getChart = converge( $processingFunction, [$sma(1), $sma(2), $sma(4), $sma(8)] ); // vs. $getChart2 = function ($data) use ($sma) { return [ implode(' → ', $sma(1)($data)), implode(' → ', $sma(2)($data)), implode(' → ', $sma(4)($data)), implode(' → ', $sma(8)($data)), ]; };

$chart = $getChart([1, 2, 3, 4, 5, 6, 7, 8, 9]);

Pros of `converge` is a more functional approach. It's easy to add another function like `$sma(42)` to the list of branching functions.

[lstrojny]

Awesome, thank you!