iterable_unique()

Complexity

Conditions	6
Paths	7

Size

Total Lines	19
Code Lines	11

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	11
CRAP Score	6

Importance

Changes

0

<?php
function iterable_unique(iterable $iterable, callable $serialize = null): \Generator

Function Improved\iterable_unique() has parameter $iterable with no value type specified in iterable type iterable.

Function Improved\iterable_unique() return type has no value type specified in iterable type Generator.

{
    $fastMap = []; // entries as keys, entry must be a string
    $slowMap = []; // non-string entries

    foreach ($iterable as $key => $value) {
        $entry = isset($serialize) ? call_user_func($serialize, $value, $key) : $value;

        if (is_string($entry) ? isset($fastMap[$entry]) : in_array($entry, $slowMap, true)) {
            continue;
        }

        if (is_string($entry)) {
            $fastMap[$entry] = true;
        } else {
            $slowMap[] = $entry;
        }

        yield $key => $value;
    }