PermutationUtility
Class with helper functions for permuting items.
Table of Contents
Methods
- meltArrayItems() : array
- Combines arbitrary items of multiple arrays as cross-product into flat items.
- meltStringItems() : array
- Combines string items of multiple arrays as cross-product into flat items.
- asString() : string
- nextItems() : iterable<string|int, mixed>
Methods
meltArrayItems()
Combines arbitrary items of multiple arrays as cross-product into flat items.
public
static meltArrayItems(array[] $payload[, array $previousResult = [] ]) : array
Example:
- meltArrayItems(['a','b'], ['c','e'], ['f','g'])
- results into ['a', 'c', 'e'], ['a', 'c', 'f'], ['a', 'd', 'e'], ['a', 'd', 'f'], ['b', 'c', 'e'], ['b', 'c', 'f'], ['b', 'd', 'e'], ['b', 'd', 'f'],
Parameters
- $payload : array[]
-
Distinct items that should be melted
- $previousResult : array = []
-
Previous item results
Return values
arraymeltStringItems()
Combines string items of multiple arrays as cross-product into flat items.
public
static meltStringItems(array[] $payload[, string $previousResult = '' ]) : array
Example:
- meltStringItems([['a', 'b'], ['c', 'd'], ['e', 'f']])
- results into ['ace', 'acf', 'ade', 'adf', 'bce', 'bcf', 'bde', 'bdf']
Parameters
- $payload : array[]
-
Distinct array that should be melted
- $previousResult : string = ''
-
Previous item results
Return values
arrayasString()
protected
static asString(mixed $item) : string
Parameters
- $item : mixed
Return values
stringnextItems()
protected
static nextItems(array &$payload) : iterable<string|int, mixed>
Parameters
- $payload : array