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File: README.md
Role: Documentation
Content type: text/markdown
Description: Documentation
Class: Lexographical PHP Permutations Generator
Generate permutations of characters of a string
Author: By
Last change: Changed travis badge to develop branch.
Date: 4 years ago
Size: 2,116 bytes
 

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Generates (lexographical) permutations.

Build Status Code Climate Test Coverage Issue Count

use Jelle_S\Util\Permutation\LexographicalPermutation;
$number = 12345;
$next = LexographicalPermutation::getNextPermutation($number);
print "The next lexographical permutation of {$number} is {$next}.\n";

$number = 32154;
$previous = LexographicalPermutation::getPreviousPermutation($number);
print "The previous lexographical permutation of {$number} is {$previous}.\n";

$first = LexographicalPermutation::getFirstPermutation($number);
print "The first lexographical permutation of {$number} is {$first}.\n";

$last = LexographicalPermutation::getLastPermutation($number);
print "The last lexographical permutation of {$number} is {$last}.\n";

$number = 3124;
$all = print_r(LexographicalPermutation::getAllPermutations($number), TRUE);
print "All lexographical permutations of {$number} are \n{$all}\n";

Output:

The next lexographical permutation of 12345 is 12354.
The previous lexographical permutation of 32154 is 32145.
The first lexographical permutation of 32154 is 12345.
The last lexographical permutation of 32154 is 54321.
All lexographical permutations of 3124 are
Array
(
    [0] => 1234
    [1] => 1243
    [2] => 1324
    [3] => 1342
    [4] => 1423
    [5] => 1432
    [6] => 2134
    [7] => 2143
    [8] => 2314
    [9] => 2341
    [10] => 2413
    [11] => 2431
    [12] => 3124
    [13] => 3142
    [14] => 3214
    [15] => 3241
    [16] => 3412
    [17] => 3421
    [18] => 4123
    [19] => 4132
    [20] => 4213
    [21] => 4231
    [22] => 4312
    [23] => 4321
)
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