mirror of https://github.com/vitalif/lime
59 lines
960 B
PHP
59 lines
960 B
PHP
<?php
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/*
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File: set.so.php
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License: GPL
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Purpose: We should really have a "set" data type. It's too useful.
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*/
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class set {
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public function __construct(array $list = array()) {
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$this->data = array_count_values($list);
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}
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public function has($item) {
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return isset($this->data[$item]);
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}
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public function add($item) {
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$this->data[$item] = true;
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}
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public function del($item) {
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unset($this->data[$item]);
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return $item;
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}
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public function all() {
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return array_keys($this->data);
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}
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public function one() {
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return key($this->data);
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}
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public function count() {
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return count($this->data);
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}
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public function pop() {
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return $this->del($this->one());
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}
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public function union($that) {
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$progress = false;
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foreach ($that->all() as $item) {
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if (!$this->has($item)) {
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$this->add($item);
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$progress = true;
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}
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}
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return $progress;
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}
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public function text() {
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return ' { ' . implode(' ', $this->all()) . ' } ';
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}
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}
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