| @@ 1804-1820 (lines=17) @@ | ||
| 1801 | * @return static | |
| 1802 | * <p>(Immutable)</p> | |
| 1803 | */ | |
| 1804 | public function firstsKeys(int $number = null): self | |
| 1805 |     { | |
| 1806 | $arrayTmp = $this->keys()->getArray(); | |
| 1807 | ||
| 1808 |         if ($number === null) { | |
| 1809 | $array = (array) \array_shift($arrayTmp); | |
| 1810 |         } else { | |
| 1811 | $number = (int) $number; | |
| 1812 | $array = \array_splice($arrayTmp, 0, $number); | |
| 1813 | } | |
| 1814 | ||
| 1815 | return static::create( | |
| 1816 | $array, | |
| 1817 | $this->iteratorClass, | |
| 1818 | false | |
| 1819 | ); | |
| 1820 | } | |
| 1821 | ||
| 1822 | /** | |
| 1823 | * Get the first value(s) from the current array. | |
| @@ 1831-1847 (lines=17) @@ | ||
| 1828 | * @return static | |
| 1829 | * <p>(Immutable)</p> | |
| 1830 | */ | |
| 1831 | public function firstsImmutable(int $number = null): self | |
| 1832 |     { | |
| 1833 | $arrayTmp = $this->getArray(); | |
| 1834 | ||
| 1835 |         if ($number === null) { | |
| 1836 | $array = (array) \array_shift($arrayTmp); | |
| 1837 |         } else { | |
| 1838 | $number = (int) $number; | |
| 1839 | $array = \array_splice($arrayTmp, 0, $number); | |
| 1840 | } | |
| 1841 | ||
| 1842 | return static::create( | |
| 1843 | $array, | |
| 1844 | $this->iteratorClass, | |
| 1845 | false | |
| 1846 | ); | |
| 1847 | } | |
| 1848 | ||
| 1849 | /** | |
| 1850 | * Get and rmove the first value(s) from the current array. | |