DusanKasan /
Knapsack
| @@ 774-789 (lines=16) @@ | ||
| 771 | * @param mixed|null $key |
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| 772 | * @return Collection |
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| 773 | */ |
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| 774 | function prepend($collection, $value, $key = null) |
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| 775 | { |
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| 776 | $generatorFactory = function () use ($collection, $value, $key) { |
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| 777 | if ($key === null) { |
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| 778 | yield $value; |
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| 779 | } else { |
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| 780 | yield $key => $value; |
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| 781 | } |
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| 782 | ||
| 783 | foreach ($collection as $key => $value) { |
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| 784 | yield $key => $value; |
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| 785 | } |
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| 786 | }; |
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| 787 | ||
| 788 | return new Collection($generatorFactory); |
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| 789 | } |
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| 790 | ||
| 791 | /** |
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| 792 | * Returns a lazy collection of items in $collection with $value added as last element. If $key is not provided |
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| @@ 800-815 (lines=16) @@ | ||
| 797 | * @param mixed|null $key |
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| 798 | * @return Collection |
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| 799 | */ |
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| 800 | function append($collection, $value, $key = null) |
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| 801 | { |
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| 802 | $generatorFactory = function () use ($collection, $value, $key) { |
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| 803 | foreach ($collection as $k => $v) { |
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| 804 | yield $k => $v; |
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| 805 | } |
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| 806 | ||
| 807 | if ($key === null) { |
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| 808 | yield $value; |
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| 809 | } else { |
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| 810 | yield $key => $value; |
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| 811 | } |
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| 812 | }; |
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| 813 | ||
| 814 | return new Collection($generatorFactory); |
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| 815 | } |
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| 816 | ||
| 817 | /** |
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| 818 | * Returns a lazy collection by removing items from $collection until first item for which $function returns false. |
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