DusanKasan /
Knapsack
| @@ 752-767 (lines=16) @@ | ||
| 749 | * @param mixed|null $key |
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| 750 | * @return Collection |
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| 751 | */ |
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| 752 | function prepend($collection, $value, $key = null) |
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| 753 | { |
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| 754 | $generatorFactory = function () use ($collection, $value, $key) { |
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| 755 | if ($key === null) { |
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| 756 | yield $value; |
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| 757 | } else { |
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| 758 | yield $key => $value; |
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| 759 | } |
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| 760 | ||
| 761 | foreach ($collection as $key => $value) { |
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| 762 | yield $key => $value; |
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| 763 | } |
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| 764 | }; |
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| 765 | ||
| 766 | return new Collection($generatorFactory); |
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| 767 | } |
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| 768 | ||
| 769 | /** |
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| 770 | * Returns a lazy collection of items in $collection with $value added as last element. If $key is not provided |
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| @@ 778-793 (lines=16) @@ | ||
| 775 | * @param mixed|null $key |
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| 776 | * @return Collection |
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| 777 | */ |
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| 778 | function append($collection, $value, $key = null) |
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| 779 | { |
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| 780 | $generatorFactory = function () use ($collection, $value, $key) { |
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| 781 | foreach ($collection as $k => $v) { |
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| 782 | yield $k => $v; |
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| 783 | } |
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| 784 | ||
| 785 | if ($key === null) { |
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| 786 | yield $value; |
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| 787 | } else { |
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| 788 | yield $key => $value; |
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| 789 | } |
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| 790 | }; |
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| 791 | ||
| 792 | return new Collection($generatorFactory); |
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| 793 | } |
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| 794 | ||
| 795 | /** |
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| 796 | * Returns a lazy collection by removing items from $collection until first item for which $function returns false. |
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