DusanKasan /
Knapsack
| @@ 785-800 (lines=16) @@ | ||
| 782 | * @param mixed|null $key |
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| 783 | * @return Collection |
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| 784 | */ |
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| 785 | function prepend($collection, $value, $key = null) |
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| 786 | { |
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| 787 | $generatorFactory = function () use ($collection, $value, $key) { |
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| 788 | if ($key === null) { |
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| 789 | yield $value; |
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| 790 | } else { |
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| 791 | yield $key => $value; |
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| 792 | } |
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| 793 | ||
| 794 | foreach ($collection as $key => $value) { |
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| 795 | yield $key => $value; |
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| 796 | } |
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| 797 | }; |
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| 798 | ||
| 799 | return new Collection($generatorFactory); |
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| 800 | } |
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| 801 | ||
| 802 | /** |
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| 803 | * Returns a lazy collection of items in $collection with $value added as last element. If $key is not provided |
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| @@ 811-826 (lines=16) @@ | ||
| 808 | * @param mixed|null $key |
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| 809 | * @return Collection |
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| 810 | */ |
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| 811 | function append($collection, $value, $key = null) |
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| 812 | { |
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| 813 | $generatorFactory = function () use ($collection, $value, $key) { |
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| 814 | foreach ($collection as $k => $v) { |
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| 815 | yield $k => $v; |
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| 816 | } |
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| 817 | ||
| 818 | if ($key === null) { |
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| 819 | yield $value; |
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| 820 | } else { |
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| 821 | yield $key => $value; |
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| 822 | } |
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| 823 | }; |
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| 824 | ||
| 825 | return new Collection($generatorFactory); |
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| 826 | } |
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| 827 | ||
| 828 | /** |
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| 829 | * Returns a lazy collection by removing items from $collection until first item for which $function returns false. |
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