DusanKasan /
Knapsack
| @@ 784-799 (lines=16) @@ | ||
| 781 | * @param mixed|null $key |
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| 782 | * @return Collection |
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| 783 | */ |
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| 784 | function prepend($collection, $value, $key = null) |
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| 785 | { |
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| 786 | $generatorFactory = function () use ($collection, $value, $key) { |
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| 787 | if ($key === null) { |
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| 788 | yield $value; |
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| 789 | } else { |
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| 790 | yield $key => $value; |
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| 791 | } |
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| 792 | ||
| 793 | foreach ($collection as $key => $value) { |
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| 794 | yield $key => $value; |
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| 795 | } |
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| 796 | }; |
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| 797 | ||
| 798 | return new Collection($generatorFactory); |
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| 799 | } |
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| 800 | ||
| 801 | /** |
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| 802 | * Returns a lazy collection of items in $collection with $value added as last element. If $key is not provided |
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| @@ 810-825 (lines=16) @@ | ||
| 807 | * @param mixed|null $key |
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| 808 | * @return Collection |
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| 809 | */ |
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| 810 | function append($collection, $value, $key = null) |
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| 811 | { |
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| 812 | $generatorFactory = function () use ($collection, $value, $key) { |
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| 813 | foreach ($collection as $k => $v) { |
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| 814 | yield $k => $v; |
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| 815 | } |
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| 816 | ||
| 817 | if ($key === null) { |
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| 818 | yield $value; |
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| 819 | } else { |
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| 820 | yield $key => $value; |
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| 821 | } |
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| 822 | }; |
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| 823 | ||
| 824 | return new Collection($generatorFactory); |
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| 825 | } |
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| 826 | ||
| 827 | /** |
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| 828 | * Returns a lazy collection by removing items from $collection until first item for which $function returns false. |
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