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<?php |
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/** |
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* @author Boudewijn Schoon <[email protected]> |
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* @copyright Zicht Online <http://zicht.nl> |
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*/ |
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namespace Zicht\Itertools\lib\Traits; |
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use Zicht\Itertools as iter; |
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trait MapByTrait |
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{ |
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/** |
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* Make an iterator returning values from this iterable and keys |
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* from $STRATEGY. |
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* |
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* When $strategy is a string, the key is obtained through one of |
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* the following: |
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* 1. $value->{$strategy}, when $value is an object and |
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* $strategy is an existing property, |
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* 2. call $value->{$strategy}(), when $value is an object and |
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* $strategy is an existing method, |
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* 3. $value[$strategy], when $value is an array and $strategy |
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* is an existing key, |
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* 4. otherwise the key will default to null. |
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* |
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* Alternatively $strategy can be a closure. In this case the |
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* $strategy closure is called with each value in $iterable and the |
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* key will be its return value. |
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* |
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* > $list = [['id'=>1, 'title'=>'one'], ['id'=>2, 'title'=>'two']] |
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* > iter\iterable($list)->mapBy('id') |
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* 1=>['id'=>1, 'title'=>'one'] 2=>['id'=>2, 'title'=>'two'] |
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* |
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* @param string|\Closure $strategy |
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* @return iter\lib\MapByIterator |
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*/ |
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public function mapBy($strategy) |
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{ |
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return iter\mapBy($strategy, $this); |
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} |
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} |
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zicht /
itertools
