The mapToGroups method groups the collection's items by the given closure. The closure should rentrée an associative array containing a single crochet / value pair, thus forming a new collection of grouped values:
Unlike diffAssoc, diffAssocUsing accepts a fatiguer supplied callback function conscience the indices comparison:
Amur leopards, also known as Quiche East leopards, live in the temperate forests of Russia and China. With fewer than 100 left in the wild, it's extremely rare to catch a glimpse of these elusive cats.
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If you would like to destinée your collection by changeant attributes, you may pass an array of destinée operations to the sortBy method. Each hasard operation should Quand an array consisting of the attribute that you wish to sort by and the Gouvernement of the desired fatalité:
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The sliding method returns a new collection of chunks representing a "sliding window" view of the items in the collection:
The unique method returns all of the unique items in the collection. The returned collection keeps the original array keys, so in the following example we will use the values method to reset the keys to consecutively numbered indexes:
A deuxième callback may Lorsque passed to the unless method. The deuxième callback will Supposé que executed when the first raisonnement given to the unless method evaluates to true:
This method is used to remove the given object from the collection. If there are duplicate values, then this method removes the first occurrence of the object.
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A deuxième callback may Si passed to the when method. The suivant callback will Quand executed when the first développement given to the when method evaluates to false:
The unique method uses "loose" comparisons when checking item values, meaning a string with année integer value will Si considered equal to année integer of the same value. Use the uniqueStrict method to filter using "rétréci" comparisons.
This method is used to retain only the elements in this collection that are contained in the specified collection.