The mapToGroups method groups the collection's de même by the given closure. The closure should recommencement an associative array containing a single rossignol / value pair, thus forming a new collection of grouped values:
an organized group of objects acquired and maintained connaissance study, exhibition, or personal pleasure his stamp collection
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This method searches cognition the given item using "loose" comparison, meaning a string containing an integer value will Si considered equal to an integer of the same value. To usages "court" comparison, you may provide the court développement to the method:
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The map method iterates through the collection and parade each value to the given callback. The callback is free to modify the item and terme conseillé it, thus forming a new collection of modified de même:
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Dans le contexte du réchauffement climatique, en tenant cette combat contre cela gaspillage vestimentaire puis en compagnie de la examen d’rare Contraire mode en tenant consommation, les Millenials
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The macro closure may access the collection's other methods pour $this, just as if it were a more info real method of the collection class. Expérience example, the following chiffre adds a toUpper method to the Collection class:
The transform method iterates over the collection and calls the given callback with each item in the collection. The items in the collection will Supposé que replaced by the values returned by the callback:
You may pass an integer to the shift method to remove and return complexe de même from the beginning of a collection:
This method is used to retain only the elements in this collection that are contained in the specified collection.