Top Directives De Objets de collection

Top Directives De Objets de collection

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The before method is the opposite of the after method. It returns the item before the given item. null is returned if the given item is not found or is the first item:

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.

The returned map will Supposé que serializable if the specified map is serializable. Since null is considered to be a value of any reference frappe, the returned map permits the insertion of null keys or values

The concat method numerically reindexes keys conscience de même concatenated onto the frais collection. To maintain keys in associative collections, see the merge method.

The sortBy method sorts the collection by the given rossignol. The sorted collection keeps the frais array keys, so in the following example we will coutumes the values method to reset the keys to consecutively numbered indexes:

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The unique method uses "loose" comparisons when checking get more info item values, meaning a string with année integer value will be considered equal to an integer of the same value. Usages the uniqueStrict method to filter using "court" comparisons.

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This method searches for the given item using "loose" comparison, meaning a string containing année integer value will Sinon considered equal to année integer of the same value. To règles "court" comparison, you may provide the court argumentation to the method:

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This method is used to retain only the elements in this collection that are contained in the specified collection.

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This is especially useful when you need to perform Mutation nous a huge Collection that contains many items: