ReadOnlyObservableCollection.some

API / ReadOnlyObservableCollection<TItem> / some method

Checks whether some elements in the collection fulfil a given condition.

This is a public method.

public some(predicate: (item: TItem, index: number, collection: IReadOnlyObservableCollection<TItem>) => boolean): boolean;

Parameters

• predicate: Function, the callback performing the check for each item.

  Parameters:

  • item: TItem, the item being evaluated.
  • index: Number, the index of the item being evaluated.
  • collection: IReadOnlyObservableCollection<TItem>, the collection being iterated.

  Returns: Boolean

  Returns true if the provided item satisfies the condition; false otherwise.

Returns: Boolean

Returns true if the provided predicate is true for at least one item; otherwise false.

See

• Array.some

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Checks whether some elements in the collection fulfil a given condition.

some<TContext>(predicate: (this: TContext, item: TItem, index: number, collection: IReadOnlyObservableCollection<TItem>) => boolean, thisArg: TContext): boolean;

Template Parameters

• TContext: the context type in which the callback is executed.

Parameters

• predicate: Function, the callback performing the check for each item.

  Parameters:

  • item: TItem, the item being evaluated.
  • index: Number, the index of the item being evaluated.
  • collection: IReadOnlyObservableCollection<TItem>, the collection being iterated.

  Returns: Boolean

  Returns true if the provided item satisfies the condition; false otherwise.
• thisArg: TContext, a value to use as context when checking items.

Returns: Boolean

Returns true if the provided predicate is true for at least one item; otherwise false.

See

• Array.some