Rx.Observable.prototype.every(predicate, [thisArg])

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Determines whether all elements of an observable sequence satisfy a condition.

Arguments

1. predicate (Function): A function to test each element for a condition.
2. [thisArg] (Function): Object to use as this when executing callback.

Returns

(Observable): An observable sequence containing a single element determining whether all elements in the source sequence pass the test in the specified predicate.

Example