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every

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2023-12-01

Checks whether every element in this sequence satisfies a given predicate.

Signature

Sequence.every = function(predicate) { /*...*/ }

Sequence.every = function every(predicate) {
  predicate = createCallback(predicate);

  return this.each(function(e, i) {
return !!predicate(e, i);
  });
}

Name	Type(s)	Description
predicate	Function	A function to call on (potentially) every element in this sequence.
returns	boolean	True if `predicate` returns true for every element in the sequence (or the sequence is empty). False if `predicate` returns false for at least one element.

Examples

var numbers = [1, 2, 3, 4, 5];

var objects = [{ foo: true }, { foo: false, bar: true }];

Lazy(numbers).every(isEven)     // => false
Lazy(numbers).every(isPositive) // => true
Lazy(objects).all('foo')        // => false
Lazy(objects).all('bar')        // => false

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