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find

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2023-12-01

Seaches for the first element in the sequence satisfying a given predicate.

Signature

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

Sequence.find = function find(predicate) {
  return this.filter(predicate).first();
}

Name	Type(s)	Description
predicate	Function	A function to call on (potentially) every element in the sequence.
returns	*	The first element in the sequence for which `predicate` returns `true`, or `undefined` if no such element is found.

Examples

function divisibleBy3(x) {
  return x % 3 === 0;
}

var numbers = [5, 6, 7, 8, 9, 10];

Lazy(numbers).find(divisibleBy3) // => 6
Lazy(numbers).find(isNegative)   // => undefined

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