some

优质

小牛编辑

140浏览

2023-12-01

Checks whether at least one element in this sequence satisfies a given predicate (or, if no predicate is specified, whether the sequence contains at least one element).

Signature

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

Sequence.some = function some(predicate) {
  predicate = createCallback(predicate, true);

  var success = false;
  this.each(function(e) {
if (predicate(e)) {
  success = true;
  return false;
}
  });
  return success;
}

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 at least one element in the sequence. False if `predicate` returns false for every element (or the sequence is empty).

Examples

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

Lazy(numbers).some()           // => true
Lazy(numbers).some(isEven)     // => true
Lazy(numbers).some(isNegative) // => false
Lazy([]).some()                // => false