Question

Passes each element in the sequence to the specified callback during iteration. This is like Sequence#each, except that it can be inserted anywhere in the middle of a chain of methods to "intercept" the values in the sequence at that point.

Signature

Sequence.tap = function(callback) { /*...*/ }

Sequence.tap = function tap(callback) {
  return new TappedSequence(this, callback);
}

Name	Type(s)	Description
callback	Function	A function to call on every element in the sequence during iteration. The return value of this function does not matter.
returns	Sequence	A sequence comprising the same elements as this one.

Examples

Lazy([1, 2, 3]).tap(fn).each(Lazy.noop); // calls fn 3 times