[RFC]: add `@stdlib/iter/cusome`

[kgryte]

Description

This RFC proposes adding the package @stdlib/iter/cusome, which cumulatively tests whether at least n iterated values are truthy. The function should be a transform iterator, continuing to iterate while source iterator values are available.

var array2iterator = require( '@stdlib/array/to-iterator' );

var arr = array2iterator( [ false, false, false, true, true ] );

var it = iterCuSome( arr, 2 );

var v = it.next().value;
// returns false

v = it.next().value;
// returns false

v = it.next().value;
// returns false

v = it.next().value;
// returns false

v = it.next().value;
// returns true

var bool = it.next().done;
// returns true

Related Issues

No.

Questions

No.

Other

• See also @stdlib/iter/some

Checklist

• [X] I have read and understood the Code of Conduct.
• [X] Searched for existing issues and pull requests.
• [X] The issue name begins with RFC:.