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Create an iterator which generates a positive integer sequence.
The sequence of positive integers 1, 2, 3, 4, ...
(OEIS A000027) is also commonly referred to the sequence of natural numbers, whole numbers, and counting numbers; however, those terms are ambiguous due to the inclusion or exclusion of 0
.
import iterPositiveIntegersSeq from 'https://cdn.jsdelivr.net/gh/stdlib-js/math-iter-sequences-positive-integers@esm/index.mjs';
Returns an iterator which generates a positive integer sequence.
var it = iterPositiveIntegersSeq();
// returns <Object>
var v = it.next().value;
// returns 1
v = it.next().value;
// returns 2
v = it.next().value;
// returns 3
// ...
The returned iterator protocol-compliant object has the following properties:
- next: function which returns an iterator protocol-compliant object containing the next iterated value (if one exists) assigned to a
value
property and adone
property having aboolean
value indicating whether the iterator is finished. - return: function which closes an iterator and returns a single (optional) argument in an iterator protocol-compliant object.
The function supports the following options
:
- iter: number of iterations. Default:
9007199254740991
.
By default, the function returns a finite iterator to avoid exceeding the maximum safe double-precision floating-point integer. To adjust the number of iterations, set the iter
option.
var opts = {
'iter': 2
};
var it = iterPositiveIntegersSeq( opts );
// returns <Object>
var v = it.next().value;
// returns 1
v = it.next().value;
// returns 2
var bool = it.next().done;
// returns true
- If an environment supports
Symbol.iterator
, the returned iterator is iterable.
<!DOCTYPE html>
<html lang="en">
<body>
<script type="module">
import iterPositiveIntegersSeq from 'https://cdn.jsdelivr.net/gh/stdlib-js/math-iter-sequences-positive-integers@esm/index.mjs';
// Create an iterator:
var opts = {
'iter': 100
};
var it = iterPositiveIntegersSeq( opts );
// Perform manual iteration...
var v;
while ( true ) {
v = it.next();
if ( v.done ) {
break;
}
console.log( v.value );
}
</script>
</body>
</html>
@stdlib/math-iter/sequences/nonnegative-integers
: create an iterator which generates a nonnegative integer sequence.@stdlib/math-iter/sequences/nonpositive-integers
: create an iterator which generates a nonpositive integer sequence.@stdlib/math-iter/sequences/negative-integers
: create an iterator which generates a negative integer sequence.
This package is part of stdlib, a standard library with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.
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See LICENSE.
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