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Create an iterator which generates a sequence of nonpositive even integers.
To use in Observable,
iterNonPositiveEvenIntegersSeq = require( 'https://cdn.jsdelivr.net/gh/stdlib-js/math-iter-sequences-nonpositive-even-integers@umd/browser.js' )To vendor stdlib functionality and avoid installing dependency trees for Node.js, you can use the UMD server build:
var iterNonPositiveEvenIntegersSeq = require( 'path/to/vendor/umd/math-iter-sequences-nonpositive-even-integers/index.js' )To include the bundle in a webpage,
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/math-iter-sequences-nonpositive-even-integers@umd/browser.js"></script>If no recognized module system is present, access bundle contents via the global scope:
<script type="text/javascript">
(function () {
window.iterNonPositiveEvenIntegersSeq;
})();
</script>Returns an iterator which generates a sequence of nonpositive even integers.
var it = iterNonPositiveEvenIntegersSeq();
// returns <Object>
var v = it.next().value;
// returns 0
v = it.next().value;
// returns -2
v = it.next().value;
// returns -4
// ...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
valueproperty and adoneproperty having abooleanvalue 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:
4503599627370497.
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 = iterNonPositiveEvenIntegersSeq( opts );
// returns <Object>
var v = it.next().value;
// returns 0
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="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/math-iter-sequences-nonpositive-even-integers@umd/browser.js"></script>
<script type="text/javascript">
(function () {
// Create an iterator:
var opts = {
'iter': 100
};
var it = iterNonPositiveEvenIntegersSeq( 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/even-integers: create an iterator which generates an interleaved sequence of even integers.@stdlib/math-iter/sequences/integers: create an iterator which generates an interleaved integer sequence.@stdlib/math-iter/sequences/nonnegative-even-integers: create an iterator which generates a sequence of nonnegative even integers.@stdlib/math-iter/sequences/nonpositive-integers: create an iterator which generates a nonpositive integer sequence.@stdlib/math-iter/sequences/negative-even-integers: create an iterator which generates a sequence of negative even integers.
This package is part of stdlib, a standard library for JavaScript and Node.js, 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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