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Create an iterator which appends additional values to the end of a provided iterator.
To use in Observable,
iterPush = require( 'https://cdn.jsdelivr.net/gh/stdlib-js/iter-push@umd/browser.js' )To vendor stdlib functionality and avoid installing dependency trees for Node.js, you can use the UMD server build:
var iterPush = require( 'path/to/vendor/umd/iter-push/index.js' )To include the bundle in a webpage,
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/iter-push@umd/browser.js"></script>If no recognized module system is present, access bundle contents via the global scope:
<script type="text/javascript">
(function () {
window.iterPush;
})();
</script>Returns an iterator which appends additional values to the end of a provided iterator.
var array2iterator = require( '@stdlib/array-to-iterator' );
var it = iterPush( array2iterator( [ 1, 2 ] ), 3, 4 );
// returns <Object>
var v = it.next().value;
// returns 1
v = it.next().value;
// returns 2
v = it.next().value;
// returns 3
v = it.next().value;
// returns 4
var bool = it.next().done;
// returns trueThe 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.
<!DOCTYPE html>
<html lang="en">
<body>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/random-iter-randu@umd/browser.js"></script>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/iter-push@umd/browser.js"></script>
<script type="text/javascript">
(function () {
// Create a seeded iterator for generating pseudorandom numbers:
var rand = randu({
'seed': 1234,
'iter': 10
});
// Create an iterator with appended values:
var it = iterPush( rand, 'beep', 'boop' );
// Perform manual iteration...
var v;
while ( true ) {
v = it.next();
if ( v.done ) {
break;
}
console.log( v.value );
}
})();
</script>
</body>
</html>@stdlib/iter-concat: create an iterator which iterates over the values of two or more iterators.@stdlib/iter-unshift: create an iterator which prepends values to the beginning of a provided iterator.
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.
For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.
See LICENSE.
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