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Invoke a function
ntimes and return an array of accumulated function return values.
To use in Observable,
mapFun = require( 'https://cdn.jsdelivr.net/gh/stdlib-js/utils-map-function@umd/browser.js' )To vendor stdlib functionality and avoid installing dependency trees for Node.js, you can use the UMD server build:
var mapFun = require( 'path/to/vendor/umd/utils-map-function/index.js' )To include the bundle in a webpage,
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/utils-map-function@umd/browser.js"></script>If no recognized module system is present, access bundle contents via the global scope:
<script type="text/javascript">
(function () {
window.mapFun;
})();
</script>Invokes a function n times and returns an array of accumulated function return values.
function fcn( i ) {
return i;
}
var arr = mapFun( fcn, 5 );
// returns [ 0, 1, 2, 3, 4 ]To set the function execution context, provide a thisArg.
function fcn( i ) {
this.count += 1;
return i;
}
var context = {
'count': 0
};
var arr = mapFun( fcn, 5, context );
// returns [ 0, 1, 2, 3, 4 ]
console.log( context.count );
// => 5- The invoked
functionis provided a single argument: the invocation index (zero-based).
<!DOCTYPE html>
<html lang="en">
<body>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/random-base-randu@umd/browser.js"></script>
<script type="text/javascript" src="https://cdn.jsdelivr.net/gh/stdlib-js/utils-map-function@umd/browser.js"></script>
<script type="text/javascript">
(function () {
function rand( i ) {
return randu() * i * 10.0;
}
var arr = mapFun( rand, 100 );
console.log( arr );
})();
</script>
</body>
</html>@stdlib/utils-async/map-function: invoke a function n times and return an array of accumulated function return values.
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.
Copyright © 2016-2025. The Stdlib Authors.
