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Introducing Enhanced Alert Actions and Triage Functionality
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@stdlib/function-ctor
Advanced tools
Readme
We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.
The library is fully decomposable, being architected in such a way that you can swap out and mix and match APIs and functionality to cater to your exact preferences and use cases.
When you use stdlib, you can be absolutely certain that you are using the most thorough, rigorous, well-written, studied, documented, tested, measured, and high-quality code out there.
To join us in bringing numerical computing to the web, get started by checking us out on GitHub, and please consider financially supporting stdlib. We greatly appreciate your continued support!
Function constructor.
npm install @stdlib/function-ctor
var Function = require( '@stdlib/function-ctor' );
Returns a new function object.
var greet = new Function( 'name', 'return "Hello, "+name+"!"' );
var v = greet( 'Jane' );
// returns 'Hello, Jane!'
Argument names must be strings corresponding to valid JavaScript parameters (i.e., a plain identifier, or, in environments supporting such parameters, a rest parameter or destructured parameter, optionally with a default).
A number representing the number of arguments expected by the function.
var greet = new Function( 'name', 'return "Hello, "+name+"!"' );
var v = greet.length;
// returns 1
Read-only property representing the name of the function.
function greet( name ) {
return 'Hello, '+name+'!';
}
var v = greet.name;
// returns 'greet'
// Functions created with the Function constructor are anonymous:
var fcn = new Function( 'name', 'return "Hello, "+name+"!"' );
v = fcn.name;
// returns 'anonymous'
Read-only property representing the prototype of the function.
function greet( name ) {
return 'Hello, '+name+'!';
}
var proto = greet.prototype;
// returns {}
Calls the specified function with the given this
argument and arguments provided as an array-like object.
function add( x, y ) {
return this.initial + x + y;
}
var ctx = {
'initial': 10
};
var v = add.apply( ctx, [ 1, 2 ] );
// returns 13
Returns a new function which invokes the original function with the given this
value and arguments.
function add( x, y ) {
return x + y;
}
var add1 = add.bind( null, 1 );
var v = add1( 2 );
// returns 3
Calls the specified function with the given this
value and arguments.
function add( x, y ) {
return this.initial + x + y;
}
var ctx = {
'initial': 10
};
var v = add.call( ctx, 1, 2 );
// returns 13
Returns a string representing the function.
function add( x, y ) {
return x + y;
}
var v = add.toString();
// e.g., returns 'function add( x, y ) {\n return x + y;\n}'
Function
objects with the Function
constructor is less efficient than declaring a function via a function expression or a function statement.Function
constructor can be invoked without the new
operator (using new
and not using new
both return a new Function
object).Function
constructor creates functions which execute in the global scope. Hence, created functions cannot access variables local to the scope in which functions were created.var Function = require( '@stdlib/function-ctor' );
var add = new Function( 'x', 'y', 'return x + y' );
var v = add( 1, 2 );
// returns 3
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 © 2016-2024. The Stdlib Authors.
FAQs
Function constructor.
The npm package @stdlib/function-ctor receives a total of 52,107 weekly downloads. As such, @stdlib/function-ctor popularity was classified as popular.
We found that @stdlib/function-ctor demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 4 open source maintainers collaborating on the project.
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