@stdlib/regexp-function-name

Function Name

Regular expression to capture a function name.

Installation

npm install @stdlib/regexp-function-name

Usage

var reFunctionName = require( '@stdlib/regexp-function-name' );

reFunctionName

Returns a regular expression to capture a function name.

function beep() {
    return 'boop';
}

var RE_FUNCTION_NAME = reFunctionName();
var str = RE_FUNCTION_NAME.exec( beep.toString() )[ 1 ];
// returns 'beep'

reFunctionName.REGEXP

Regular expression to capture a function name.

var str = reFunctionName.REGEXP.exec( Math.sqrt.toString() )[ 1 ];
// returns 'sqrt'

Examples

var Int8Array = require( '@stdlib/array-int8' );
var reFunctionName = require( '@stdlib/regexp-function-name' );
var RE_FUNCTION_NAME = reFunctionName();

function fname( fcn ) {
    return RE_FUNCTION_NAME.exec( fcn.toString() )[ 1 ];
}

var f = fname( Math.sqrt );
// returns 'sqrt'

f = fname( Int8Array );
// returns 'Int8Array'

f = fname( Object.prototype.toString );
// returns 'toString'

f = fname( function () {} );
// returns ''

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See Also

• @stdlib/utils/function-name: determine a function's name.

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Notice

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.

Community

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License

See LICENSE.

Copyright

Copyright © 2016-2022. The Stdlib Authors.