Native Function

Regular expression to detect a native function.

Installation

$ npm install regex-native-function

Usage

var re = require( 'regex-native-function' );

re

Regular expression to detect a native function.

var bool = re.test( Math.sqrt.toString() );
// returns true
 
bool = re.test( (function(){}).toString() );
// returns false

Examples

var re = require( 'regex-native-function' );
 
function isNative( fcn ) {
    return re.test( fcn.toString() );
}
 
console.log( isNative( Math.sqrt ) );
// returns true
 
console.log( isNative( String ) );
// returns true
 
console.log( isNative( Int8Array ) );
// returns true
 
console.log( isNative( Date ) );
// returns true
 
console.log( isNative( function(){} ) );
// returns false

To run the example code from the top-level application directory,

$ node ./examples/index.js

Tests

Unit

Unit tests use the Mocha test framework with Chai assertions. To run the tests, execute the following command in the top-level application directory:

$ make test

All new feature development should have corresponding unit tests to validate correct functionality.

Test Coverage

This repository uses Istanbul as its code coverage tool. To generate a test coverage report, execute the following command in the top-level application directory:

$ make test-cov

Istanbul creates a ./reports/coverage directory. To access an HTML version of the report,

$ make view-cov

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License

MIT license.

Copyright

Copyright © 2015. Athan Reines.