function2string
Return a string representing the source code of a provided function.
Usage
var function2string = require( '@stdlib/function/to-string' );
function2string( fcn )
Returns a string representing the source code of a provided function.
function add( x, y ) {
return x + y;
}
var str = function2string( add );
// e.g., returns 'function add( x, y ) {\n return x + y;\n}'
Notes
If called on built-in functions, functions created by
Function.prototype.bind(), or other non-JavaScript functions, the function returns a "native" function string similar to the following:"function foo() { [native code] }"For intrinsic object methods and functions,
foois the initial name of the function.If called on a function created by the
Functionconstructor, the function returns the source code of a synthesized function declaration having the name "anonymous" and using the provided parameters and function body.Starting in ES2018, the ECMAScript specification requires that the returned string contain the exact same source code as it was declared, including any whitespace and/or comments. If the host is unable to access the source code, the specification requires that the returned string be the native function string.
Examples
var ndarray = require( '@stdlib/ndarray/ctor' );
var erf = require( '@stdlib/math/base/special/erf' );
var daxpy = require( '@stdlib/blas/base/daxpy' );
var kebabcase = require( '@stdlib/string/kebabcase' );
var randu = require( '@stdlib/random/base/randu' );
var format = require( '@stdlib/string/format' );
var function2string = require( '@stdlib/function/to-string' );
var fcns = [
[ 'ndarray', ndarray ],
[ 'erf', erf ],
[ 'daxpy', daxpy ],
[ 'kebabcase', kebabcase ],
[ 'randu', randu ],
[ 'format', format ],
[ 'function2string', function2string ]
];
var i;
for ( i = 0; i < fcns.length; i++ ) {
console.log( format( 'Function: %s\n\n%s\n', fcns[ i ][ 0 ], function2string( fcns[ i ][ 1 ] ) ) );
}