@stdlib/complex-base-cast-return

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castReturn

Wrap a function and cast a function's return value to a complex number.

Installation

npm install @stdlib/complex-base-cast-return

Usage

var castReturn = require( '@stdlib/complex-base-cast-return' );

castReturn( fcn, nargs, ctor )

Returns a function which wraps a function and casts a function's return value to a complex number.

var Complex64 = require( '@stdlib/complex-float32-ctor' );
var addf = require( '@stdlib/math-base-ops-addf' );

var f = castReturn( addf, 2, Complex64 );
// returns <Function>

The function accepts the following arguments:

• fcn: the function to wrap.
• nargs: the number of arguments to be provided to the wrapped function.
• ctor: complex number constructor for converting real numbers to complex numbers.

Notes

• The returned function assumes that the wrapped function returns either a real or complex number.
• The returned function assumes that, if a return value is non-numeric (i.e., not of type number), then the return value is a complex number. The returned function does not verify that non-numeric return values are, in fact, complex number objects. The returned function returns non-numeric return values from the wrapped function without modification.

Examples

var Complex64 = require( '@stdlib/complex-float32-ctor' );
var addf = require( '@stdlib/math-base-ops-addf' );
var realf = require( '@stdlib/complex-float32-real' );
var imagf = require( '@stdlib/complex-float32-imag' );
var castReturn = require( '@stdlib/complex-base-cast-return' );

var f = castReturn( addf, 2, Complex64 );

// ...

var z = f( 3.0, 4.0 );
// returns <Complex64>

var re = realf( z );
// returns 7.0

var im = imagf( z );
// returns 0.0

console.log( '%d + %di', re, im );
// => '7 + 0i'

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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

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