funstance

funstance

make an instance callable like a function

example

funstantiate a prototypical object

foo.js:

var inherits = require('inherits');
var Stream = require('stream');

module.exports = Foo;
inherits(Foo, Stream);

function Foo (x) {
    this.x = x;
}

Foo.prototype.beep = function () {
    this.emit('beep', 'boop');
};

main.js:

var funstance = require('funstance');
var Foo = require('./foo');

var obj = new Foo(4);
var fobj = funstance(obj, function (n) {
    return n * obj.x
})

console.log(fobj(111));
fobj.on('beep', console.log);
fobj.beep();

Note that .on() is defined all the way in EventEmitter, which is 3 times removed up the prototype chain from fobj, yet fobj.on() still works despite being a function.

$ node main.js
444
boop

methods

var funstance = require('funstance')

var fobj = funstance(obj, fn)

Return a function with all the properties and prototypical methods as obj. When fobj() is called, fn() will fire with the arguments and this set to the obj.

Note that obj shouldn't be an Array or possibly other built-in types aside from Object since some of them behave strangely for performance reasons.

install

With npm do:

npm install funstance

license

MIT