charlike/templates/node_modules/es5-ext/function/is-function.js

Small, fast, simple and streaming project scaffolder for myself, but not only. Supports hundreds of template engines through the @JSTransformers API or if you want custom `render` function passed through options

'use strict';

var toString = Object.prototype.toString

  , id = toString.call(require('./noop'));

module.exports = function (f) {
	return (typeof f === "function") && (toString.call(f) === id);
};