Functional programming gets a bad wrap about being too hard for mere mortals to comprehend. This is nonsense. The concepts are actually quite simple to grasp.
The jargon is the hardest part. A lot of that vocabulary comes from a specialized field of mathematical study called category theory (with a liberal sprinkling of type theory and abstract algebra). This sounds a lot scarier than it is. You can do this!
All examples using ES6 syntax. wrap (foo) => bar means:
function wrap (foo) {
Douglas Crockford, author of JavaScript: The Good parts, recently gave a talk called The Better Parts, where he demonstrates how he creates objects in JavaScript nowadays. He doesn't call his approach anything, but I will refer to it as Crockford Classless.
Crockford Classless is completely free of class, new, this, prototype and even Crockfords own invention Object.create.
I think it's really, really sleek, and this is what it looks like:
function dog(spec) {
| app.directive('ngEnter', function() { | |
| return function(scope, element, attrs) { | |
| element.bind("keydown keypress", function(event) { | |
| if(event.which === 13) { | |
| scope.$apply(function(){ | |
| scope.$eval(attrs.ngEnter); | |
| }); | |
| event.preventDefault(); | |
| } |
| /* | |
| Get an array of parameter names for a function. | |
| Example: | |
| js> function f(a, b, c) { return a + b * c; } | |
| js> JSON.stringify(Function.parameters(f)); | |
| ["a","b","c"] | |
| */ | |
| Function.parameters = function(f) { |