README
in-js
in-js is a sweet.js macro for JavaScript which adds a keyword, in?, to the language.
Examples
The file examples.js in this repo contains a few examples. To run that file, run make run-examples in the root of this repo.
var x = 1, y = [1, 2, 3];
if (x in? y) {
console.log("1 is in the list [1, 2, 3]");
}
// 1 is in the list [1, 2, 3]
var frameworks = [
{language: "ruby", "name": "rails"},
{language: "clojure", name: "compojure"},
{language: "javascript", name: "koa"},
{language: "python", name: "django"},
];
var filtered = frameworks.filter(function(framework){
return framework.language in? ['ruby', 'javascript'];
});
console.log(filtered);
/*
[ { language: 'ruby', name: 'rails' },
{ language: 'javascript', name: 'koa' } ]
*/
Tests
make test