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pragyandas/partial application with promise.js

Created September 20, 2016 16:49
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partial application with promise created by pragyandas - https://repl.it/Ddl2/3
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partial application with promise.js
function bar(){
var args=[].slice.call(arguments);
var cb=args[args.length-1];
cb(null,"foo-bar");
}
var mapper={
foo:bar
}
function promisify(operator) {
return function() {
var args = [].slice.call(arguments);
return new Promise((resolve, reject)=>{
mapper[operator].apply(null, args.concat([(err, result)=>{
if (err) {
reject(err);
} else {
resolve(result);
}
}]));
});
};
}
var foo_promise=promisify("foo")();
foo_promise.then((res)=>console.log(res));
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