Bringing power of javascript generators into normal javascript environment
npm install genify
var Q = require('q');
var fs = require('fs');
var genify = require('genify');
// wrap your object into genify function
var object = genify({
concatFiles: function * (file1, file2, outFile) {
file1 = yield Q.nfcall(fs.readFile, file1);
file2 = yield Q.nfcall(fs.readFile, file2);
var concated = file1 + file2;
yield Q.nfcall(fs.writeFile, outFile, concated);
return concated;
}
});
// concatFiles is generator function, and it is using generator power to do some things,
// and here you are using that power inside normal javascript environment,
// handling results and errors using promises
object.concatFiles('./somefile1.txt', './somefile2.txt', './concated.txt').then(function (res) {
// do something with result
}, function (err) {
// do something with error
});throwable: (true|false)
After some error occours in generator function, by default error will be passed to caller as rejected promise.
If you want for error to be thrown instead, you should set throwable option to true.
genify(someObject, {
// errors will be thrown
throwable: true
})MIT