using javascript callback style error handling

async,tipjs,async-await,promise,callback

getData(someParameter, function(err, result) {
    if(err !== null) {
        // do something like calling the given callback function and pass the error
        getMoreData(a, function(err, result) {
            if(err !== null) {
                // do something like calling the given callback function and pass the error
                getMoreData(b, function(c) {
                    getMoreData(d, function(e) {
                        if(err !== null ) {
                            // you get the idea?
                        }
                    })
                });
            }
        });
    }
});

Async await in javascript

Convert Array-like to True Array

group by property javascript use reduce

Hàm lày ngày trong tuần javascript

Object.keys và Object.getOwnPropertyNames