Javascript syntax : Nested callback

Question

I would like to know if there is a way to write the following code quicker.

items.getAll() callback has to take the same arguments as database.query() callback. So I just would like to "rethrow" the callback without changing it.

items.getAll = function(callback){
    database.query('SELECT * FROM items', function(err, rows){
        callback(err, rows);
    });
};

Pointy · Accepted Answer · 2014-07-19 19:11:12Z

1

Just pass the callback directly:

    database.query('SELECT * FROM items', callback);

An even shorter way available in modern JavaScript runtimes (that is, not old IE):

items.getAll = database.query.bind(database, "SELECT * FROM items");

answered Jul 19, 2014 at 19:11

Pointy

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2 Comments

Pointy Over a year ago

@Nicolas no problem - see the addition I made to the answer.

Nicolas Over a year ago

Ok thx, as it's server side code, I should not have compatibility issues. Will read a bit about bind().

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