In my journey to learns Javascript, i see often things like this:
Express.js
router.get('/', function (req, res) {
res.send('Hello World');
The method get is passing parameters (req, res, but there are more) to the
anonymous function. Reading the Express.js API could find something about.
How do I know which parameters are usually passed back ? What am I missing
here ?
Another example, from MongoDB:
MongoClient.connect(url, function(err, db) {
assert.equal(null, err);
console.log("Connected correctly to server");
Again, reading the API, could not find something about what the connect
method pass back to the anonymous function , in this case err and db. What
am I missing about the Javascript basic concepts ?
Thanks in advance.
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