Name Promise variable equal to callback argument

Question

Name Promise variable equal to callback argument

I was wondering whether it would be ok to name the variable name for a promise just like the argument passed to a callback:

var dbItems = db.find();
dbItems.then(function(dbItems) {
    // Do some stuff with dbItems here...
});

I think that would be syntactically correct, but are there any arguments (like possible confusion or readability) against using this from the perspective of code style?

javascript
node.js
callback
styles
promise

Answer 1

var dbItems = db.find();
dbItems.then(function(dbItems) {
    // Do some stuff with dbItems here...
});

Is the same thing as writing:

var dbItems = db.find();
dbItems.then(function(xxxxx) {
    var dbItems = xxxxx;
    // Do some stuff with dbItems here...
});

which means that inside the anonymous function, dbItems is a completely different thing, and you do not have access to the "outer" dbItems variable.

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