I've come across a code similar to the one below on several occasions recently.
One thing to observe is that modelMapper, viewMapper, and source are all defined as local variables but are not used anywhere else, except for being keys in the return object.
An interesting point to mention is that $parse returns a function, and only keys related to a returned function are declared as local variables - itemName is an exception.
parse:function (input) {
var match = input.match(TYPEAHEAD_REGEXP), modelMapper, viewMapper, source;
if (!match) {
throw new Error("Error...");
}
return {
itemName:match[3],
source:$parse(match[4]),
viewMapper:$parse(match[2] || match[1]),
modelMapper:$parse(match[1])
};
}
What is the significance of defining these local variables?