javascript - Function that receives a parameter and returns it with no modifications -

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i can not figure out usefulness function: 

// quick function retrieve parameters in format compatible ajax request var getrequestparameters = function(params){     return params; };

i'm seeing in web project, used before every $.ajax() call. can please enlighten me?

it's extension point. serves central point add/remove/customize parameters @ point in future if needs of project change. @ present, doesn't anything, apparently it's there on theory may something.

you've said it's used before every $.ajax call, suggests you're using jquery. means it's bit redundant jquery's own ajaxsend, that's not big deal.

for example, suppose @ point in future needed add unique identifier every ajax request sent. you'd have modify 1 function:

var id = 0; var getrequestparameters = function(params){     params.__uniqueid = ++id; // or perhaps copy params first     return params; };

...and you'd have on of ajax requests.


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