Question over Json sorting

http://www.devcurry.com/2010/05/sorting-json-array.html

I came across this article, i want few explantions over this article.

    function SortByName(x,y) {      
        return ((x.Name == y.Name) ? 0 : ((x.Name > y.Name开发者_如何学Go) ? 1 : -1 ));   
    }

arr.sort(SortByName);

1. What would be the arguements for arr.sort(x,y). What will be passed to the function from the JSON Object.

2. What does the SortByName function return. I don't understand the entire line. can anyone give me more details over this.

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What would be the arguements for arr.sort(x,y).

The two values in the array that are currently being compared

What does the SortByName function return

0, -1 or 1 depending on which of the two Name properties was bigger.

You should probably read the documentation for sort

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The argument of sort is a function that will be called several times with two different elements of the array, and will return 0 if the elements are equal, 1 if x > y and -1 if y > x.

return ((x.Name == y.Name) ? 0 : ((x.Name > y.Name) ? 1 : -1 ));  

is the very same as:

if (x.Name == y.Name) 
   return 0;
else
   if (x.Name > y.Name) 
      return 1;
   else
      return -1;