[mapguide-users] RE: How to sort a selection set

[soudemans]

Hmm, hadn't thought about it in that light.  But it seems you are
correct, I am sorting an array of JSON objects

 

Alright so I tried my hand at this, and to be honest it is a little over
my head.  I found a JavaScript function that I could use to sort the
values in the Array.  It looks like this:

 

var sort_by = function(field, reverse, primer){

     var key = function (x) {return primer ? primer(x[field]) :
x[field]};

          return function (a,b) {

                var A = key(a), B = key(b);

                return ((A < B) ? -1 : (A > B) ? +1 : 0) *
[-1,1][+!!reverse];

    }

};

 

And the suggested usage would be something like this:
// Provided example: Sort by city, case-insensitive, A-Z 
homes.sort(sort_by('city', false, function(a){return a.toUpperCase()}));


 

The following is what I basically put together.  Unfortunately I have no
clue what the primer is supposed to do so I went with the previous
example since it didn't matter if the main_ID was lower or upper case.
Alas it isn't working and I am not sure what is wrong or where to go
from here.  

 

results = results.sort(sort_by('MAIN_ID',false,function(a){return
a.toUpperCase()}));

 

Any thoughts? 

 

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