javascript - jQuery JSON array conversion -

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i trying convert ['peter', 'pan','michael','peter','pan'] [{'peter':2},{'pan':2},{'michael':1}] counts number of time name appears, print out.

but names[name] = 0; doesn't work, neither names[name] = names[name] + 1;

var data = ['peter', 'pan','michael','peter','pan']; // create temporary mapping holder. var tmp = {}; (var ii=0; ii < data.length; ii++) {    // set key 0 if doesn't exist.    if (!(tmp[data[ii]])) {       tmp[data[ii]]  = 0;    }    tmp[data[ii]] ++; } // create output array. var output = []; (var key in tmp) {     var pobj = {};     pobj[key] = tmp[key];     output.push(pobj); }

you can in single loop, thought might easier understand breaking up.


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