i'm working on statistics view via angular-chart shoppinglist-app. should show graph of spended costs every user year. how generate json chart:
$scope.data = { series: users, data: [] }; console.log(chartdata); $scope.load = function(){ for(var = 0; i< months.length; i++){ for(var z = 0; z < chartdata.length; z++){ var obj = chartdata[z]; if(obj.year == $scope.dt.getfullyear()){ if(obj.month == months[i]){ for(var t =0; t < users.length;t++){ if(obj.name == users[t]){ usercosts[t] = (usercosts[t] + obj.price); console.log(obj.price); console.log(usercosts); } } } } } console.log(usercosts); $scope.data.data.push({x:months[i],y: usercosts}); for(var p = 0; p < users.length; p++){ usercosts[p]=0; } } console.log($scope.data.data); }; the output in console looks this:
[0, 0] 44 [44, 0] [44, 0] [0, 0] [0, 0] 7 [7, 0] [7, 0] 20 [20, 0] [20, 0] 5 [5, 0] [5, 0] [0, 0] [0, 0] [0, 0] [0, 0] [0, 0] the array filled fine push statement :
$scope.data.data.push({x:months[i],y: usercosts}); just dont work right. "usercosts" in every line same value.... last one; in case 0. although push before go through next month. dont anymore , appreciate smart answers you. best wishes christoph
need understand when push usercosts array chartdata array not copy of usercosts reference array.
then later when set:
for(var p = 0; p < users.length; p++){ usercosts[p]=0; } you working same array reference got pushed other array.
changes reflected anywhere have reference.
very simple example:
var = [1]; var b = a; // looks simple copy alert( b[0] ); // alerts 1 // change value of b[0] b[0] = 100; alert( a[0]); // alerts 100 because , b references same array 
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