gets an object with possible mathematical operations in Pivot
$$("pivot").operations = {
sum: function sum(args) {
var sum = 0;
for (var i = 0; i < args.length; i++) {
var value = args[i];
value = parseFloat(value, 10);
if (!window.isNaN(value)) sum += value;
}
return sum;
},
count: function count(args) {
return args.length;
},
max: function max(args) {
if (args.length == 1) return args[0];
return Math.max.apply(this, args);
},
min: function min(args) {
if (args.length == 1) return args[0];
return Math.min.apply(this, args);
}
}
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