adding pivot files

Author: techslides

fastpivot.js

@@ -0,0 +1,40 @@
+function fastpivot(arr){ 
+	"use strict";
+	var obj={};
+	if(typeof arr!="string" && arr.length>0){
+
+		//get columns
+		var thekeys = Object.keys(arr[0]);
+
+		var temp={};
+
+		//loop through columns
+		thekeys.forEach(function(f){ 
+			temp[f]={}; 
+			temp[f]["_labels"]=[];
+			temp[f]["_labelsdata"]=[]; 
+			temp[f]["_data"]={}; 
+		});
+
+		//loop all rows and for each column, store values
+		arr.forEach(function(f,i){
+		    thekeys.forEach(function(a){
+		        var value=f[a];
+		        temp[a]["_data"][value]=(temp[a]["_data"][value] || 0)+1;
+		        temp[a]["_labels"][value]=null;
+		    });
+		});
+
+		//now reloop the columns to store unique values
+		thekeys.forEach(function(f){
+			for(var i in temp[f]["_data"]){
+				temp[f]["_labelsdata"].push(temp[f]["_data"][i]);
+			}
+			temp[f]["_labels"]=Object.keys(temp[f]["_labels"]);
+		});
+
+		obj._total=temp.length;
+		obj=temp;
+	}
+	return obj;
+}