Yashrai652 patch 1

01-js/easy/expenditure-analysis.js

@@ -1,15 +1,26 @@
-/*
-  Implement a function `calculateTotalSpentByCategory` which takes a list of transactions as parameter
-  and return a list of objects where each object is unique category-wise and has total price spent as its value.
-  Transaction - an object like { itemName, category, price, timestamp }.
-  Output - [{ category1 - total_amount_spent_on_category1 }, { category2 - total_amount_spent_on_category2 }]
 
-  Once you've implemented the logic, test your code by running
-  - `npm run test-expenditure-analysis`
-*/
 
 function calculateTotalSpentByCategory(transactions) {
-  return [];
+   var spendEstimates ={};
+
+  for(var i =0; i<transactions.length;i++){
+  var t= transactions[i];
+  if(spendEstimates[t.category])
+   spendEstimates[t.category]+= t.price;
+  else
+  spendEstimates[t.category]=t.price;
+  }
+  var arr = Object.keys(spendEstimates);
+  var answer =[];
+  for(var j=0;j<arr.length;j++){
+     var category = arr[j];
+     var obj ={
+        category:category,
+        totalSpent:spendEstimates[arr[j]]
+     }
+     answer.push(obj);
+  }
+  return answer;
 }
 
 module.exports = calculateTotalSpentByCategory;