Create sorting_an_array_of_objects.js

A Javascript algorithm

Author: kishansinha181

Diff for: sorting_an_array_of_objects.js

@@ -0,0 +1,53 @@
+/* Suppose we have an araay of Objects with various properties.
+   We want to sort the array of those similar objects based on a particular property
+   or also a combonation of two or more properties.
+   We will achieve this using the Compare function*/
+  
+  
+// An array of a few Soccer Players
+
+const players = [
+  { name: 'Cristiano Ronaldo', team: 'Juventus', age:35 },
+  { name: 'Lionel Messi', team: 'Barcelona', age:32 },
+  { name: 'Eden Hazard', team: 'Real Madrid', age: 29 },
+  { name: 'Neymar Jr', team: 'Paris Saint-German', age:28 },
+];
+//Note that these statistics can change, these are correct as per 3 May,2020
+
+/*We can use the following compare function to sort this array of players according to their teams*/
+
+function compare(a, b) {
+  // Use toUpperCase() to ignore character casing
+  const teamA = a.team.toUpperCase();
+  const teamB = b.team.toUpperCase();
+
+  let comparison = 0;
+  if (teamA > teamB) {
+    comparison = 1;
+  } 
+  else if (teamA < teamB) {
+    comparison = -1;
+  }
+  //If teamA===teamB, no change occurs
+  
+  return comparison;
+}
+//NOTE: A positive value of the return value means teamA comes after teamB and vice-versa
+
+//Function Call
+
+players.sort(compare);
+
+/*returns:-
+ (4) [{…}, {…}, {…}, {…}]
+0: {name: "Lionel Messi", team: "Barcelona", age: 32}
+1: {name: "Cristiano Ronaldo", team: "Juventus", age: 35}
+2: {name: "Neymar Jr", team: "Paris Saint-German", age: 28}
+3: {name: "Eden Hazard", team: "Real Madrid", age: 29}
+length: 4
+__proto__: Array(0)
+*/
+
+//Similarly 'compare' function can also be used to sort the players according to their age : Try to figure out yourself :p
+  
+