complete ts chapter - 4

Author: jinnatul

README.md

@@ -5,7 +5,7 @@
 | 1: Getting started with TypeScript | [Readme](/chapters/1/readme.md) |
 | 2: Why and when to use TypeScript | [Readme](/chapters/2/readme.md) |
 | 3: TypeScript Core Types | [Readme](/chapters/3/readme.md) |
-| 4: Arrays | [Readme]() |
+| 4: Arrays | [Readme](/chapters/4/app.ts) |
 | 5: Enums | [Readme]() |
 | 6: Functions | [Readme]() |
 | 7: Classes | [Readme]() |

chapters/4/app.ts

@@ -0,0 +1,16 @@
+let Inventory = [
+  {name: 'apples', quantity: 2},
+  {name: 'bananas', quantity: 0},
+  {name: 'cherries', quantity: 5}
+];
+
+function findCherries(fruit) {
+  return fruit.name === 'cherries';
+}
+
+let oneDataOnArray = Inventory.filter((e) => e.name === 'apples')[0];
+console.log(oneDataOnArray); // { name: 'apples', quantity: 2 } 
+
+/******** Some how problem in .find() **********/
+//console.log(Inventory.find(findCherries)); // { name: 'cherries', quantity: 5 }
+//console.log(Inventory.find(findCherries)); // { name: 'cherries', quantity: 5 }