Count elements in an array

roeib · web-flow · commit dcb6e6b59bf2 · 2019-11-17T13:44:42.000+02:00
diff --git a/README.md b/README.md
@@ -227,3 +227,27 @@ function func(a,b){
 console.log(shuffle);
 ```
 
+#  Count elements in an array
+
+
+```javascript
+const myFruits = ['Apple','Orange','Mango','Banana','Apple','Apple','Mango']
+
+//first option
+const countMyFruits = myFruits.reduce((countFruits,fruit) => {
+  countFruits[fruit] = ( countFruits[fruit] || 0 ) +1;
+  return countFruits
+ },{} )
+ console.log(countFruits)
+ // { Apple:3, Banana:1, Mango:2, Orange:1 }
+ 
+ //seconf option
+ const fruitsCounter = {};
+ 
+ for( const fruit of myFruits ){
+   fruitsCounter[fruit] = fruitsCounter[fruit] ? fruitsCounter[fruit]+1 :1;
+ }
+  
+ console.log(fruitsCounter)
+ // { Apple:3, Banana:1, Mango:2, Orange:1 }
+```
