Update pluralize.md

snippets/pluralize.md

@@ -1,17 +1,19 @@
 # pluralize
 
-Checks if the provided `num` is equal to `1`. If yes return 
+If `num` is greater than `1` returns the plural form of the given string, else return the singular form.
+
+Check if `num` is positive. Throw an appropriate `Error` if not, return the appropriate string otherwise.
+Omit the third argument, `items`, to use a default plural form same as `item` suffixed with a single `'s'`.
 
 ``` js
-const pluralize = (num, item, items) => {
- if (num <= 0)  throw new Error(`num takes value greater than equal to 1. Value povided was ${num} `)
-	else  return num === 1 ? item : items
-}
+const pluralize = (num, item, items = item+'s') => 
+  num <= 0 ? (() => {throw new Error(`'num' should be >= 1. Value povided was ${num}.`)})() : num === 1 ? item : items;
 ```
 
 ```js
-pluralize(1,'apple','apples'); //'apple'
-pluralize(3,'apple','apples'); //'apples'
-pluralize(0,'apple','apples'); //Gives error
-pluralize(-3,'apple','apples'); //Gives error
+pluralize(1,'apple','apples'); // 'apple'
+pluralize(3,'apple','apples'); // 'apples'
+pluralize(2,'apple'); // 'apples'
+pluralize(0,'apple','apples'); // Gives error
+pluralize(-3,'apple','apples'); // Gives error
 ```