Merge pull request #472 from kriadmin/patch-5

Create pluralize.md
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Angelos Chalaris
2018-01-03 14:29:31 +02:00
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# pluralize
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 = 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(2,'apple'); // 'apples'
pluralize(0,'apple','apples'); // Gives error
pluralize(-3,'apple','apples'); // Gives error
```