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Simple functional functions common to any development in Typescript or JavaScript.
## Number
- **inc**: Increase the value of a `number`.
- **dec**: Decrease the value of a `number`.
- **getRandom**: Returns a random number from a range, with an optional number of decimal places.
## Array
- **range**: Returns an array with a sequence.
- **uniqValuesArray**: Creates a duplicate-free version of an array.
- **deleteArrayElementByIndex**: Returns a copy of the array by removing one position by index.
## JSON
- **cloneJSON**: Clone JSON.
- **updateJSON**: Returns a JSON with an updated value.
- **getRandom**: Returns a random number from a range, with an optional number of decimal places.
- **deleteArrayElementByIndex**: Returns a copy of the array by removing one position by index.
## File
- **getIndexOfFileList**: Returns the index of an Array of Files from its name. If there are multiple files with the same name, the last one will be returned.
- **arrayFilesToFileList**: Returns a FileLists from an array containing Files.
## Example
```javascript
import * as fn from 'fnTools.js';
import {getRandom, range} from 'fnTools.js';
fn.getRandom(0, 6);
getRandom(0, 6);
// 2
fn.range(4);
range(4);
// [0, 1, 2, 3, 4]
```