File.append

Append the given data to the end of the file.

If the file does not already exist, it will be created.

If the data is a List, it will be joined by newlines \n.

$fruitFile = file'files:/fruit.txt'

// Single string
$fruitFile.append('apple\n')
$fruitFile.append('orange\n')

// List of lines
$fruitFile.append(['banana', 'pear'])

$fruitFile.read()
// apple
// orange
// banana
// pear