19/02/22 06:09:02.19 HhIJRo4K.net
>>279
Smalltalk (Pharo 7)
#('apple' 'banana' 'orange' 'mango') asCommaStringAnd
==> 'apple, banana, orange and mango'
#('apple' 'banana') asCommaStringAnd
==> 'apple and banana'
#('apple') asCommaStringAnd
==> 'apple'