プログラミングのお題スレ Part10

[0939 デフォルトの名無しさん 2018/04/22(日) 06:29:12.88 ID:xtwb4rw1]

>>928 Squeak Smalltalk

| arr |
arr := #(java rust ruby).
arr asCommaString. "=> 'java, rust, ruby' "
arr asCommaStringAnd. "=> 'java, rust and ruby' "

String streamContents: [:ss |
arr do: [:each | ss << each] separatedBy: [ss << ', ']
]. "=> 'java, rust, ruby' "