Ruby 初心者スレッド Part 66

[557 デフォルトの名無しさん (ﾜｯﾁｮｲ 632c-aH+M) 2020/06/11(木) 02:39:40.64 ID:J++l+lJF0]

ary = "abc".each_char.inject( [ ] ) do |ary, char|
if ary.length == 0
ary.push char
else
ary.push( ary.last + char )
end
end

p ary #=> ["a", "ab", "abc"]