循环数组以显示字符数

Question

给定一个包含一些单词的数组，循环遍历数组以显示每个单词中的字符数。

friends = ["Dan", "Mindy", "Suhasini", "Ryan"]

Answer 1

如果您希望返回显示长度的数组，则可以使用以下命令：

friends = ["Dan", "Mindy", "Suhasini", "Ryan"]
p friends.map { |friend| friend.length }

Answer 2

您可以使用数组显示字符数，如下所示。

friends = ["Dan", "Mindy", "Suhasini", "Ryan"]
def count_char(friends)
    count = 0
    friends.each do |word|
        count = word.length
        puts "'#{word}' has #{count} character(s)"
    end
end

count_char(friends)
=>
'Dan' has 3 character(s)
'Mindy' has 5 character(s)
'Suhasini' has 8 character(s)
'Ryan' has 4 character(s)

有关更多数组引用：http://ruby-doc.org/core-2.2.0/Array.html