如何在Ruby中爲python「for-each」做些什麼？

Question

foo = [3, 6, 3] 
for a in foo: 
    print a 

我該如何做到這一點在紅寶石？

Answer 1

list = %w(a b c) 

# there's a for statement but nobody likes it :P 
for item in list 
    puts item 
end 

# so you use the each method with a block instead 

# one-liner block 
list.each { |item| puts item } 

# multi-line block 
list.each do |item| 
    puts item 
end 

Answer 2

foo = [3, 6, 3] 
foo.each do |a| 
    puts a 
end 

Answer 3

foo = [1, 2, 3] 
foo.each do |x| 
    puts x 
end 

Answer 4

你已經有兩個關於正確答案 「爲」 -loop。但究竟你的榜樣，我將使用：

puts foo 

您也可以在這種情況下使用該看跌期權功能：

puts array.map { |i| ...some code...; x } 

代替

array.each { |i| ...some code...; puts x } 

例如，如果你只需要撥一次即可。