Question

我构建了一个数组：

arr = [s1 + s2 + s3 + s4 + s5 + s6]

我想将该数组写入HTML文件。如果我这样做，阵列的所有元素都将被打印出来。

现在，我希望它们之间用新的代码写成，如下所示：

s1 + s2

s3 + s4

s5 + s6

Answer 1

您可以使用Array#each_slice：

arr = ["s1" , "s2" , "s3" , "s4" , "s5" , "s6"]
arr.each_slice(2) { |a| p a }
# ["s1", "s2"]
# ["s3", "s4"]
# ["s5", "s6"]

或更准确地说：

file = File.open("abc.html", "w")
arr.each_slice(2) { |a| file.puts a.first + " + " + a.last }
file.close

File.read("abc")
# s1 + s2
# s3 + s4
# s5 + s6

Answer 2

> arr = ["s1" , "s2" , "s3" , "s4" , "s5" , "s6"]
> arr.each_slice(2){|a| p "#{a[0]} + #{a[1]}"}
#output:
"s1 + s2"
"s3 + s4"
"s5 + s6"

Answer 3

我假设您的意思是arr = [s1, s2, s3, s4, s5, s6]

尝试

your_file.puts arr[0] + " + " + arr[1]
your_file.puts
your_file.puts arr[2]  + " + " +  arr[3]
your_file.puts
your_file.puts arr[4]  + " + " +  arr[5]

空白puts将在每行之间添加换行符

Answer 4

arr = %w(s1 s2 s3 s4 s5 s6)
while arr.length != 0
    puts arr.shift(2).join("+")
end

输出：

s1+s2
s3+s4
s5+s6

数组中的换行符

4 个答案: