Ruby-on-rails 如何找到数组类的长度？

How to find the length of an array class?

提问by Milan

$param = k.chomp.split("\t")

How can I find the length of $paramgiven that it is an array? actually when I'm writing

我怎样才能找到$param给定它是一个数组的长度？实际上在我写作的时候

puts $param.class

I got the o/p like Array. Now how do I find the length of this array?

我得到了像 Array 一样的 o/p。现在我如何找到这个数组的长度？

I tried $param.lengthbut it's not working.

我试过了，$param.length但它不起作用。

回答by Salil

Ref Arrayclass

引用数组类

k = "This \t is \t just \t testing"
$param=k.chomp.split("\t")
array_length= $param.length   #or $param.size
puts "length of $param is : #{array_length}"

o/p

o/p

length of $param is : 4

回答by bradgonesurfing

Try using .sizelike this:

尝试使用.size这样的：

$param.size