ruby 在字符串数组中查找字符串的最快方法
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Fastest way to find a String into an array of string
提问by Cocotton
The script has to verify if one predefined IP is present in a big array of IPs. Currently I code that function like this (saying that "ips" is my array of IP and "ip" is the predefined ip)
该脚本必须验证一个预定义的 IP 是否存在于一大组 IP 中。目前我编码的功能是这样的（说“ips”是我的IP数组，“ip”是预定义的IP）
ips.each do |existsip|
if ip == existsip
puts "ip exists"
return 1
end
end
puts "ip doesn't exist"
return nil
Is there a faster way to do the same thing?
有没有更快的方法来做同样的事情？
Edit : I might have wrongly expressed myself. I can do array.include? but what I'd like to know is : Is array.include? the method that will give me the fastest result?
编辑：我可能错误地表达了自己。我可以做array.include吗？但我想知道的是：是array.include吗？能给我最快结果的方法是什么？
回答by Aliaksei Kliuchnikau
回答by ericraio
You could use the Array#include method to return you a true/false.
您可以使用 Array#include 方法返回真/假。
http://ruby-doc.org/core-1.9.3/Array.html#method-i-include-3F
http://ruby-doc.org/core-1.9.3/Array.html#method-i-include-3F
if ips.include?(ip) #=> true
puts 'ip exists'
else
puts 'ip doesn\'t exist'
end
回答by Don Cruickshank
A faster way would be:
更快的方法是：
if ips.include?(ip)
puts "ip exists"
return 1
else
puts "ip doesn't exist"
return nil
end
回答by Peter Ehrlich
have you tried the Array#include? function?
你试过 Array#include 吗？功能？
http://ruby-doc.org/core-1.9.3/Array.html#method-i-include-3F
http://ruby-doc.org/core-1.9.3/Array.html#method-i-include-3F
You can see from the source it does almost exactly the same thing, except natively.
您可以从源代码中看到它几乎完全相同，除了本机。
回答by dku.rajkumar
ips = ['10.10.10.10','10.10.10.11','10.10.10.12']
ip = '10.10.10.10'
ips.include?(ip) => true
ip = '10.10.10.13'
ips.include?(ip) => false
