在阵列红宝石

查找文本我有一个代码在阵列红宝石

require 'rubygems' 
conf_array = [] 
File.open("C:/My Program Files/readme.txt", "r").each_line do |line| 
conf_array << line.chop.split("\t") 
end 

a = conf_array.index{|s| s.include?("server =")} 
puts a

和不显示的项的索引。为什么？

阵列看起来像

conf_array = [ 
    ["# This file can be used to override the default puppet settings."], 
    ["# See the following links for more details on what settings are available:"], 
    ["# - docs.puppetlabs.com/puppet/latest/reference/config_important_settings.html"], 
    ["# - docs.puppetlabs.com/puppet/latest/reference/config_about_settings.html"], 
    ["# - docs.puppetlabs.com/puppet/latest/reference/config_file_main.html"], 
    ["# - docs.puppetlabs.com/references/latest/configuration.html"], ["[main]"], 
    ["server = server.net.pl"], 
    ["splay = true"], 
    ["splaylimit = 1h"], 
    ["wiatforcert = 30m"], 
    ["http_connect_timeout = 2m"], 
    ["http_read_timeout = 30m"], 
    ["runinterval = 6h"], 
    ["waitforcert = 30m"] 
]

而接下来如何显示该项目？我的意思是a = conf_array[#{a}]表示语法错误。

我也试过

new_array = [] 
new_array = conf_array.select! {|s| s.include?("server =")}

并再次将其简化版，显示找到的项目。任何建议？

来源

2017-02-24 mila002

“红宝石” 是一个你标签，因为它应该是。在问题标题中加入“Ruby”是多余的。 –

完美使用案例Enumerable#grep

File.open("C:/My Program Files/readme.txt", "r") 
    .each_line 
    # no need to .flat_map { |l| l.split(/\t/) } 
    .grep /server =/ 
#⇒  ["server = server.net.pl"]

来源

2017-02-24 12:15:52 mudasobwa

这有效。是否存在阻止查找文本的可能性“sn_server =”？ – mila002

'Enumerable＃grep'接受一个正则表达式。通过'/^server = /'在行的开始处查找'server'等等。边距太小而无法解释正则表达式如何在细节中工作。 – mudasobwa

在记事本++中，我写的/^server = /不起作用。为什么？ – mila002

的问题是，你不叫String#include?，但Array#include?：

["server = something.pl"].include?('server = ') 
# false 
"server = something.pl".include?('server = ') 
# true

取出split("\t")。

读取该文件到一个数组，你可以使用：

conf_array = File.readlines("C:/My Program Files/readme.txt")

或

conf_array = File.readlines("C:/My Program Files/readme.txt").map(&:chomp)

来源

2017-02-24 12:11:51

在阵列红宝石

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