在陣列紅寶石

查找文本我有一個代碼在陣列紅寶石

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

和不顯示的項的索引。爲什麼？

陣列看起來像

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"] 
]

而接下來如何顯示該項目？我的意思是a = conf_array[#{a}]表示語法錯誤。

我也試過

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

並再次將其簡化版，顯示找到的項目。任何建議？

來源

2017-02-24 mila002

「紅寶石」是一個你標籤，因爲它應該是。在問題標題中加入「Ruby」是多餘的。 –

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"]

來源

2017-02-24 12:15:52 mudasobwa

這有效。是否存在阻止查找文本的可能性「sn_server =」？ – mila002

'Enumerable＃grep'接受一個正則表達式。通過'/^server = /'在行的開始處查找'server'等等。邊距太小而無法解釋正則表達式如何在細節中工作。 – mudasobwa

在記事本++中，我寫的/^server = /不起作用。爲什麼？ – mila002

的問題是，你不叫String#include?，但Array#include?：

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

取出split("\t")。

讀取該文件到一個數組，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)

來源

2017-02-24 12:11:51

在陣列紅寶石

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