rescue

Ubuntu 开机出现 grub rescue 的模式下修复

由 我们两清 提交于 2021-02-08 05:25:11
由于在Windows下面对分区修改，导致grub所在分区由sda3变成了sda2了，这样一来找不到grub了，Ubuntu开机就出现了 grub rescue > 在此情况下，可以如下解决，并不用重新安装系统 第一步，找出你的Linux盘在那个分区以及grub目录在什么位置。 如果你还记得最好，忘了也无所谓，使用下面命令逐个试探即可： grub rescue>ls 回车后，ls命令会列出所有磁盘分区信息，如: (hd0,4),(hd0,7),(hd0,8),(hd0,9) 循环使用如下命令，直至显示该分区所包含文件内容而不是unknown filesystem以及其他一些不正常信息 grub rescue>ls (hd0,0)/boot/grub (网上有写ls (hd0,0)/grub的，可能根据不同linux发行版本不同吧，Ubuntu 10.04是grub是放在/boot下面的。或者可以ls其他文件也一样) 假设我们试到(hd0,8)时，成功显示了文件内容，则表示。 第二步： grub rescue>set root=(hd0,8) //括号里分区为上一步尝试成功的分区，即linux grub 所在分区 grub rescue>set prefix=(hd0,8)/boot/grub 第三步： grub rescue>insmod normal.mod 网上有些insmod

What does the “=>” in “rescue Exception => e” do?

由 本小妞迷上赌 提交于 2021-01-27 16:45:03
问题 Given the example: def method_of_doom my_string = "I sense impending doom." my_string.ah_ha_i_called_a_nonexistent_method rescue NoMethodError => e: puts "PROBLEM: " + e.to_s rescue Exception: puts "Uhh...there's a problem with that there method." end On the line where it says: rescue NoMethodError => e: What is the '=>' doing? How is it different than this usage: module FighterValues BAMBOO_HEAD = { 'life' => 120, 'hit' => 9 } DEATH = { 'life' => 90, 'hit' => 13 } KOALA = { 'life' => 100,

What does the “=>” in “rescue Exception => e” do?

由 左心房为你撑大大i 提交于 2021-01-27 16:42:15
问题 Given the example: def method_of_doom my_string = "I sense impending doom." my_string.ah_ha_i_called_a_nonexistent_method rescue NoMethodError => e: puts "PROBLEM: " + e.to_s rescue Exception: puts "Uhh...there's a problem with that there method." end On the line where it says: rescue NoMethodError => e: What is the '=>' doing? How is it different than this usage: module FighterValues BAMBOO_HEAD = { 'life' => 120, 'hit' => 9 } DEATH = { 'life' => 90, 'hit' => 13 } KOALA = { 'life' => 100,

How to write down the rspec to test rescue block.?

由 你说的曾经没有我的故事 提交于 2020-06-08 08:13:06
问题 I have method like this def className def method_name some code rescue some code and error message end end So, How to write down the rspec to test rescue block..? 回答1: If you want to rescue, it means you expect some code to raise some kind of exception. You can use RSpec stubs to fake the implementation and force an error. Assuming the execution block contains a method that may raise def method_name other_method_that_may_raise rescue => e "ERROR: #{e.message}" end hook the stub to that method

How to write down the rspec to test rescue block.?

由 心已入冬 提交于 2020-06-08 08:12:18
问题 I have method like this def className def method_name some code rescue some code and error message end end So, How to write down the rspec to test rescue block..? 回答1: If you want to rescue, it means you expect some code to raise some kind of exception. You can use RSpec stubs to fake the implementation and force an error. Assuming the execution block contains a method that may raise def method_name other_method_that_may_raise rescue => e "ERROR: #{e.message}" end hook the stub to that method

Rescue_from doesn't rescue Timeout::Error from views or helpers

由 我怕爱的太早我们不能终老 提交于 2020-01-13 17:44:12
问题 I have an around_filter in my application controller to encase all actions in a timeout block, so that actions fail before hitting the 30 second Heroku limit. I also have a rescue_from Timeout::Error to cleanly rescue these timeouts. Unfortunately, the rescue_from only works some of the time. It works fine if the timeout occurs while executing within the controllers, but fails to rescue if the timeout happens within a view or a helper. Neither Interrupt nor SignalException, both of which

Does the Ruby rescue statement work with require?

由 一个人想着一个人 提交于 2019-12-22 08:48:33
问题 Does the Ruby rescue statement modifier work with require ? irb(main):001:0> require 'a' rescue nil LoadError: no such file to load -- a from (irb):1:in `require' from (irb):1 from :0 回答1: You can rescue from a LoadError you just need to use the begin/end style and not use the inline rescue : This works as you expect: begin require 'a' rescue LoadError => ex puts "Load error: #{ex.message}" end 来源： https://stackoverflow.com/questions/12750546/does-the-ruby-rescue-statement-work-with-require

Rescue all errors of a specific type inside a module

由 点点圈 提交于 2019-12-22 05:16:35
问题 I have a module in which I am performing all of my encryption/decryption tasks for a project. I would like to catch any OpenSSL::Cipher::CipherError exceptions that occur in this module so that I can handle them. Is it possible to do something like rescue_from OpenSSL::Cipher::CipherError, :with => :cipher_error inside of a module? 回答1: I've investigated a little and came with a solution. You said you have a module in which you do your encryption. I'm guessing that module represents a

Ruby Timeout::timeout doesn't fire Exception and doesn't return what documented

由 人走茶凉 提交于 2019-12-21 04:01:32
问题 i have this piece of code: begin complete_results = Timeout.timeout(4) do results = platform.search(artist, album_name) end rescue Timeout::Error puts 'Print me something please' end I then launch the method containing this code, and well, here is the beginning of a stack trace: Exception message : execution expired Exception backtrace : /***/****/.rvm/rubies/ruby-1.8.7-p302/lib/ruby/1.8/timeout.rb:64:i So i naively thinks that my call timeouted. But 'Print me something please' is never

work with rescue in Rails

由 匆匆过客 提交于 2019-12-20 10:55:08
问题 I am working with the following piece; def index @user = User.find(params[:id]) rescue flash[:notice] = "ERROR" redirect_to(:action => 'index') else flash[:notice] = "OK" redirect_to(:action => 'index') end Now I either case whether I have a correct ID or not, I am always getting "OK" in my view, what am I doing wrong? I need that when I have no ID in the DB to show "ERROR". I have also tried to use rescue ActiveRecord::RecordNotFound but same happens. All help is appreciated. 回答1: All code
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