Choongkyu

ActiveRecord::RecordNotFound in CommentsController#destroy
Couldn't find Comment with 'id'=6 [WHERE "comments"."article_id" = ?]

Extracted source (around line #35):
33
34
35
36
37
38

Choongkyu

<%= form_for(@business) do |f| %>
  <% if @business.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(@business.errors.count, "error") %> prohibited this business from being saved:</h2>

      <ul>
      <% @business.errors.full_messages.each do |message| %>
        <li><%= message %></li>
      <% end %>
      </ul>

Choongkyu

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController

@property (weak, nonatomic) IBOutlet UIWebView *myWebView;

- (IBAction)refreshButton:(UIButton *)sender;
@end

Choongkyu

zebralight1@sample_app:~/workspace (master) $ bundle exec rake test
/usr/local/rvm/gems/ruby-2.2.1/gems/activesupport-4.2.2/lib/active_support/dependencies.rb:274:in `require': cannot load such file -- guard (LoadError)
        from /usr/local/rvm/gems/ruby-2.2.1/gems/activesupport-4.2.2/lib/active_support/dependencies.rb:274:in `block in require'
        from /usr/local/rvm/gems/ruby-2.2.1/gems/activesupport-4.2.2/lib/active_support/dependencies.rb:240:in `load_dependency'
        from /usr/local/rvm/gems/ruby-2.2.1/gems/activesupport-4.2.2/lib/active_support/dependencies.rb:274:in `require'
        from /usr/local/rvm/gems/ruby-2.2.1/gems/guard-minitest-2.4.4/lib/minitest/guard_minitest_plugin.rb:4:in `<top (required)>'
        from /usr/local/rvm/gems/ruby-2.2.1/gems/activesupport-4.2.2/lib/active_support/dependencies.rb:274:in `require'
        from /usr/local/rvm/gems/ruby-2.2.1/gems/activesupport-4.2.2/lib/active_support/dependencies.rb:274:in `block in require'
        from /usr/local/rvm/gems/ruby-2.2

Choongkyu

GEM
  remote: https://rubygems.org/
  specs:
    actionmailer (4.2.2)
      actionpack (= 4.2.2)
      actionview (= 4.2.2)
      activejob (= 4.2.2)
      mail (~> 2.5, >= 2.5.4)
      rails-dom-testing (~> 1.0, >= 1.0.5)
    actionpack (4.2.2)

Choongkyu

# Connect to a server

redis-cli server

# Make an insert

set key value

# Make multiple insert

Choongkyu

Installing Kubernetes on ArchLinux

Packages

pacman -S curl docker ebtables ethtool wget unzip

Also cfssl is needed but available on AUR, using pacaur

pacaur -S cfssl

Choongkyu

Installing Kubernetes on ArchLinux

Packages

pacman -S curl docker ebtables ethtool wget unzip

Also cfssl is needed but available on AUR, using pacaur

pacaur -S cfssl

Choongkyu

class Solution:
    def titleToNumber(self, s: str) -> int:
        out = 0
        for i, ch in enumerate(s):
            v = ord(ch) - 64
            place = len(s) - i - 1
            out += (v * 26**place)
        return out

Choongkyu

Note: I'm currently taking a break from this course to focus on my studies so I can finally graduate

Table of Contents

1. Overview
2. Introduction
3. Interactive Start
4. Linux and Server-Side Javascript
5. Linux Command Line
6. Linux Development Environment