The following solution will delete files on a volume. If you don't know exactly what you're doing, you can run into big trouble with...
I play mp3 files on my car stereo that are stored on a SD-Card. When I've copied those mp3 files to the FAT formatted SD-Card...
Sometimes, through some firewall or proxy misconfiguration, you might have to deploy to a server that cannot access the git repository. Solution 1: HTTP Proxy (this is the preferred fix...
...SSH can be tunneled over an HTTP Proxy. For example, when the repo is on github, use this: Install socat Add a ~/.ssh/config on the target server(s) with permission...
...other attributes. A hack to fix this is to use faux string interpolation in a single-quoted :conditions string: class User < ActiveRecord::Base has_many :contracts has_one :current_contract...
...class_name => 'Contract', :conditions => '"#{Date.today.to_s(:db)}" BETWEEN start_date AND end_date' end The single quotes around the conditions are not a typo. It's to prevent Ruby from...
--without-opt-lib=${opt-dir}/lib --with-make-prog --without-make-prog --srcdir=. --curdir --ruby=/home/thomas/.rvm/rubies/ruby-1.8.7-p374/bin/ruby extconf.rb:15: undefined method `include_path' for Libv8:Module (NoMethodError) This is caused...
In order to fix that, remove all versions ob 'libv8': gem uninstall libv8 Select gem to uninstall: 1. libv8-3.3.10.2-x86_64-linux 2. libv8-3.11.8.17-x86_64-linux...
...will allow you to use ssh from anywhere. Simply paste the information provided by vagrant ssh-config to your ~/.ssh/config-File: vagrant ssh-config >> ~/.ssh/config Example: $ vagrant ssh-config
...a desired state. Upon creation Vagrant will set up a new VM and add a SSH-Key so you can ssh into the machine. Normally you would switch to the...
...you register a delegated event using on (or the deprecated delegate / live), it is somewhat hard to manually trigger these events manually, e.g. for testing. After trying jQuery's trigger...
...to no avail, I had success by using native Javascript methods to create and dispatch an event. For instance, to trigger a mousedown event: element = $('...').get(0); event = new MouseEvent...
...wanted autocompletion for paths from paths.rb in Cucumber? This card lets you write your steps like this: When I go to path *press tab now* # path is replaced with a...
...list of all known Cucumber paths This is how you do it (key shortcuts apply for TextMate2) Open the bundle editor (ctrl + alt + + B) Create a new Item ( + N), select...
While you can use Apache as a reverse proxy, it tries to be too smart. Try nginx instead, it's much simpler to set up. After struggling with Apache for...
...quite a while, since I simply could not make it pass through the Digest Authentication of my target host (that I proxied to), I switched to nginx. Here is what...
Sometimes you accidentally generate entries in the bash history that you do not want to have there (e.g. commands with credentials). Here's how to remove single entries.
...look at the bash history with the history command. To see e.g. the last 5 entries, use history | tail -n 5: >history | tail -n 5 1994 my-secret-command...
...entered the unmistakeable file extension like material_orders_controller.rb, this may help you: Causing the Problem Sometimes you create a new file and forget to enter the ending like material_orders_controller...
...Rubymine handles such files per default as simple txt files. You delete this file and create a new one with correct ending: material_orders_controller.rb. But still Rubymine treats this file as...
...look like this: # Begin Whenever generated tasks for: project100 MAILTO="log@example.com" MAILFROM="cron@example.com" # When server is booting up, ensure Sidekiq is running @reboot start_sidekiq 23 8 * * * baz 30 * * * * plop...
...generated tasks for: project100 While you can human-parse this one easily, crontabs with several lines are hard to read. The following command will ignore any comments or environment variables...
The following snippet demonstrates how you could create excel files (with spreadsheet gem) and format columns so that they follow a specific number format like currencies or dates do.
require 'spreadsheet' Spreadsheet.client_encoding = 'UTF-8' book = Spreadsheet::Workbook.new sheet1 = book.create_worksheet :name => 'test' money_format = Spreadsheet::Format.new :number_format => "#,##0.00 [$€-407]" date_format = Spreadsheet::Format.new :number_format => 'DD.MM.YYYY...
Isolate scopes offer three kinds of variable binding. One of them is &, allowing to bind a property of the isolate scope to a function in the parent scope. Example:
@app.directive 'panel', -> scope: parentFn: '&proxy' link: (scope) -> scope.parentFn(arg1: 'first', arg2: 'second') In this dumb example, the panel directive will call its scope's parentFn() function with two arguments...
...the details container: {{ content }} ngClass will be taking care of updating the details container's slide-index-N class; e.g. when the currentSlideIndex changes from 4 to 5, the slide...
...index-4 class is being removed and the slide-index-5 class is being added. CSS With ngAnimate included, ngClass will add certain animation classes. In the above example, it...
...Rails 3.2, Rails 4.2 and Rails 5.0. Basic Usage Our example will be a simple address book: class Contact < ActiveRecord::Base validates_presence_of :name, :street, :city, :email end
...create a new class ContactFilter that will describe the searchable columns: class ContactFilter include Minidusen::Filter filter :text do |scope, phrases| columns = [:name, :email] scope.where_like(columns => phrases) end
ImageMagick can automatically crop surrounding transparent pixels from an image: convert input.png -trim +repage output.png You need to +repage to update the image's canvas, or applications will...
...be randomly confused. Trimming specific colors is also possible, see the documentation. Resizing into a box Occasionally, you want to resize an image to a maximum width or height, and...
SudoSlider is a simple yet powerful content slider that makes no (or very few) assumptions about your markup and is very customizable. You can basically embed any HTML into the...
...slides, so you can mix images, videos, texts, and other stuff. Check out the demos. Please note: There is a ton to configure. Check the demos and read the docs...
If you save a non-standard object (not a String or Fixnum, etc) like the AwesomeClass from your application in the session of visitors be prepared that some time you...
...will get this exception: ActionController::SessionRestoreError: Session contains objects whose class definition isn't available. Remember to require the classes for all objects kept in the session. (Original exception: ...)
Sometimes your code has long lines: describe 'foo' do describe 'bar' do really_long_line_really_long_line_really_long_line another_line When you're working with multiple editor...
...really_long_line_really_long_| another_line | To help with this you can activate Soft wraps in the RubyMine options under General → Editor . Your code will now look like this...
...class for the presenter instead of extending objects DCI-style. This allows them to add statically-defined callbacks and validations from ActiveModel with the syntax that we know and love...
...question: We should be clear about why a form model is a better place for screen-specific code than a plain old controller. Weren't controllers originally the place for...
...it might be unavoidable to have different CSS rules for Internet Explorer than for sane browsers. Using Sass, this can be achieved in a relatively non-hackish way without CSS...
Step 1 Move your current Sass file into a partial. Let's assume it was called screen.sass. Rename it _screen.sass. Step 2 Create two new Sass files:
If your requests blow up in Ruby or CURL, the server you're connecting to might only support requests with older SSL/TLS versions. You might get an error like: OpenSSL...
...SSL::SSLError: SSL_connect SYSCALL returned=5 errno=0 state=unknown state SSL Server Test This SSL Server Test can help finding out which SSL/TLS versions the server can handle...
...file, that don't use Ruby's logger utility, it is often useful to sync them. So other process can read the output just in time. Example with enabled sync...
File.read(log_path) #=> "Some log message\nSome other message\n" Example with disabled sync (default) log_path = '/tmp/some_log.log' log_file = File.open(log_path, 'a+') log_file.puts('Some log message')
...and rspec-rails >= 2 for Rails 3. Here are some hints to get started: In RSpec 2 the executable is rspec, not spec. RSpec and rspec-rails have been completely...
...refactored internally. All RSpec classes have been renamed from Spec::Something to RSpec::Something. This also means that every require 'spec/something' must now be require 'rspec/something'. In spec_helper.rb, Spec::Runner.configure...