Angular's location provider stalls links to the current URL, i.e. window.location. As soon as the $location service is activated in an Angular app, it will intercept links. The click...
...your interaction with the browser history (i.e. you're just using Angular as JS sugar on your page), Angular will create the above issue as soon as you use anything...
This is an attempt to list some of those things: On the server Always optimize: Don't do stupid things with the database. Avoid "n + 1" queries. Don...
...Use form models. Optimize on demand: Don't optimize without knowing what's actually slow. Measure first, for example by using a performance monitoring tool like NewRelic, Scout, AppSignal, Skylight...
The link contains a simple shell script to push a cleanup policy for gitlab repositories in a group. Please mind that this will overwrite the configuration for all the repositories...
...with the given settings...
...an error in the User#name method) you will end up with a confusing stacktrace that looks like you have an error in your render call. If this happens to...
...you, temporarily remove the annotation to see the correct error. Niklas opened an issue in rails, a fix is merged and will arrive in Rails >7.2.2.2 and...
If your shell seems frozen You probably pressed Ctrl-S which stops the buffer. Try Ctrl-Q to resume. If your shell behaves strangely (no input being displayed, strange character...
...Try typing this, followed by pressing the return key: reset That should clear the screen and reset output settings etc...
...to load fast it's recommended to optimize images. Ideally an image's file size should be as small as possible while still being of decent quality. This card demonstrates...
...tools for image optimization Use identify to fetch information about pictures. convert can change size/quality and strip meta information. Both commands are supplied by ImageMagick. $ identify in.jpg in.jpg JPEG 294x440...
When navigating back to a page that was received from a POST request, undesired side effects may happen. Therefore, modern browsers try to keep users from doing so, i.e. Firefox...
...an error page explaining what's wrong. If the user presses "Try Again", it shows an additional alert asking whether the user is certain. Solution If you need to circumvent...
...this matter, as the image rendering depends on multiple factors. At least the operation system, browser or image viewer software and monitor influence the resulting image colors on your screen...
...possibility to upload images, they will most likely contain tons of EXIF metadata and sometimes exotic color profiles like eciRGB. We want to get rid of the metadata, as it...
When searching for text in a MySQL table, you have two choices: The LIKE operator FULLTEXT indexes (which currently only work on MyISAM tables, but will one day work on...
...InnoDB tables. The workaround right now is to extract your search text to a separate MyISAM table, so your main table can remain InnoDB.) I always wondered how those two...
xterm by default uses black text on white background. To change that to something like "light gray on black", do a vim ~/.Xresources ...and put this in there: xterm*background...
xterm*foreground: lightgray Afterwards, feed these changes to your current X session: xrdb ~/.Xresources Any subsequent xterm will be colored white on black background. Hint: While you're at...
bundle open BUNDLED_GEM will open the BUNDLED_GEM's source code in your default editor...
Back when Steak was first released, Capybara didn’t have any of the nice RSpec helpers it does now. A lot has changed since. Besides the helpers, it got its...
...own RSpec acceptance testing DSL recently, essentially eating Steak’s functionality and turning it into a complete acceptance testing solution (on top of RSpec...
An alternative could be to use the MySQL Docker image which is still updated for 5.6. Ubuntu 16.04 only provides packages for MySQL 5.7 which has a range...
...list of official APT repositories for MySQL 5.6, but those repositories do not yet support Ubuntu 16.04. However, the 15.10 repos will work for 16.04. I would not recommend to...
We recommend configuring Selenium's unhandled prompt behavior to { default: 'ignore' }. When running tests in a real browser, we use Selenium. Each browser is controlled by a specific...
...driver, e.g. Selenium::WebDriver::Chrome for Chrome. There is one quirk to all drivers (at least those following the W3C webdriver spec) that can be impractical: When any user prompt...
When you do something like this in your code: def var_value @var ||= some_expensive_calculation end Be aware that it will run some_expensive_calculation every time you call...
This illustrates the problem: def some_expensive_calculation puts "i am off shopping bits!" @some_expensive_calculations_result end When you set @some_expensive_calculations_result to nil...
When your Solr seems to be started properly (a process is running with the correct data directory) but never responds properly and replies (via the API or web interface) with...
... check if Solr's log directory is actually writable for the user running it...
Dealing with exceptions in a Rails application is (surprisingly) complex. There are multiple configurations and methods that influence how exceptions are actually handled. This card explains some of the interactions...
...is raised in your app you want the following things to be true: Your server should not crash (your Ruby process should continue to run) Your user should receive an...
...chat messages, and it will load them into its context for analysis. Note For scanned pages that may be sideways or upside down, auto-rotate them first. Autocrop assumes upright...
...px so text remains readable. To convert PDF pages to scaled down images: pdftoppm -png -scale-to 1500 input.pdf output_prefix Convert images to thumbnails: vipsthumbnail input.png --size 1500x1500 -o...
...example, the configuration for SASS files looks like this: { test: /\.(scss|sass)$/i, use: [ { loader: 'style-loader', options: {...
{ loader: 'css-loader', options: {...
{ loader: 'postcss-loader', options: {...
{ loader: 'sass-loader', options...
...loaders (which are usually npm modules) are run on it in reverse order. First, the sass-loader converts SASS to regular CSS. Then, the postcss-loader uses PostCSS to postprocess...
...method for controllers. The most common way is to pass an ActiveRecord instance or scope, and fresh_when will set fitting E-Tag and Last-Modified headers for you. For...
...scopes, an extra query is sent to the database. fresh_when @users If you do not want that magic to happen, e.g. because your scope is expensive to resolve, you...
...be confused with truemail.io) allows validating email addresses, e.g. when users enter them into a sign-up form. It runs inside your application and does not depend on an external...
...set config.not_rfc_mx_lookup_flow = true. Validation methods explained Regex validation (1) is pretty straight-forward and basically "free" since you're not making and network connections. SMTP validation...
...looking for a functionality in RubyMine but don't know or remember its keyboard shortcut or which menu it is located in?\ Hit Ctrl+Shift+A. This will bring up...
...the result from the list to run it. The list of results will also show you any assigned keyboard shortcuts...
yield(Nokogiri::XML(node.outer_xml).root) end end end end This will simply yield regular Nokogiri nodes...
MySQL will use the index when your query is well-formed: mysql> EXPLAIN SELECT * FROM users WHERE email = 'foo@example.com'; +----+-------------+-------+-------+----------------------+----------------------+---------+-------+------+-------+ | id | select_type | table | type | possible_keys | key | key_len...
...ref | rows | Extra | +----+-------------+-------+-------+----------------------+----------------------+---------+-------+------+-------+ | 1 | SIMPLE | users | const | index_users_on_email | index_users_on_email | 768 | const | 1 | | +----+-------------+-------+-------+----------------------+----------------------+---------+-------+------+-------+ However, indexes are not used if you are passing incorrect data types...