When you are using the #selector_for helper in Cucumber steps, as e.g. Spreewald does, the following snippet will save you typing. It recognizes a prose BEM-style selector and maps it to the corresponding BEM class.

For a variation on this idea, see An auto-mapper for ARIA labels and BEM classes in Cucumber selectors.

Examples

"the main menu" -> '.main-menu'
"the item box's header" -> '.item-box--header'

Here are some examples of steps (using Spreewald, too):

T...

Enumerable#count can do three things.

• With no argument provided, it returns the number of items.
• With an argument, it returns the number of items matching the given value.
• With a block, it counts the number of elements yielding a truthy value.

ary = [1, 2, 4, 2]
ary.count #=> 4
ary.count(2) #=> 2
ary.count { |x| x % 2 == 0 } #=> 3

Array#flatten by default flattens an array recursively. To only flatten the array for e.g. one level, it takes an optional argument.

# Flattens the array recursively
>> [1, [2, [3]]].flatten
=> [1, 2, 3]

# Flattens the array the given number of times
>> [1, [2, [3]]].flatten(1)
=> [1, 2, [3]]

I got the following error after updating the selenium-webdriver gem:

wrong number of arguments (0 for 1) (ArgumentError)
/home/pointoo-dev/.rvm/gems/ruby-1.8.7-p374/gems/selenium-webdriver-2.35.1/lib/selenium/webdriver/common/platform.rb:183:in `open'
/home/pointoo-dev/.rvm/gems/ruby-1.8.7-p374/gems/selenium-webdriver-2.35.1/lib/selenium/webdriver/common/platform.rb:183:in `ip'
/home/pointoo-dev/.rvm/gems/ruby-1.8.7-p374/gems/selenium-webdriver-2.35.1/lib/selenium/webdriver/common/platform.rb:196:in `interfaces'

It was caused...

It's like a GUI for the famous git add [-p].

Select files with the up/down-keys and hit

• u for staging/unstaging the whole file
• Enter for showing the diff of a file
  • j and k to navigate in the diff
  • u again to stage/unstage chunks
  • 1 to stage/unstage only lines
  • \ to split large chunks
• F5 to refresh the view

The easiest way to detect touch-capable browsers is to check for the presence of touch events. It is no 100% solution, but has by far the best cost-benefit ratio. (Know that this does not detect touch devices, but browsers.)

Javascript

var isTouchDevice = 'ontouchstart' in window

Coffeescript

isTouchDevice = 'ontouchstart' of window

On the difference between the Javascript and the Coffeescript version, see [Beware: Coffeescript "in" is not the Javascript "in"](https://makandracards.com/makandra/31073-beware-c...

TL;DR Block formatting contexts establish an isolating container. float
and clear only apply to elements within such a container.

About

Block formatting contexts (BFCs) are important for the positioning and clearing
of floats. The rules for positioning and clearing of floats apply only to
things within the same block formatting context.

Floats do not affect the layout of things in other block formatting contexts,
and clear only clears past floats in the same block formatting context.

How to create a new block form...

• Right-click on the table
• Select Table...
• Select Text flow
• Uncheck Allow row to break across pages and columns

$ rspec -b.

To find a hash key by it's value, i.e. reverse lookup, one can use Hash#key. It's available in Ruby 1.9+.

Hash#key(value) → key
# => Returns the key of the first occurrence of a given value.
     If the value is not found, returns nil.

hash = { "a" => 100, "b" => 200, "c" => 300, "d" => 300 }
hash.key(200)   #=> "b"
hash.key(300)   #=> "c"
hash.key(999)   #=> nil

tldr; Use git diff -M or git diff --find-renames when you've moved a few files around.

Usage

$ git diff --help
  Options:
    -M[<n>], --find-renames[=<n>]
      Detect renames. If n is specified, it is a threshold on the similarity index
       (i.e. amount of addition/deletions compared to the file’s size). For example,
       -M90% means Git should consider a delete/add pair to be a rename if more than
       90% of the file hasn’t changed. Without a % sign, the number is to be read as
       a fraction, with a decimal point...

If your angular app is not served on /, but on a different url (say /admin), links generated with ui-router will not work when you open them in a new tab.

Fix this by adding this tag in your <head>:

<base href='/admin#/'>

Helper method:

def base_tag
  tag(:base, href: request.path_info + "#/")
end

greckout query

This will list all branches matching your query as input options for git checkout

  greckout ar
  
  1) ar/cache-api-keys-1098
  2) ar/add-categories-object-to-tv-show-1382
  3) ...

If you want to load an SQL dump from an ActiveRecord migration, you might find this to be harder than you thought. While you can call ActiveRecord::Base.connection.execute(sql) to execute arbitrary SQL commands, the MySQL connection is configured to only accept a single statement per query. If you try to feed it multiple statements, it will die with You have an error in your SQL syntax.

You can work around this by opening a second MySQL connection that does accept multiple statements per call.

Below is an example for a migration that l...

If you're getting this strange error message when setting debugging breakpoints, probably HAML is the culprit.

Cause

As far as I could find out, the error is the result of setting a breakpoint (debugger) in a helper method that's called from a haml partial.

Suggestions

Try putting the breakpoint into the HAML view.

I've pushed an update to Cucumber factory that simplifies working with FactoryGirl factories.

Say you define a factory with the class: option:

factory :admin, class: User
  email
  admin true
end

In the past, you had to write

Given there is a user (admin)

Now you can simply write

Given there is an admin

The class is inferred from the factory.