Katapult EOL
Katapult was an endeavor to dramatically speed up starting a new Rails application. However, it turned out to save less time than expected, while requiring more time for maintenance than anticipated. Since its benefits fell too low, we have decided to not continue developing Katapult.
You can still use Katapult for generating ready-to-run applications with model CRUD, authentication and all of Katapult's features, but the rapid development of the web will quickly render the generated code antiquated. Nevertheless, its architecture may remai…
faviconit.com: Most comfortable and free favicon generator
Eduardo Russo was tired of complex favicon creation and created his own favicon generator. It's really easy and allows a lot of image editing before rendering the favicons, in all needed sizes, formats and with the HTML needed to include them!
In Rails applications with Haml …
- put all the favicon files into
/public - store the HTML to
app/views/layouts/_favicon.html - add
= render 'layouts/favicon'to<head>in your application layout(s)
… and you'…
LoDash: isBlank and isPresent mixins
When you need to check a value for presence, don't rely on JavaScript since it considers 0 or "0" false. Also don't rely on LoDash's _.isEmpty:
if ('0') { ... } // false
if (0) { ... } // false
if (!_.isEmpty('0')) { ... } // true (= good)
if (!_.isEmpty(0)) { ... } // false (= not good)
This is because isEmpty it is only meant for objects with a length.
While the name implies that it's meant only for collections, you probably still want something like isBlank or `is…
Active Record and PostgreSQL — Ruby on Rails Guides
Rails guide that covers PostgreSQL-specific column types and usages for Active Record.
You should especially keep in mind the special datatypes that PostgreSQL offers. \
Types like json and array take away a lot of the pain that you had on MySQL projects.
Example use cases for array are tags or storing foreign keys (instead of a join model). You can even index them.
Updated: Running Rails 2 apps with modern MariaDB SQL server
Clarified that re-installing mysql and mysql2 gems is required after switching to MariaDB.
Sass: Do not use comments between selector definitions
Sass lets you easily specify multiple selectors at once like this:
.some-block
&.has-hover,
&:hover
outline: 1px solid red
This will add a red outline on either real hover or when the has-hover class is present. However, adding a comment will void the definition of that line:
.some-block
&.has-hover, // From hoverable.js <-- DON'T
&:hover
outline: 1px solid red
… will simply drop the &.has-hover part.
RubyMine's clipboard can hold more than one string
By pressing Ctrl + Shift + V you can select a recently copied string for pasting.
Howto: Write a proper git commit message
Seven Rules
- Separate subject from body with a blank line
- Limit the subject line to 50 characters (max. 72)
- Capitalize the subject line
- Do not end the subject line with a period
- Use the imperative mood in the subject line
- Wrap the body at 72 characters
- Use the body to explain what and why vs. how
5. Use the imperative mood in the subject line (partially extracted)
If applied, this commit will your subject line here
Good:
- If applied, this commit will refactor subsystem X for readability
- If applie…
Git: Show commits that have touched specific text in a file
If you want to find the commits that touched a specific text in a file, use git log -S 'text in the code' -- path/to/file.
Here is an example, where the move of the convert_number_column_value(value) method in active record is traced (simplified output):
git log -n 1 --pretty=oneline -S 'convert_number_column_value(value)' -- activerecord/lib/active_record/base.rb
ceb33f84933639d3b61aac62e5e71fd087ab65ed Split out most of the AR::Base code into separate modules :cake:
```
git show ceb33f84933639d3b61aac62e5e71fd087ab65ed…
Finding a method name on a Ruby object
Wondering how a specific method on an object is exactly named? You can use Enumerable#grep to detect it in the array of methods.
@user.methods.grep /name/ # => [:name, :first_name, :last_name]
You can also call #private_methods or #public_methods. To find only relevant methods, it is suggested to subtract generic methods like this:
User.methods - Object.methods
User.methods - ActiveRecord::Base.methods
@user.methods - Object.instance_methods
@user.methods - ActiveRecord::Base.instance_methods
Using regular expressions in JavaScript
Regular expressions in Javascript are represented by a RegExp object. There also is a regex literal as in many other languages: /regex/. However, they are used slightly differently.
Regex literal
- Usage:
/foo+/ - Shorthand for creating a regular expression object
RegExp() object
- Usage:
Regexp("foo+")ornew RegExp("foo+") - No surrounding slashes required (they're the literal markers)
- Since the argument is a string, backslashes need to be escaped as well:
RegExp("\\d+")
Gotchas
- Regex objects [never eq…