How to choose keyboard shortcuts for web applications
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How to: Upgrade CarrierWave to 3.x
While upgrading CarrierWave from version 0.11.x to 3.x, we encountered some very nasty fails. Below are the basic changes you need to perform and some behavior you may eventually run into when upgrading your application. This aims to save you some...
How to make Webpacker compile once for parallel tests, and only if necessary
Webpack is the future. We're using it in our latest Rails applications.
For tests, we want to compile assets like for production.
For parallel tests, we want to avoid 8 workers compiling the same files at the same time.
When assets did not change...
How to build the perfect number of blank records for a nested form
When you render a nested form for a Movie
which has_many :actors
, you want to render the right number of blank Actor
forms. The right number means:
- A minimum number of blank forms so the user can add more
Actors
to an existingMovie
, ...
How to not die with ActionView::MissingTemplate when clients request weird formats
When HTTP clients make an request they can define which response formats they can process. They do it by adding a header to the HTTP request like this:
Accept: application/json
This means the client will only understand JSON respon...
How to run a small web server (one-liner)
Sometimes you just want to have a small web server that serves files to test something.
Serve the current directory
On Ruby 1.9.2+ you can do the following (".
" for current directory).
ruby -run -ehttpd . -p8000
Python 2.x offers a s...
Customize tokenization of the MySQL FULLTEXT parser
The way MySQL's FULLTEXT tokenizer splits text into word tokens might not always be what you need. E.g. it splits a word at period characters.
Since the tokenizer has near-zero configuration options (minimum word length and stopwords list), you n...
Smarticus » Introduction to Acceptance Testing Ruby Web Applications
In this presentation, I demoed Cucumber and Webrat. I also talked about Integrity and how I like to put it all together.
How to force horizontal panel layout for Chrome
Chrome's developer tools automagically choose vertical or horizontal panel layout, based on their width. You can disable that magic.
In the developer tools, klick the cogwheel icon (or press F1
when focusing the dev tools) to open the settings ...
Invoices: How to properly round and calculate totals
While it might seem trivial to implement an invoice that sums up items and shows net, gross and vat totals, it actually involves a lot of rules and caveats. It is very easy to create invoices where numbers don't add up and a few cents are missing....
How to make Rational#to_s return strings without denominator 1 again
The way Rational#to_s
works on Ruby has changed from Ruby 1.9 on. Here is how to get the old behavior back.
You may want this for things where Rationals are being used, like when subtracting Date
objects from one another.