Felix von Leitner on the only approach to manageable systems // plasmasturm.org
Professionals can be recognised by the fact that they minimize complexity. Small modules, complete isolation of modules, minimal (in number and size) interfaces. Bunglers can be recognised by the fact that they launch Visio when they plan their project.
Related cards:
Lightning Talk: Coverage based Test Case Prioritization in Ruby on Rails
For my computer science bachelor's thesis I programmed and evaluated a CLI Test Case Prioritization (TCP) tool for makandra. It has been written as a Ruby Gem and was tested and evaluated against one Ruby on Rails project....
Rails: Flagging all cookies as secure-only to pass a security audit
Why secure-only cookies used to be necessary
Cookies have an optional secure
flag. It tells the browser to not send the cookie f...
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...
jQuery: How to attach an event handler only once
With "attaching an event handler once" you possibly mean one of these two things:
Register a function for an event, and discard it once that event has happened
Use one
instead of on
.
$(element).one('eventName', function() { ... });
...
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...
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 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...
Postgres: DISTINCT ON lets you select only one record per ordered attribute(s) for each group
-
To retrieve only unique combinations of the selected attributes: You can omit rows, where all selected columns are equal with the
DISTINCT
statement. - To retrieve the group wise maximum of certain columns: You can keep only one record fo...
Rails: Custom validator for "only one of these" (XOR) presence validation
For Rails models where only one of multiple attributes may be filled out at the same time, there is no built-in validation.
I've seen different solutions in the wild, each with different downsides:
- Private method referenced via
validate
: wor...
Devise: How to allow only HTTP Basic Auth and disable the HTML sign-in form
By default, Devise redirects to a sign-in form when accessing a route that requires authentication. If for some reason you do not want this, but use Basic Authentication (and the corresponding browser username/password dialog) instead, this is a s...