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Fully custom validation error message with Rails
...m-err-msg works with Rails 5, and with the locale setup.
You just need to start the locale message with a caret and it shouldn't display the attribute name in the message.
A model defined as:
class Item < ApplicationRecord
validates :name, presence: true
end
with the following en.yml:
en:...
Rename multiple files by replacing a particular pattern in the filenames using a shell script [dupli
...s/([^-]+)-([^.]+)/$2-$1/g' *. The pattern ^([^-]+)-([^.]+) means: from the start of the name, capture 1 or more chars that are NOT -, then expect a dash, then capture 1 or more chars that are not .. $1 is the first capture, $2 is the second.
– erich2k8
Apr 18 '...
What is the difference between Factory and Strategy patterns?
...oding to abstractions rather than "concretions" then a lot of the patterns start looking like variations on a theme.
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Find first element by predicate
I've just started playing with Java 8 lambdas and I'm trying to implement some of the things that I'm used to in functional languages.
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Dealing with multiple Python versions and PIP?
...up.py install". Personally I find this solution to be not very nice. For a start I didn't even know the pip command wasn't a binary. This isn't a criticism of @bwinton, I'm just surprised there isn't a better way to do this.
– Mike Vella
Apr 18 '12 at 13:17
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The multi-part identifier could not be bound
...r. For example the project I created was CTU SQL Project so I made sure I started my script with USE [CTU SQL Project] as my first line like below.
USE [CTU SQL Project]
SELECT Advisors.First
Load multiple packages at once
...ds for package. Every function in the package that is useful and exported starts with p_. Plus we tend to use library a bit and that's an additional 7 characters. 7 characters x ~1000000 life time uses of the function x .5 seconds per character = 3500000 seconds. That's 58333.33 minutes, 972.222...
Copying files from host to Docker container
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The cleanest way is to mount a host directory on the container when starting the container:
{host} docker run -v /path/to/hostdir:/mnt --name my_container my_image
{host} docker exec -it my_container bash
{container} cp /mnt/sourcefile /path/to/destfile
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INSTALL_FAILED_NO_MATCHING_ABIS when install apk
... folder. I'm sure there's a way to automate installing upon Run but I just start my preferred HAXM emulator and use command line:
adb install (yourapp)-x86-debug.apk
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Unit testing that events are raised in C# (in order)
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If you're doing TDD then event testing can start to generate a lot of repetitive code. I wrote an event monitor that enables a much cleaner approach to unit test writing for these situations.
var publisher = new PropertyChangedEventPublisher();
Action test = () =>...