ruediger

*.tex   diff=tex
*.bib   diff=bibtex
*.c     diff=cpp
*.h     diff=cpp
*.c++   diff=cpp
*.h++   diff=cpp
*.cpp   diff=cpp
*.hpp   diff=cpp
*.cc    diff=cpp
*.hh    diff=cpp

scaryguy

-- Firstly, remove PRIMARY KEY attribute of former PRIMARY KEY
ALTER TABLE <table_name> DROP CONSTRAINT <table_name>_pkey;

-- Then change column name of  your PRIMARY KEY and PRIMARY KEY candidates properly.
ALTER TABLE <table_name> RENAME COLUMN <primary_key_candidate> TO id;

wulab

# backup current staging
$ git checkout staging
$ git branch tmp

# reset to master and merge hotfix
$ git reset --hard master
$ git merge hotfix/xxx
$ git push --force origin staging

# deploy to production

oakes

Contents

• Why care about Rust?
• The Toolchain
• Creating a New Project
• Modules
• Crates
• Types
• References
• Mutability

deanrad

has_many is a SOLID violation

TL;DR has_many is an anti-pattern which leads straight to monolithic applications.

First - what defines a monolithic application? It is one that cannot be split apart because everything depends on everything else. No part can be extracted to an external library - the library would have to be the size of our entire app. Let this be our working definition of a monolith. Ignore, for the moment, whether it's deployed on more than one machine, but ask could it be separated if you desired.

One major culprit of not being able to split an application up is a dependency cycle.

palkan

Setup

Replace IRB with Pry (in your Gemfile) and Byebug with pry-byebug.

gem 'pry-rails', group: [:development, :test]
gem 'pry-byebug', group: [:development, :test]

Using PRY

alexedwards

.
├── books
│   ├── handlers.go
│   └── models.go
├── config
│   └── db.go
└── main.go

bastman

Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

zg

TL;DR

• Create 10GB FreeBSD image using QEMU.
• Run the VM using xhyve.
• Mount host directory.
• Resize the image.

Requisites

• OSX
• Homebrew

palkan

# if you want to render flamegraphs
gem "stackprof", require: false # required by flamegraph
gem "flamegraph", require: false