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jjb /
Created April 25, 2024 04:15
Installing psych gem with macports
sudo port install libyaml yaml-cpp
bundle config build.psych --with-opt-include=/opt/local/include --with-opt-lib=/opt/local/lib
# OR, standalone
gem install psych -- --with-opt-include=/opt/local/include --with-opt-lib=/opt/local/lib
jjb / code.rb
Created April 18, 2024 00:40
Hacking ruby patterns to be first-class objects that can be passed around
# need to "pin" the variable, but this only works with the lambda because
# pattern matching falls back to case matchint (=== on any object in ruby,
# which is NOT "identical object" as in JS)
def matches1(pat,x)
case x
in ^pat
puts true
puts false
jjb / .gitconfig
Created February 6, 2024 16:36
git cleanup
delete-squashed = "!f() { local targetBranch=${1:-master} && git checkout -q $targetBranch && git branch --merged | grep -v \"\\*\" | xargs -n 1 git branch -d && git for-each-ref refs/heads/ \"--format=%(refname:short)\" | while read branch; do mergeBase=$(git merge-base $targetBranch $branch) && [[ $(git cherry $targetBranch $(git commit-tree $(git rev-parse $branch^{tree}) -p $mergeBase -m _)) == \"-\"* ]] && git branch -D $branch; done; }; f"
jjb /
Created January 26, 2024 00:35
trying to get github markdown note highlight things to work in indents


here is some important info

  1. item 1

    [!NOTE] here is some important info

  2. item 2
jjb / code.rb
Created October 4, 2023 16:28
How to set sidekiq options for ActionMailer / ActiveJob / MailDeliveryJob
# in default config, ActionMailer will use sidekiq wrapped in ActiveJob
# This makes it so there is no obvious/direct place to specify configuration
# It's easy to do with the below method, which can be placed in an initializer
Rails.application.config.after_initialize do
ActionMailer::MailDeliveryJob.class_eval do
sidekiq_options retry: 2
jjb / code.rb
Created September 26, 2023 18:09
benchmark ruby rand vs rand(100)
require 'benchmark/ips'
require "benchmark/memory"
Benchmark.ips do |x|"rand") do
end"rand(100)") do
jjb /
Created June 22, 2023 17:48
Shipyard Shell
#!/usr/bin/env sh
# usage
# shipyard-shell 6187 postgres
# shipyard-shell 6187 api
identifier=`shipyard get environments | grep pr$pr | xargs | cut -w -f1` # xargs to remove leading and trailing whitespace
jjb /
Created June 20, 2023 02:15
How to see which rubocop file is being evaluated

If you are in a situation where rubocop is hanging on a file but you don't know which one, afaik there is no way to have rubocop pring each filename as it runs it. None of the formatters do this and there is no verbose mode. Even --debug does not do this.

Here is a hack to (very slowly) invoke rubocop once for each candidate file:

bundle exec rubocop --list-target-files > files.txt
cat files.txt | xargs -L1 -n1 bundle exec rubocop # this works on macos/bsd, use --verbose instead of -t on linux
jjb /
Last active June 13, 2023 17:41
The equivalent of redhat/centos yum whatprovides for debian/ubuntu
apt update
apt install -y apt-file
apt-file update
apt-file find psql
apt-file find bin/psql
apt-file find postgresql.conf
apt-file find --fixed-string convert # equivalent of .*convert.*, way too much
apt-file find --fixed-string /usr/bin/convert # need to know exact path
apt-file find --regexp '.*bin/convert$' # bingo. would also pick up .../sbin/
jjb / file.rb
Created May 13, 2023 01:36
in MacOS, temporarily set the clipboard to something, and then set it back, using ruby
`echo '#{ENV['THE_TEXT']}' | pbcopy`
3.downto(0) do |second|
`osascript -e 'display notification "Reseting clipboard in #{second} seconds" with title "TMP Clipboard"'`
sleep 1
`echo '#{old}' | pbcopy`