See how a minor change to your commit message style can make you a better programmer.
Format: <type>(<scope>): <subject>
<scope>
is optional
# Updated for Ruby 2.3 | |
string_t = None | |
def get_rstring(addr): | |
s = addr.cast(string_t.pointer()) | |
if s['basic']['flags'] & (1 << 13): | |
return s['as']['heap']['ptr'].string() | |
else: | |
return s['as']['ary'].string() |
http://stackoverflow.com/questions/22667401/postgres-json-data-type-rails-query | |
http://stackoverflow.com/questions/40702813/query-on-postgres-json-array-field-in-rails | |
#payload: [{"kind"=>"person"}] | |
Segment.where("payload @> ?", [{kind: "person"}].to_json) | |
#data: {"interest"=>["music", "movies", "programming"]} | |
Segment.where("data @> ?", {"interest": ["music", "movies", "programming"]}.to_json) | |
Segment.where("data #>> '{interest, 1}' = 'movies' ") | |
Segment.where("jsonb_array_length(data->'interest') > 1") |
#How I built an audio book reader for my nearly blind grandfather
Last year, when visiting my family back home in Holland, I also stopped by my grand-parents. My grand-father, now 93 years old, had always been a very active man. However, during the presceding couple of months, he'd gone almost completely blind and now spent his days sitting in a chair. Trying to think of something for him to do, I suggested he try out audio books. After finally convincing him -- he said audio books were for sad old people -- that listening to a well performed recording is actually a wonderful experience, I realized the problem of this idea.
####The problem with audio devices and the newly blind. After my first impulse to jump up and go buy him an
Disclaimer: This piece is written anonymously. The names of a few particular companies are mentioned, but as common examples only.
This is a short write-up on things that I wish I'd known and considered before joining a private company (aka startup, aka unicorn in some cases). I'm not trying to make the case that you should never join a private company, but the power imbalance between founder and employee is extreme, and that potential candidates would
# Install QEMU OSX port with ARM support | |
sudo port install qemu +target_arm | |
export QEMU=$(which qemu-system-arm) | |
# Dowload kernel and export location | |
curl -OL \ | |
https://github.com/dhruvvyas90/qemu-rpi-kernel/blob/master/kernel-qemu-4.1.7-jessie | |
export RPI_KERNEL=./kernel-qemu-4.1.7-jessie | |
# Download filesystem and export location |
These instructions will guide you through the process of setting up local, trusted websites on your own computer.
These instructions are intended to be used on macOS Sierra, but they have been known to work in El Capitan, Yosemite, Mavericks, and Mountain Lion.
NOTE: You may substitute the edit
command for nano
, vim
, or whatever the editor of your choice is. Personally, I forward the edit
command to Sublime Text:
alias edit="/Applications/Sublime\ Text.app/Contents/SharedSupport/bin/subl"
🥇 Instead of sending Ether, use the withdrawal pattern
🥈 If you really need to send Ether, use a safe wrapper like OpenZeppelin's Address.sendValue(addr, amount)
🥉 If you really need to send Ether without dependencies, use (bool success, ) = addr.call{value: amount}("")