function reflexive(x) {
return x != x;
}
reflexive(NaN)
function transitive(x,y,z) {
return x && x == y && y == z && x != z;
View gist:4268258
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function j(u, c) { | |
var h = document.getElementsByTagName('head')[0], s = document.createElement('script'); | |
s.async = true; s.src = u; | |
s.onload = s.onreadystatechange = function () { | |
if (!s.readyState || /loaded|complete/.test(s.readyState)) { | |
s.onload = s.onreadystatechange = null; if (h && s.parentNode) { h.removeChild(s) } s = undefined; | |
if (c) { c() } | |
} | |
}; | |
h.insertBefore(s, h.firstChild); |
View desafio.md
View osx-setup.sh
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#!/bin/bash | |
# A script to set up a new mac. Uses bash, homebrew, etc. | |
# Focused for ruby/rails development. Includes many utilities and apps: | |
# - homebrew, rvm, node | |
# - quicklook plugins, terminal fonts | |
# - browsers: chrome, firefox | |
# - dev: iterm2, sublime text, postgres, chrome devtools, etc. | |
# - team: slack, dropbox, google drive, skype, etc |
View mongo-statefulset.yaml
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## Generate a key | |
# openssl rand -base64 741 > mongodb-keyfile | |
## Create k8s secrets | |
# kubectl create secret generic mongo-key --from-file=mongodb-keyfile | |
--- | |
apiVersion: v1 | |
kind: Service | |
metadata: | |
name: mongo | |
labels: |
View paint.py
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from tkinter import * | |
from tkinter.colorchooser import askcolor | |
class Paint(object): | |
DEFAULT_PEN_SIZE = 5.0 | |
DEFAULT_COLOR = 'black' | |
def __init__(self): |
View ssl-localhost-webpack.md
HTTPS using localhost
To generate a local certiticate and using it, please follow these steps (note: replace MY_DOMAIN
, MY_FILENAME
and MY_PASSPHRASE
based on your choice):
Step 1: Generate private key
openssl genrsa -out MY_FILENAME.key 4096
View install-arch-linux-on-btrfs-subvolume-inside-luks
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# Install Arch Linux with full encrypted btrfs subvolume inside luks | |
# Hardware: BIOS system, Intel GPU, Nvidia Optimus, Toshiba SSD, Wifi | |
# Please adjust for your needs. | |
# filename: install-arch-linux-on-btrfs-subvolume-inside-luks.txt | |
# The official guide: https://wiki.archlinux.org/index.php/Installation_Guide | |
# Download the archiso image from https://www.archlinux.org/download/ | |
# Copy to a usb-drive | |
dd bs=4M if=archlinux.iso of=/dev/sdx status=progress oflag=sync # on linux |
View Gemfile
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ruby '2.7.1' | |
gem 'rails', github: 'rails/rails' | |
gem 'tzinfo-data', '>= 1.2016.7' # Don't rely on OSX/Linux timezone data | |
# Action Text | |
gem 'actiontext', github: 'basecamp/actiontext', ref: 'okra' | |
gem 'okra', github: 'basecamp/okra' | |
# Drivers |
View latency.markdown
Latency numbers every programmer should know
L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns
Compress 1K bytes with Zippy ............. 3,000 ns = 3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns = 20 µs
SSD random read ........................ 150,000 ns = 150 µs
Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs
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