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@xmeng1
xmeng1 / TypeClassDemo.scala
Created Jun 18, 2019
Cats Type Class Demo
View TypeClassDemo.scala
// Define a very simple JSON AST
sealed trait Json
final case class JsObject(get: Map[String, Json]) extends Json
final case class JsString(get: String) extends Json
final case class JsNumber(get: Double) extends Json
case object JsNull extends Json
////////////////// Step 1
// The "serialize to JSON" behaviour is encoded in this trait
trait JsonWriter[A] {
@kenjipm
kenjipm / workers.sql
Last active Nov 23, 2021
The following data definition defines an organization's employee hierarchy. An employee is a manager if any other employee has their managerId set to the first employees id. An employee who is a manager may or may not also have a manager. TABLE employees id INTEGER NOT NULL PRIMARY KEY managerId INTEGER REFERENCES employees(id) name VARCHAR(30) …
View workers.sql
SELECT name FROM employees
WHERE id NOT IN (SELECT managerId FROM employees WHERE managerId IS NOT NULL);
@xmeng1
xmeng1 / gitkraken-install.sh
Last active Jun 21, 2018 — forked from seangtkelley/gitkraken-install.sh
Install Script for Gitkraken on Fedora 27 + Launcher Icon
View gitkraken-install.sh
#!/bin/bash
# Enter /opt folder (common folder for user installed programs)
# This script assumes you have proper permissions on /opt
cd /home/mengxin/Applications
# Download GitKraken
wget https://release.gitkraken.com/linux/gitkraken-amd64.tar.gz
# Extract the Kraken into /opt directory
View gnome-tracker-disable.md

Disabling GNOME Tracker and Other Info

GNOME's tracker is a CPU and privacy hog. There's a pretty good case as to why it's neither useful nor necessary here: http://lduros.net/posts/tracker-sucks-thanks-tracker/

After discovering it chowing 2 cores, I decided to go about disabling it.

Directories

@aelkz
aelkz / [FEDORA] gitkraken
Last active Oct 26, 2019
How to install gitkraken on Fedora [25,26,27] + launcher icon
View [FEDORA] gitkraken
#!/bin/bash
# Download GitKraken
wget https://release.gitkraken.com/linux/gitkraken-amd64.tar.gz
# copy the downloaded file into /opt directory
cp gitkraken-amd64.tar.gz /opt/
cd /opt
@welshstew
welshstew / sublime-install.sh
Created Dec 9, 2016
sublime text 3 install
View sublime-install.sh
#!/bin/sh
SHORTCUT="[Desktop Entry]
Name=Sublime Text 3
Comment=Edit text files
Exec=/usr/local/sublime-text-3/sublime_text
Icon=/usr/local/sublime-text-3/Icon/128x128/sublime_text.png
Terminal=false
Type=Application
Encoding=UTF-8
Categories=Utility;TextEditor;"
@0xjac
0xjac / private_fork.md
Last active Jan 16, 2022
Create a private fork of a public repository
View private_fork.md

The repository for the assignment is public and Github does not allow the creation of private forks for public repositories.

The correct way of creating a private frok by duplicating the repo is documented here.

For this assignment the commands are:

  1. Create a bare clone of the repository. (This is temporary and will be removed so just do it wherever.)
    git clone --bare git@github.com:usi-systems/easytrace.git
@onjin
onjin / docker-compose.yml
Created Sep 5, 2016
example docker compose for postgresql with db init script
View docker-compose.yml
postgres:
image: postgres:9.4
volumes:
- ./init.sql:/docker-entrypoint-initdb.d/init.sql
@daredude
daredude / docker-clear.bat
Created Jun 5, 2016
delete all docker container and images on windows
View docker-clear.bat
@echo off
FOR /f "tokens=*" %%i IN ('docker ps -aq') DO docker rm %%i
FOR /f "tokens=*" %%i IN ('docker images --format "{{.ID}}"') DO docker rmi %%i
View secret_garden.py
import skimage;
from skimage import data
from skimage.filters import threshold_otsu
from skimage.segmentation import clear_border
from skimage.measure import label
from skimage.morphology import closing, square
from skimage.measure import regionprops
from skimage.color import label2rgb
import cv2
import numpy as np