markhuyong markhuyong

This is unmaintained, please visit Ben-PH/spacemacs-cheatsheet

Useful Spacemacs commands

SPC q q - quit
SPC w / - split window vertically
SPC w - - split window horizontally
SPC 1 - switch to window 1
SPC 2 - switch to window 2
SPC w c - delete current window

Inspired by dannyfritz/commit-message-emoji

Tired of entering passwords again and again ?

Run this command to remember your password:

git config --global credential.helper 'cache --timeout 28800'

Above command will tell git to cache your password for 8 hours.

Install MySQL on OS X El Capitan

Normally the installation of MySQL can be achieved with a single command, which executes a script provided by MacMiniVault : bash <(curl -Ls http://git.io/eUx7rg)

However, at the time of writing the script is not compatible with OS X El Capitan (10.11)

Install MySQL using Homebrew

An alternative to the aforementioned installation script is installing MySQL using Homebrew. This gist assumes you already have Homebrew installed, if not first read the article "Homebrew and El Capitan"

Make sure Homebrew has the latest formulae, so run brew update first

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics

elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent

Hello, visitors! If you want an updated version of this styleguide in repo form with tons of real-life examples… check out Trellisheets! https://github.com/trello/trellisheets

Trello CSS Guide

“I perfectly understand our CSS. I never have any issues with cascading rules. I never have to use !important or inline styles. Even though somebody else wrote this bit of CSS, I know exactly how it works and how to extend it. Fixes are easy! I have a hard time breaking our CSS. I know exactly where to put new CSS. We use all of our CSS and it’s pretty small overall. When I delete a template, I know the exact corresponding CSS file and I can delete it all at once. Nothing gets left behind.”

You often hear updog saying stuff like this. Who’s updog? Not much, who is up with you?

Commit type	Emoji
Initial commit	🎉 `:tada:`
Version tag	🔖 `:bookmark:`
New feature	✨ `:sparkles:`
Bugfix	🐛 `:bug:`

	#!/bin/bash

	VG_NAME="vg0"
	SNAPSHOT_SIZE="+2G"
	BACKUP_LOCATION="/backups"
	DAYSTOKEEP=7

	for lv in $(lvs --noheadings --nosuffix --aligned --separator , -o lv_name,lv_attr \| grep -v ,s \| cut -d, -f1)
	do
	LV_SIZE="$(lvs --units m --noheadings --nosuffix --aligned --separator , -o lv_name,lv_size \| grep "$lv" \| cut -d',' -f2 \| cut -d. -f 1)" # LV size in MB

	_hashCode java/lang/Object.hashCode()I
	_getClass java/lang/Object.getClass()Ljava/lang/Class;
	_clone java/lang/Object.clone()Ljava/lang/Object;
	_dabs java/lang/Math.abs(D)D
	_dsin java/lang/Math.sin(D)D
	_dcos java/lang/Math.cos(D)D
	_dtan java/lang/Math.tan(D)D
	_datan2 java/lang/Math.atan2(DD)D
	_dsqrt java/lang/Math.sqrt(D)D
	_dlog java/lang/Math.log(D)D

	* {
	font-size: 12pt;
	font-family: monospace;
	font-weight: normal;
	font-style: normal;
	text-decoration: none;
	color: black;
	cursor: default;
	}

	#! /usr/bin/env python3

	import asyncio
	import contextlib


	async def ping(ip):
	p = await asyncio.create_subprocess_exec('ping', '-c', '4', ip, stdout=asyncio.subprocess.PIPE)
	async for line in p.stdout:
	print(line)