Qiang Huang nickyfoto

Revert the full commit

Sometimes you may want to undo a whole commit with all changes. Instead of going through all the changes manually, you can simply tell git to revert a commit, which does not even have to be the last one. Reverting a commit means to create a new commit that undoes all changes that were made in the bad commit. Just like above, the bad commit remains there, but it no longer affects the the current master and any future commits on top of it.

git revert {commit_id}

About History Rewriting

Delete the last commit

Deleting the last commit is the easiest case. Let's say we have a remote origin with branch master that currently points to commit dd61ab32. We want to remove the top commit. Translated to git terminology, we want to force the master branch of the origin remote repository to the parent of dd61ab32:

How to setup PostgreSQL & Rails on Cloud9

At time of writing, Cloud9 has PostgreSQL pre-installed, so you won't need to install it yourself. However, its not running by default, so you will need to start it with this command in the terminal:

sudo service postgresql start

Change the PostgreSQL password to 'password' (or choose a different password):

Warning This is SEVERELY outdated, the current jupyter version is > 6.X, please refer to your current jupyter notebook installation!

Disclaimer : I just copied those shortcuts from Jupyter Menú > Help > Keyboard Shortcuts, I didn't wrote them myself.

Check your current shortcuts in your Help, shortcuts coule have been modified by extensions or your past self.

	# -- coding: utf-8 --
	""" rwlock.py

	A class to implement read-write locks on top of the standard threading
	library.

	This is implemented with two mutexes (threading.Lock instances) as per this
	wikipedia pseudocode:

	https://en.wikipedia.org/wiki/Readers%E2%80%93writer_lock#Using_two_mutexes

	"""
	In jupyter notebook simple logging to console
	"""
	import logging
	import sys

	logging.basicConfig(stream=sys.stdout, level=logging.INFO)

	# Test
	logger = logging.getLogger('LOGGER_NAME')

	# 你可以从该 URL 下载这个配置文件: http://surge.run/config-example/ios.conf
	# 用编辑器编辑后，再通过 iTunes, URL, AirDrop 或者 iCloud Drive 复制回 iOS 设备
	# Version 2.0

	[General]
	# 日志等级: warning, notify, info, verbose (默认值: notify)
	loglevel = notify
	# 跳过某个域名或者 IP 段，这些目标主机将不会由 Surge Proxy 处理。(在 macOS
	# 版本中，如果启用了 Set as System Proxy, 那么这些值会被写入到系统网络代理
	# 设置中.)

Qiang Huang nickyfoto

Revert the full commit

About History Rewriting

Delete the last commit

How to setup PostgreSQL & Rails on Cloud9

Toc

Keyboard shortcuts

	export FORMAT="ID\t{{.ID}}\nNAME\t{{.Names}}\nIMAGE\t{{.Image}}\nPORTS\t{{.Ports}}\nCOMMAND\t{{.Command}}\nCREATED\t{{.CreatedAt}}\nSTATUS\t{{.Status}}\n"

	// usage:
	docker ps --format="$FORMAT"