Jorge Arévalo jorgeas80

Introduction:

If we want to serialize objects we must consider two questions:

What to serialize? Which fields of objects, how deep to serialize related objects.
How output should looks like? Which format (xml, json, yaml), fields renaming, some format specific options (like attributes in xml - nothing similar in json), order of fields, some fields in other place in structure tree than others.

This questions lead as to two phases of serialization:

First phase "dehydration": Change class instances (generally Python class, particular Django Model class) to dictionary contains data(python native types) of all interesting us fields. In this stage we are not interested in specific format.

vimdiff cheat sheet

##git mergetool

In the middle file (future merged file), you can navigate between conflicts with ]c and [c.

Choose which version you want to keep with :diffget //2 or :diffget //3 (the //2 and //3 are unique identifiers for the target/master copy and the merge/branch copy file names).

:diffupdate (to remove leftover spacing issues)

:only (once you’re done reviewing all conflicts, this shows only the middle/merged file)

SQL to MongoDB Mapping Chart

SQL to MongoDB Mapping Chart¶

In addition to the charts that follow, you might want to consider the Frequently Asked Questions section for a selection of common questions about MongoDB.

Executables¶

The following table presents the MySQL/Oracle executables and the corresponding MongoDB executables.

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

	/*
	* A function that converts a PostGIS query into a GeoJSON object.
	* Copyright (C) 2012 Samuel Giles <[email protected]>
	*
	* This program is free software: you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation, either version 3 of the License, or
	* (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,

	#!/env/python
	# coding=utf8

	"""
	Converting Degrees, Minutes, Seconds formatted coordinate strings to decimal.

	Formula:
	DEC = (DEG + (MIN * 1/60) + (SEC * 1/60 * 1/60))

	Assumes S/W are negative.

	import requests

	#http://docs.python-requests.org/en/latest/user/quickstart/#post-a-multipart-encoded-file

	url = "http://localhost:5000/"
	fin = open('simple_table.pdf', 'rb')
	files = {'file': fin}
	try:
	r = requests.post(url, files=files)
	print r.text

	"""Testing Django view decorators.

	This code was originally published as part of an article at
	http://tech.novapost.fr/django-testing-view-decorators-en.html

	To run this file:

	.. code-block:: sh

	virtualenv --distribute --no-site-packages testing

	from django.core.serializers import json

	class MyClass(json.DjangoJSONEncoder):
	def default(self, o):
	return o + 5

	json.dumps([1, 2, 3], cls=MyClass)

	Copyright the authors of Honcho and/or Ben Lopatin

	Licensed for reuse, modification, and distribution under the terms of the MIT license