esoergel

#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
Usage:
    $ find . | grep py$ | python line_counts.py
"""
from __future__ import unicode_literals
import subprocess
import numpy

esoergel

Beyond 'wrappers' - Using querysets to compartmentalize business logic into the Django ORM

The Django ORM is an invaluable tool for querying your data. However, as a generic tool, it's often not a clean fit. Querying logic ends up being duplicated in multiple places, often with subtle variations. Maybe you have helper functions for commonly used queries, but these can't be combined.

This article describes a technique for extending Django querysets with methods specific to your models. This lets you write business logic in a way that fits in to the Django ORM, like MyModel.objects.filter(...).my_custom_method().first()

Some benefits of encapsulating database queries are:

• Reusability: This method can be reused elsewhere, preventing the need for duplication.
• Unification: This query presumably represents something meaningful. By creating and using an abstraction, you avoid multiple implementations of the same concept, which may have subtle differences.

esoergel

import copy
import datetime

# The length of each segment, in order.
# Note that blocks at an intersection count as part of both segments
puzzle = [
    3, 4, 4, 4, 2, 4, 2, 4, 2, 2, 2, 2, 2,
    2, 2, 2, 2, 3, 2, 4, 3, 3, 2, 4, 2, 3,
    2, 2, 2, 2, 2, 3, 2, 2, 2, 2, 4, 2, 4,
]

esoergel

You ever factor something out of a method and realize you can get rid of the dependency on self (which is really nice to do for clarity and testability)?

In my experience, typically this is then pulled in to a function, but then you have to move the definition all the way outside of the class, which can suck.

To compensate for this, sometimes you'll leave it as a method and just not use self in the body. This is a good use case for the @staticmethod decorator, which I'll explain:

esoergel

// ==UserScript==
// @name        Ignore whitespace button
// @namespace   github-ignore-whitespace
// @description Adds a button to github diff views to toggle the "ignore whitespace" option.
// @include     https://github.com/*
// @version     1
// @grant       none
// ==/UserScript==
function main() {
  $("#toc > .btn-group").prepend('<a class="btn btn-sm" href="?w=1">Ignore whitespace</a>');

esoergel

<?xml version="1.0" encoding="UTF-8" ?>
<h:html xmlns:h="http://www.w3.org/1999/xhtml" xmlns:orx="http://openrosa.org/jr/xforms" xmlns="http://www.w3.org/2002/xforms" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:jr="http://openrosa.org/javarosa" xmlns:vellum="http://commcarehq.org/xforms/vellum">
    <h:head>
        <h:title>New Commande UX</h:title>
        <model>
            <instance>
                <data xmlns:jrm="http://dev.commcarehq.org/jr/xforms" xmlns="http://openrosa.org/formdesigner/3c2e45b4c8d9ce9df41dfed50a1031255f5ce8b8" uiVersion="1" version="1" name="New Commande UX">
                    <products ids="" count="" current_index="" vellum:role="Repeat">
                        <item id="" index="" jr:template="">
                            <is_required />

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        {
            _index: report_xforms_20150406_1136
            _type: report_xform
            _id: a54c548fa13642d3bb1127ccab053452
            _score: 1
            _source: {
                location_: [ ]
                domain: pact
                xmlns: http://dev.commcarehq.org/pact/patientupdate
                __retrieved_case_ids: [

esoergel

function hammer() {                                                                                  
    git checkout master                                                                              
    git pull origin master                                                                           
    git submodule update --init --recursive                                                          
    pip install -r requirements/requirements.txt -r requirements/dev-requirements.txt -r                     ⤷ requirements/prod-requirements.txt                                                             
    find . -name '*.pyc' -delete                                                                     
    ./manage.py syncdb --migrate                                                  
}  

esoergel

class A1(object):
    def __init__(self):
        print "Class A1"
        super(A1, self).__init__()

class A2(A1):
    def __init__(self):
        print "Class A2"
        super(A2, self).__init__()

esoergel

// ==UserScript==
// @name        Ignore whitespace button
// @namespace   github-ignore-whitespace
// @description Adds a button to github diff views to toggle the "ignore whitespace" option.
// @include     https://github.com/*
// @version     1
// @grant       none
// ==/UserScript==
function main() {
  $("#toc > .button-group").prepend('<a class="minibutton" href="?w=1">Ignore whitespace</a>');