vasanthk

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

paulirish

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

kurtbrose

'''
Converts functions into simple commands.
Turns function arguments into command line arguments, and docstrings into helpstrings.
Essentially an argparse shortcutter.

e.g.

@f2cmd.cmd(arg1={"type": int})
def my_main_function(arg1, arg2):
    pass

zatarra

#!/usr/bin/python
import serial
import sys

latestByte  = ('c')
lastByte    = ('c')
inPacket    = False
myPacket    = []
PLENGTH     = 0

debasishg

General Background and Overview

1. Probabilistic Data Structures for Web Analytics and Data Mining : A great overview of the space of probabilistic data structures and how they are used in approximation algorithm implementation.
2. Models and Issues in Data Stream Systems
3. Philippe Flajolet’s contribution to streaming algorithms : A presentation by Jérémie Lumbroso that visits some of the hostorical perspectives and how it all began with Flajolet
4. Approximate Frequency Counts over Data Streams by Gurmeet Singh Manku & Rajeev Motwani : One of the early papers on the subject.
5. [Methods for Finding Frequent Items in Data Streams](http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.187.9800&rep=rep1&t

mbostock

license: gpl-3.0
height: 960
redirect: https://observablehq.com/@d3/d3-zoomable-circle-packing

audreyfeldroy

• Update HISTORY.md
• Commit the changes:

git add HISTORY.md
git commit -m "Changelog for upcoming release 0.1.1."

• Update version number (can also be minor or major)

bumpversion patch

slaporte

# -*- coding: utf-8 -*-

IRREGULAR_PLURALS = {'alumnus': 'alumni',
                    'cactus': 'cacti',
                    'focus': 'foci',
                    'fungus': 'fungi',
                    'nucleus': 'nuclei',
                    'radius': 'radii',
                    'stimulus': 'stimuli',
                    'axis': 'axes',

reclosedev

# -*- coding: utf-8 -*-
import ast

from parsimonious.grammar import Grammar
from parsimonious.nodes import NodeVisitor


json_syntax = r'''
    json_file = ws? json ws?
    json = object / array

SeanHayes

# -*- coding: utf-8 -*-
#Copyright (C) 2013 Seán Hayes

import my_project.settings as dj_settings
from fabric.api import local, run, sudo, env, prompt, settings, cd, parallel, execute
from fabric.contrib.files import exists
from fabric.decorators import hosts, roles, runs_once
import json
import logging
import os