kashifrazzaqui

New startups use Python – MonkeyLearn, Roomstorm
Established startups use Python – Hipmunk, Buffer, Mattermark
Unicorns use Python – Instagram, Pinterest, Spotify, Uber
Food startups use Python – Chewse, Yelp
Dev tools use Python – Sentry, Keen IO
Tech titans use Python – Dropbox, PayPal, Google
Creatives use Python – YouTube, edX, Walt Disney Animation Studios
Defense contractors use Python – Northrop Grumman
Corporate giants use Python – Walmart
Media news sites use Python – Pitchfork, BuzzFeed

kashifrazzaqui

* https://www.python.org/
* https://www.python.org/about/gettingstarted/

* Install postgres using this
    $ brew install postgres 
    $ ln -sfv /usr/local/opt/postgresql/*.plist ~/Library/LaunchAgents
    $ launchctl load ~/Library/LaunchAgents/homebrew.mxcl.postgresql.plist

* Install pgAdmin3
    * http://www.postgresql.org/ftp/pgadmin3/release/v1.20.0/osx/

kashifrazzaqui

daemonize yes
pidfile /var/run/redis.pid
port 6379
timeout 300
loglevel verbose
logfile /var/tmp/redis.log
databases 1
rdbcompression yes
dbfilename dump.rdb
dir ./

kashifrazzaqui

import jsonpickle
import domain

"""
Based on the premise that any object can be identified by its class name and
a the value of a unique attribute (primary key) which is here reffered to as the identity
"""

def make_attribute_key(obj,attribute):
    """

kashifrazzaqui

class PrototypeStore(dict):
    def __setattr__(self, name, value):
        self[name] = value

    def __getattr__(self, name):
        return self[name]

class PrototypeMeta(type):
    def __new__(metacls, cls_name, bases, attrs):
        cls = type.__new__(metacls, cls_name, bases, attrs)

kashifrazzaqui

OK, I didn’t tell you the most important part—how do you know whether to hire someone?

In principle, it’s simple. You’re looking for people who are

Smart, and
Get things done.
That’s it. That’s all you’re looking for. Memorize that. Recite it to yourself before you go to bed every night. You don’t have enough time to figure out much more in a short interview, so don’t waste time trying to figure out whether the candidate might be pleasant to be stuck in an airport with, or whether they really know ATL and COM programming or if they’re just faking it.

People who are Smart but don’t Get Things Done often have PhDs and work in big companies where nobody listens to them because they are completely impractical. They would rather mull over something academic about a problem rather than ship on time. These kind of people can be identified because they love to point out the theoretical similarity between two widely divergent concepts. For example, they will say, “Spreadsheets are really just a special case of prog

kashifrazzaqui

code design guidelines

- when designing libraries its better to leave threads out but not always
  - realize that your users may have varying threading strategies and your lib should not prescribe or assert one lest it resists reuse
  - typical novice problems
    - http://joostdevblog.blogspot.in/2015/01/what-most-young-programmers-need-to.html
      - liar variables, methods, classes
      - muddy classes
      - oversized classes
      - code in comments

kashifrazzaqui

super basic java

- braces
  - define scope
    - no masking/shadowing but new variables are welcome
      "public void kewl()
      {
          int x = 7;
          {
      	int x = 8; //Illegal masking

kashifrazzaqui

import android.graphics.*;
import android.net.Uri;

public class BitmapFileLoader
{
    public static Bitmap loadFromUri(Uri fileUri, float maxWidth, float maxHeight)
    {
        BitmapFactory.Options options = new BitmapFactory.Options();
        options.inJustDecodeBounds = true;
        BitmapFactory.decodeFile(fileUri.getPath(), options);

kashifrazzaqui

Logging is used for 3 primary goals
* debugging
* tracing - understanding execution flow of the program in real life
* checking inputs

There are better tools available for all these three tasks for most usecases
Lets see each case.

Debugging - When a bug is reported the first order of business is to write a test case that fails and this failure clearly indicates that the bug is present - the code is then modified till this test passes (and no other ones fail) - no need for logging