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@interface MyView : UIView
- (void)kissMyAss;
@end

@interface _MyViewIOS6 : MyView
@end

@interface _MyViewIOS7 : MyView
@end

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{% capture the_collection %}{{page.collection}}{% endcapture %}
  {% if page.collection %}
    {% assign  document = site[the_collection]  %}
  {% endif %}
<h1>TITLE: {{ page.title }}</h1>
{% for links in document  %}
  {% if links.title == page.title %}
    {% unless forloop.first %}
      {% assign prevurl = prev.url %}
    {% endunless %}

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Types

A type is a collection of possible values. An integer can have values 0, 1, 2, 3, etc.; a boolean can have values true and false. We can imagine any type we like: for example, a HighFive type that allows the values "hi" or 5, but nothing else. It's not a string and it's not an integer; it's its own, separate type.

Statically typed languages constrain variables' types: the programming language might know, for example, that x is an Integer. In that case, the programmer isn't allowed to say x = true; that would be an invalid program. The compiler will refuse to compile it, so we can't even run it.

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#!/bin/sh

command="${*}"
printf "Initialized REPL for [%s]\n" "$command"
printf "%s> " "$command"
read -r input
while [ "$input" != "" ];
do
    eval "$command $input"
    printf "\n%s> " "$command"

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Transforming Code into Beautiful, Idiomatic Python

Notes from Raymond Hettinger's talk at pycon US 2013 video, slides.

The code examples and direct quotes are all from Raymond's talk. I've reproduced them here for my own edification and the hopes that others will find them as handy as I have!

Looping over a range of numbers

for i in [0, 1, 2, 3, 4, 5]:

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#System Design Interview 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?

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Project Name

TODO: Write a project description

Installation

TODO: Describe the installation process

Usage

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// Swift Standard Librray - String

// ====
// Initializing a String
// ====

var emptyString = ""        // Empty String
var stillEmpty = String()   // Another empty String
let helloWorld = "Hello World!" // String inferred

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// In languages like Python and Haskell, we can write list comprehension syntax like
// super simply to generate complex lists. Below, for example, we find all numbers that are
// the product of two sides of a triangle.
//   [a * b | a <- [1..10], b <- [1..10], c <- [1..10], a * a + b * b == c * c]

// Why is this called nondeterministic computation? Because we essentially try ALL possible combinations
// of these values (a,b) and--you can imagine--run them all simultanously and get the result that matches the predicate.
// Now, obviously, this doesn't all happen at the same time, but that's the idea behind the nondeterminism.

// Let's examine how we can get a similiar result in Swift! We'll start super simple and work

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#!/bin/bash

usage() {
  cat << EOF
Usage: $0 [OPTION]... COMMAND
Execute the given command in a way that works safely with cron. This should
typically be used inside of a cron job definition like so:
* * * * * $(which "$0") [OPTION]... COMMAND

Arguments: