vilcans

#!/usr/bin/env python

# Python 2 utility for converting an image file to the raw frame buffer format
# used by VZ (and others devices using the MC6847 chip) in graphics mode.

import sys

from array import array

from PIL import Image

vilcans

#!/usr/bin/env python

# Convert a raw memory dump to a z80 snapshot

import struct
import re
import argparse

compress_re = re.compile(r'(.)\1{1,254}')

vilcans

"""
TL;DR for http://www.librador.com/2014/07/10/Variable-scope-in-list-comprehension-vs-generator-expression/

In Python 2, a list comprehension "leaks" its variable into the current scope,
while a generator expression does not.
This means that there's a subtle difference between
`list(x for x in y)` and `[x for x in y]`.

Example:

vilcans

#!/usr/bin/env python

"""Transforms an 8x8 matrix using DCT,
quantizes the result,
then transforms it back.
"""

from __future__ import division
from math import sqrt, cos, pi, floor

vilcans

# Create a convenient property creator function
Function::property = (properties) ->
  for name, descriptor of properties
    Object.defineProperty @prototype, name, descriptor
  return

# Usage example:
class Circle
  constructor: (@radius) ->

vilcans

>>> z = 42
42
>>> z.foo = 7
7
>>> z.foo
undefined

vilcans

# Calculate a number in a Fibonacci series,
# starting at fib(0) == 0 and fib(1) == 1.
# An iterative and a recursive implementation.
# Which one most clearly shows what the code does?

def iterative_fibonacci(x):
    a, b = 0, 1
    for n in range(x):
        a, b = b, a + b
    return a

vilcans

This is the code I use for the tag cloud at www.librador.com:

{% for tag in site.tags %}
  {% assign t = tag.first %}
  {% assign posts = tag.last %}
  <a class="tag tag{{ posts | size }}" href="/tags/#tag-{{ t | to_id }}">{{ t }}</a>
{% endfor %}

It expects there to be a CSS class called tag and several ones called tag1, tag2, tag3 etc, where the number is the number of posts with that tag. Here's my version:

vilcans

import urllib
print 'javascript:' + urllib.quote("""
(function(){
var e = document.createElement('script');
e.src='/boot.js';
e.type='text/javascript';
document.getElementsByTagName('body')[0].appendChild(e);})()
""".strip().replace('\n', ' '))