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1
00:03:59,000 --> 00:04:01,037
ÉÉÉgua, pai!
Essa história é muito joiada!

2
00:04:01,302 --> 00:04:03,707
E os ninjas eram mais invocados
do que corrida de pato!

rpietro

to recursively find a string in multiple files under a directory

grep -R 'string' directory

to recursively find a string in multiple files under a directory and then replace the string with something else

grep -R 'string1' directory | xargs sed -i 's/string1/string2/g'

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Encapsulated experimental math for Bayesian CAT

• Optimal bayesian adaptive design for test-item calibration
  • () 3PL model
    • behavior of ratio of exponential expressions

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code from http://goo.gl/rN6TmB

cd /Users/rpietro/anaconda/lib/python2.7/site-packages/django/bin python django-admin.py startproject website python manage.py startapp homepage rm views.py mkdir views touch views/init.py mkdir templates subl templates/test.html

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Crafting Quality Code

A few notes from Jennifer Campbell & Paul Gries' outstanding Coursera MOOC Crafting Quality Code

Recipe for designing functions

1. examples
2. type contract
3. header

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\[a \in {x|P(x)} \]

\[\mathbb{Z} \]

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# script from http://goo.gl/7m0GGp

# Solving Equations Exactly

x = var('x')
solve(x^2 + 3*x + 2, x)
x, b, c = var('x b c')
solve([x^2 + b*x + c == 0],x)

x, y = var('x, y')

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# source http://goo.gl/1zB4ee

# Calculus I 

f(x)=x^3+1
f(2)
show(f)
lim(f,x=1)
lim((x^2-1)/(x-1),x=1)
lim(f,x=1,dir='-'); lim(f,x=1,dir='right'); f(1)

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# code from http://nltk.org/book

from __future__ import division
import nltk, re, pprint

from urllib import urlopen
url = "http://www.gutenberg.org/files/2554/2554.txt" # crime and punishment
raw = urlopen(url).read()
type(raw)
len(raw)

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# code from http://nltk.org/book

import nltk
# nltk.download() # just go ahead and download everything if you have space
from nltk.book import *
from __future__ import division

text1
text2
text1.concordance("monstrous")