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louisswarren /
Created February 8, 2016 04:19
Keybase proof

Keybase proof

I hereby claim:

  • I am louisswarren on github.
  • I am louisswarren ( on keybase.
  • I have a public key whose fingerprint is 1AC6 4B7A 624E 8409 A7D3 DC0F C405 A798 0B57 F6B7

To claim this, I am signing this object:

def scale_matrix(m, s):
return list(list(s * x for x in row) for row in m)
def print_matrix(m):
print('--' + ' ' * (len(m[0]) * 10) + '--')
for row in m:
print('| ', end='')
for x in row:
print('{:10.2f}'.format(x), end='')
print(' |')
from sys import argv
text = ''.join(argv[1:]).upper().replace(' ', '')
print(' '.join(text))
louisswarren / pcat
Last active March 27, 2016 05:28
Script for viewing long files in tty using only head, tail, echo, bc
# Use to view long files without more or less
# One-liner so that it may be easily echo'd to /bin/pcat instead of using ed
# Usage:
# pcat filename pagenum
head -n $(echo "$2 * 20" | bc) $1 | tail -n 20
louisswarren /
Last active April 30, 2016 06:36
Guess what a function converges to
import itertools
def adjacent_pairs(g):
a, b = itertools.tee(g)
return zip(a, b)
def converge(f, vals, e=1e-9):
for a, b in adjacent_pairs(vals):
if abs(f(a) - f(b)) < e:
louisswarren /
Last active April 30, 2016 06:32
Test Taylor series approximations to sin
from math import factorial, pi, sin
def max_diff(f, g, v):
return max(abs(f(x) - g(x)) for x in v)
def zigrange(x, s=1.0):
yield 0
for y in range(1, int(x / s + 0.5) + 1):
yield y * s;
yield -y * s;
louisswarren /
Last active June 6, 2016 00:01
Functions with human-readable representations
def named_func(f):
return type('named_func', (), {
'__call__': lambda s, *a, **k: f(*a, **k),
'__repr__': lambda s: f.__name__,
'__name__': f.__name__,
'__doc__': f.__doc__,
>>> @named_func
louisswarren /
Last active June 7, 2017 06:37
Use with blocks in python to assign a shorter name to a variable
class mutate(Exception):
class alias:
def __init__(self, obj):
self.obj = obj
def __enter__(self):
return self.obj
louisswarren / generics.c
Last active July 29, 2017 05:22
Generics in C
/* See */
#include <stdio.h>
#include "sum.h"
int main(void)
louisswarren /
Last active June 26, 2016 10:04
Configure device as a wifi bridge
/sbin/ifconfig eth0 netmask up
/sbin/iptables -t nat -A POSTROUTING -o wlan0 -j MASQUERADE
echo "1" | /usr/bin/tee /proc/sys/net/ipv4/ip_forward