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Coding the World a Better Place

Ricardo Ferraz Leal ricleal

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Coding the World a Better Place
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@ricleal
ricleal / database.py
Created October 31, 2013 10:44
Generic mongodb class written in pymongo. It depends from a log and a configparser. Those dependencies are simple to delete.
from pymongo import MongoClient
import logging
logger = logging.getLogger(__name__)
from config.config import configParser
class Database(object):
'''
Generic class to access MongoDB.
@ricleal
ricleal / rvo.cpp
Created December 3, 2013 16:15
RVO: Return value optimization and NRVO: Named return value optimization
/**
* RVO: Return value optimization and NRVO: Named return value optimization
*
* Trying to get the last line of this to work...
*
* Still creates a new object when I assign m14 = fChangeClassRetRef(m14); :(
*
* I guess this is a problem with the compiler itself.
*
*/
@ricleal
ricleal / vietnam_prob.py
Last active September 12, 2015 15:38
vietnam_prob
import numpy as np
res = 66
def eq(x):
return x[0] + 13 * x[1] / x[2] + x[3] + 12 * x[4] - x[5] - 11 + x[6] * x[7] / x[8] - 10
# Brute force!
it = 0
while True:
@ricleal
ricleal / test_proxy.py
Last active July 1, 2018 20:12
UGLY HTTP connection with Auto Proxy & proxy.pac detection on Linux, OSx or Windows
#!/usr/bin/env python
# -*- coding: utf-8 -*-
import urllib2
import json
from pprint import pprint
import sys
import re
@ricleal
ricleal / README.md
Last active September 4, 2015 20:08
Replace Conditions (if statements) with Polymorphism

From the command line create an executable that according to a prototol:

  • http
  • https
  • ftp

Returns a partially built URL: scheme://domain:port

$ ./executable ftp
ftp://ornl.gov:20
@ricleal
ricleal / tornado_mongo.py
Created July 15, 2016 14:17 — forked from bootandy/tornado_mongo.py
Very simple sample code of tornado and mongodb
from datetime import datetime
from pymongo.connection import Connection
import tornado.httpserver
import tornado.ioloop
import tornado.options
import tornado.web
from tornado.options import define, options
@ricleal
ricleal / keybase.md
Created July 26, 2016 17:30

Keybase proof

I hereby claim:

  • I am ricleal on github.
  • I am ricleal (https://keybase.io/ricleal) on keybase.
  • I have a public key whose fingerprint is C09D 6F9F 106D 24E3 F6E5 6146 D02C 956B 145F 841D

To claim this, I am signing this object:

@ricleal
ricleal / urls.py
Created March 28, 2018 21:44
Overriding as_view in Django
#coding: utf-8
from django.conf.urls import url
from .views import PostListView, DummyView
urlpatterns = [
url(r'^$', PostListView.as_view(), name='list'),
url(r'^dummy/$', DummyView.as_view(), name='dummy'),
]
@ricleal
ricleal / README-setup-socket-activated-systemd-service.md
Last active January 18, 2023 15:32 — forked from drmalex07/README-setup-socket-activated-systemd-service.md
An example inetd-like socket-activated service. #systemd #inetd #systemd.socket

Linux sockets and system d

Define a socket unit

The key point here is to specify Accept=yes, which will make the socket accept connections (behaving like inetd) and pass only the resulting connection socket to the service handler.

Create /etc/systemd/system/baz.socket:

[Unit]
@ricleal
ricleal / q2d.py
Created April 15, 2019 21:35
Mantid SANS Qx Qy Data test
import matplotlib.pyplot as plt
import numpy as np
# binnned values
qx = np.linspace(0.001, 0.9, 193)
qy = np.linspace(0.001, 0.7, 257)
dqx = np.sqrt(qx)
dqy = np.sqrt(qy)