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Pavel RaidoS

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@oinopion
oinopion / read-access.sql
Created October 5, 2016 13:00
How to create read only user in PostgreSQL
-- Create a group
CREATE ROLE readaccess;
-- Grant access to existing tables
GRANT USAGE ON SCHEMA public TO readaccess;
GRANT SELECT ON ALL TABLES IN SCHEMA public TO readaccess;
-- Grant access to future tables
ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT SELECT ON TABLES TO readaccess;

Easy responsive sprites with background-size using grunt-spritesmith and SCSS

Requires grunt-spritesmith which generates a spritesheet from a bunch of images.

This gist passes a custom template for spritesmith to generate the SCSS file.

Gruntfile.js

sprite: {
 src: "images/*.png",
@scottrogowski
scottrogowski / pixelate.py
Last active August 21, 2024 21:23
Pixelate image in python
#!/usr/bin/env python
# This script will pixelate most jpg and png images
# It will both show you the result and save it
import sys
import matplotlib.pyplot as plt
import numpy as np
import PIL.Image as Image
@douglasmiranda
douglasmiranda / option1.py
Last active April 25, 2024 09:10
Fix: Django Debug Toolbar not showing when using with Docker.
# YOU MAY WANT TO CHECK THIS OUT: https://github.com/douglasmiranda/ddpt/blob/master/{{cookiecutter.django_project_name}}/{{cookiecutter.django_project_name}}/config/local.py
# If you don't do this you will have to add the host IP in INTERNAL_IPS = ('127.0.0.1',)
# And it will change, then you will have to change INTERNAL_IPS again.
def show_toolbar(request):
if request.is_ajax():
return False
return True
@Kartones
Kartones / postgres-cheatsheet.md
Last active April 29, 2025 14:50
PostgreSQL command line cheatsheet

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

  • -E: will describe the underlaying queries of the \ commands (cool for learning!)
  • -l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)
@rxaviers
rxaviers / gist:7360908
Last active April 29, 2025 17:19
Complete list of github markdown emoji markup

People

:bowtie: :bowtie: πŸ˜„ :smile: πŸ˜† :laughing:
😊 :blush: πŸ˜ƒ :smiley: ☺️ :relaxed:
😏 :smirk: 😍 :heart_eyes: 😘 :kissing_heart:
😚 :kissing_closed_eyes: 😳 :flushed: 😌 :relieved:
πŸ˜† :satisfied: 😁 :grin: πŸ˜‰ :wink:
😜 :stuck_out_tongue_winking_eye: 😝 :stuck_out_tongue_closed_eyes: πŸ˜€ :grinning:
πŸ˜— :kissing: πŸ˜™ :kissing_smiling_eyes: πŸ˜› :stuck_out_tongue:
from django import http
from django.conf import settings
"""
Put this file in a directory called, eg, 'middleware,' inside your django
project. Make sure to create an __init__.py file in the directory so it can
be included as a module.
Set the values for
XS_SHARING_ALLOWED_ORIGINS
XS_SHARING_ALLOWED_METHODS
@jessykate
jessykate / django-crossdomainxhr-middleware.py
Created June 16, 2012 12:44 — forked from vicalejuri/django-crossdomainxhr-middleware.py
Middlware to allow's your django server to respond appropriately to cross domain XHR (postMessage html5 API).
import re
from django.utils.text import compress_string
from django.utils.cache import patch_vary_headers
from django import http
'''
EXAMPLE USAGE:
Put this file in a directory called, eg, 'middleware,' inside your django
@jboner
jboner / latency.txt
Last active April 29, 2025 15:40
Latency Numbers Every Programmer Should Know
Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference 0.5 ns
Branch mispredict 5 ns
L2 cache reference 7 ns 14x L1 cache
Mutex lock/unlock 25 ns
Main memory reference 100 ns 20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy 3,000 ns 3 us
Send 1K bytes over 1 Gbps network 10,000 ns 10 us
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD