wolever

"""
A simple watchdog for long running processes which may stall for some reason or
another.

If the main thread hasn't logged progress (by updating
``self.last_progress_time``) in WATCHDOG_HARD_KILL_TIMEOUT, the watchdog
thread will log an error containing the stack trace of all currently running
threads then use ``kill -9`` to kill the main process.

Assumes that a process monitor like supervisor or systemd will then restart

wolever

#!/bin/bash

IFS="`printf "\n\t"`"
set -eu
cd "`dirname "$0"`"

outfile="/dev/null"

if [[ "${1-}" == "-v" ]]; then
    outfile="/dev/stdout"

wolever

-- HANDLE SCROLLING WITH MOUSE BUTTON PRESSED
local scrollMouseButton = 3
local deferred = false

overrideOtherMouseDown = hs.eventtap.new({ hs.eventtap.event.types.otherMouseDown }, function(e)
    -- print(hs.eventtap.event.properties['mouseEventButtonNumber'])
    local mouseButton = e:getProperty(hs.eventtap.event.properties['mouseEventButtonNumber'])
    if mouseButton == scrollMouseButton then 
        deferred = true
        return true

wolever

from functools import wraps

def patch_objects_get(cls):
    """ Patch 'cls.objects.get' so its DoesNotExist errors will be more
        helpful.
        
        Usage:

        >>> @patch_objects_get
        ... class MyModel(m.Model):

wolever

/**
 * A LocalStorage-based mutex. Guarantees¹ that only one browser window will be
 * able to execute the code inside the callback at a time.
 *
 * Based on the Alur and Taubenfeld fast lock
 * (http://www.cs.rochester.edu/research/synchronization/pseudocode/fastlock.html)
 * with an added timeout to ensure there will be eventual progress in the event
 * that a window is closed in the middle of the callback.
 *
 * 1. The guarantee assumes that the algorithm is correctly implemented.

wolever

# Call `setup_ssh_socket` to setup the control socket (function will return once
# the socket is ready to go), and `ssh_target` will connect using the control socket.
# Assumes TARGET_HOST variable is set.
# The connection is automatically closed when the script exists.
# TARGET_HOST="wolever.net"
# setup_ssh_control_socket
# ssh_target "hostname"

debug() {
    echo "DEBUG: $*"

wolever

from pqueue import PersistentQueue

q1 = PersistentQueue("/tmp/queue_storage_dir")
q1.put("1")
q1.put("2")
q1.put("3")
q1.close()

q2 = PersistentQueue("/tmp/queue_storage_dir")
while not q2.empty():

wolever

Fractional indexing is a technique for assigning a rank to ordered items, where an item's position can be changed - or a new item introduced - with only one rank value update.

For example, given the items:

{ name: "a", rank: 1 }
{ name: "c", rank: 2 }

With a naive rank ordering scheme, introducing "b" in between "a" and "c" would

wolever

'''
adminreverse from here http://djangosnippets.org/snippets/2032/
changed for working with ForeignKeys
'''
'''
reverseadmin
============
Module that makes django admin handle OneToOneFields in a better way.
A common use case for one-to-one relationships is to "embed" a model
inside another one. For example, a Person may have multiple foreign

wolever

-- Functions to create and draw histograms with PostgreSQL.
--
-- psql# WITH email_lengths AS (
--    -#    SELECT length(email) AS length
--    -#    FROM auth_user
--    -#    LIMIT 100
--    -# )
--    -# SELECT * FROM show_histogram((SELECT histogram(length, 0, 32, 6) FROM email_lengths))
--  bucket |                range                | count |              bar               |             cumbar             | cumsum |         cumpct         
-- --------+-------------------------------------+-------+--------------------------------+--------------------------------+--------+------------------------