wwgist

Latency Comparison Numbers
--------------------------
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
Send 1K bytes over 1 Gbps network        10,000   ns    0.01 ms
Read 4K randomly from SSD*              150,000   ns    0.15 ms

wwgist

# PostgreSQL hints

psql [option...] [dbname [username]]

-U  >   username    (default=unix_user) VEVAR=PGUSER
-W  >   password
-w  >   no-password
-d  >   dbname              VEVAR=PGDATABASE
-h  >   hostname    (default=unix_socket/localhost) VEVAR=PGHOST
-p  >   port        (default=default)

wwgist

# MySQL hints

mysql [OPTIONS] [database]
mysqladmin [OPTIONS] command command....

-u  >   user
-p  >   password
-D  >   database
-h  >   host
-P  >   port

wwgist

# -*- coding: utf-8 -*-
# При вызове метода __new__ каждый раз возвращается один и тот же объект.
# Хранится объект в классовой переменной.


# переопределение __new__ (поверхностно)
class C(object):
    instance = None
    def __new__(cls):
        if cls.instance is None:

wwgist

"""
Class object creation methods
"""


class Meta(type):
    pass


# 1) via definition:

wwgist

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import sys
import time


reps = 1000
repslist = range(reps)

wwgist

# #########################################################################
# This bash script adds tab-completion feature to django-admin.py and
# manage.py.
#
# Testing it out without installing
# =================================
#
# To test out the completion without "installing" this, just run this file
# directly, like so:
#

wwgist

# ~/.bashrc: executed by bash(1) for non-login shells.
# see /usr/share/doc/bash/examples/startup-files (in the package bash-doc)
# for examples

# If not running interactively, don't do anything
[ -z "$PS1" ] && return

# don't put duplicate lines in the history
export HISTCONTROL=ignoreboth:erasedups
# set history length

wwgist

<!-- via control upload -->
<input type="file" id="your-files" multiple>
<script>
var control = document.getElementById("your-files");
control.addEventListener("change", function(event) {

    // When the control has changed, there are new files

    var i = 0,
        files = control.files,

wwgist

# file  rule
#----------------
*       text=auto
*.rb    text
*.js    text

*.bat   text eol=crlf
*.sh    text eol=lf

*.png   binary