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macOS is a Unix, and not built on Linux.

I think most of us realize that macOS isn't a Linux OS, but what that also means is that instead of shipping with the GNU flavor of command line tools, it ships with the FreeBSD flavor. As such, writing shell scripts which can work across both platforms can sometimes be challenging.

Homebrew

Homebrew can be used to install the GNU versions of tools onto your Mac, but they are all prefixed with "g" by default.

All commands have been installed with the prefix "g". If you need to use these commands with their normal names, you can add a "gnubin" directory to your PATH from your bashrc.

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# source: https://www.slideshare.net/CouponFollow/top-100-most-common-coupon-code-phrases           
fall            
twitter            
black            
MEMORIAL            
TWEET20            
FREESHIP            
earlybird            
MONDAY            
holidays            

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#!/usr/bin/env bash

# Method 1

bind -x '"\C-x4": history_and_alias_expand_line';
bind '"\C-x3": history-and-alias-expand-line';
bind -x '"\C-x2": READLINE_LINE_OLD="$READLINE_LINE"';
bind '"\C-x1": "\C-x2\C-x3\C-x4\C-x5"';

function history_and_alias_expand_line {

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== General ==

• [https://gerrit.wikimedia.org/ Wikimedia Code Review] - Gerrit, our code review tool and Git repository
• [https://www.mediawiki.org/wiki/Gerrit/Getting_started Getting started with Git/Gerrit] - Get up and running on Git, Gerrit & Wikimedia Labs
• [https://meta.wikimedia.org/wiki/Research:Data Data hub] - freely-available datasets to play with
• [https://analytics.wikimedia.org Wikimedia Analytics] - traffic analytics

== Events ==

• [https://www.mediawiki.org/wiki/Architecture_meetings Weekly Technical Committee Discussions] - [https://www.mediawiki.org/wiki/Wikimedia_Technical_Committee Technical committee] holds weekly meetings, minutes are public
• [https://www.mediawiki.org/wiki/Wikimedia_Developer_Summit/2018 Wikimedia Developer Summit] (Jan 22-23 2018, San Francisco)
• [https://www.mediawiki.org/wiki/Wikimedia_Hackathon_2018 Wikimedia Hackathon 2018] (May 18-20 2018, Barcelona)

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--[[
	ProFi v1.3, by Luke Perkin 2012. MIT Licence http://www.opensource.org/licenses/mit-license.php.
	
	Example:
		ProFi = require 'ProFi'
		ProFi:start()
		some_function()
		another_function()
		coroutine.resume( some_coroutine )
		ProFi:stop()

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from __future__ import print_function
"""
Utilities for 256 color support in terminals.

Adapted from:
http://stackoverflow.com/questions/1403353/256-color-terminal-library-for-ruby

The color palette is indexed as follows:

0-15: System colors

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What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout. This is also called reflow or layout thrashing, and is common performance bottleneck.

Element

Box metrics

• elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent
• elem.clientLeft, elem.clientTop, elem.clientWidth, elem.clientHeight
• elem.getClientRects(), elem.getBoundingClientRect()

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OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application:

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from socket import *
from xdrlib import Packer, Unpacker

# Set the socket parameters
host = "localhost"
port = 1234
buf = 1024
addr = (host,port)

slope_str2int = {'zero':0,

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function debugAccess(obj, prop, debugGet){

    var origValue = obj[prop];

    Object.defineProperty(obj, prop, {
        get: function () {
            if ( debugGet )
                debugger;
            return origValue;
        },