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-module(helpers).

is_pid_alive(Pid) when node(Pid) =:= node() ->
  is_process_alive(Pid);
is_pid_alive(Pid) ->
	lists:member(node(Pid), nodes()) andalso
	(rpc:call(node(Pid), erlang, is_process_alive, [Pid]) =:= true).

get_current_time() ->
  Now = calendar:local_time(),

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Docker Cheat Sheet

Why

Why Should I Care (For Developers)

I don't care, I just want a dev environment

• https://github.com/relateiq/docker_public/
• docker-devenv

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var redisScan = require('redisscan');
var redis     = require('redis');
var riak      = require('riakpbc');
var async     = require('async');
var args      = require('optimist')
    .usage('--import or --export Redis archives in Riak\nUsage: $0')
    .boolean('import')
    .boolean('export')
    .boolean('debug')
    .describe('import', "Import from Riak to Redis")

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Installation of Erlang R16B03-1 and 17.0-rc2 to OS X 10.9.2 with Xcode and wxWidgets 3.0.0

• Note: always set umask 022 for system-shared libraries
• See http://blog.equanimity.nl/blog/2014/02/09/erlang-r17-rc1-on-osx-with-wx-and-a-working-observer/ for the details
• wxWidgets 3.0.0 works the same in R16B03-1 and 17.0-rc2
• Note well: wx:demo() on OS X 10.9.2 with wxWidgets 3.0.0 is still unstable, though observer:start() is more stable.
• If you really don't have time, try Erlang Solutions' 32bit (not 64bit) distribution at https://www.erlang-solutions.com/downloads/download-erlang-otp to use it as a debugging console.
• Update 28-FEB-2014 0230UTC: Leo Liu reports brew install wxmac --disable-monolithic will do. See http://erlang.org/pipermail/erlang-questions/2014-February/077952.html.

Installing wxWidgets

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An RSVP-list demo on top of Riak 2.0 Datatypes

This is a purely in-browser demo of Riak 2.0's sets datatype. The application code uses React.js and jquery.

To get started, make a 5-node devrel cluster of the 2.0 preview using these instructions. After your cluster is built, make a bucket-type for sets:

cd dev/dev1
bin/riak-admin bucket-type create sets '{"props":{"datatype":"set","allow_mult":true}}'
bin/riak-admin bucket-type activate sets

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image.gallery <- function(url, ncol = 3L) {

## This function reformats the contents of a Craigslist search result URL
## into an image gallery, opened into the default browser
##
## Inputs:
##    - url:  a Craigslist search URL as created by search.url
##    - ncol: the number of columns for the output image gallery
##
## Output: none. As a side effect, a browser is opened.

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erlang$1:::*-function-entry
{
  self->funcall_entry_ts[copyinstr(arg1)] = vtimestamp;
}
erlang$1:::function-return
/self->funcall_entry_ts[copyinstr(arg1)]/
{
  @time[copyinstr(arg1)] = quantize((vtimestamp - self->funcall_entry_ts[copyinstr(arg1)] ) / 1000);
}

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deb http://binaries.erlang-solutions.com/debian precise contrib


wget -O - http://binaries.erlang-solutions.com/debian/erlang_solutions.asc | sudo apt-key add -
sudo apt-get update
sudo apt-get install esl-erlang

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Multiple SSH Keys settings for different github account

create different public key

create different ssh key according the article Mac Set-Up Git

$ ssh-keygen -t rsa -C "your_email@youremail.com"

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import urllib2
import re
from BeautifulSoup import *
from datetime import *

symbols = ['YHOO', 'MU', 'AA', 'CI', 'EOG', 'ZMH', 'G', 'HON', 'IWM', 'WYE', 'JCP', 'OXY', 'AAPL', 'SBUX', 'MO', 'KLAC', 'SIRI', 'GDT', 'WMT', 'LLTC', 'PALM', 'EA', 'SUN', 'CL', 'JAVA', 'SMH', 'NBR', 'JNJ', 'GCI', 'SHLD', 'AMD', 'ORCL', 'ERIC', 'LEH', 'WLP', 'CAH', 'LXK', 'CAR', 'CVX', 'GE', 'DE', 'NTAP', 'BSC', 'VRSN', 'DNA', 'GENZ', 'ASKJ', 'BRCM', 'TGT', 'MCD', 'CMCS', 'KBH', 'SYMC', 'BAC', 'NCC', 'BSX', 'IR', 'UNH', 'F', 'ADBE', 'MDY', 'CCL', 'TASR', 'SCHW', 'GS', 'T', 'ADI', 'MON', 'HOG', 'DIA', 'SEPR', 'BTU', 'X', 'D', 'GILD', 'NEM', 'BUD', 'MET', 'CMX', 'AVP', 'MDT', 'QCOM', 'XLNX', 'XOM', 'AMGN', 'OSTK', 'AXP', 'AET', 'GLW', 'KMG', 'GM', 'MXIM', 'APOL', 'SGP', 'IBM', 'MS', 'SNDK', 'BA', 'KO', 'MER', 'RTH', 'M', 'FDC', 'PD', 'XLE', 'XLF', 'FLEX', 'KRB', 'UTX', 'TZOO', 'FDX', 'NKE', 'NXTL', 'DOW', 'HES', 'KSS', 'BP', 'BIIB', 'BBBY', 'SII', 'DELL', 'AIG', 'HIG', 'BBY', 'EBAY', 'RD', 'GPS', 'MERQE', 'PEP', 'IGT', 'CECO', 'ALL', '