chalg

Decision Tree Classification models to predict employee turnover

In this project I have attempted to create supervised learning models to assist in classifying certain employee data. The classes to predict are as follows:

• Active - the employee is still in their role
• Non-active - the employee has resigned

I pre-processed the data by removing one outlier and producing new features in Excel as the data set was small at 1056 rows. Some categorical features were also converted to numeric values in Excel. For example, Gender was originally "M" or "F", which was converted to 0 and 1 respectively. I also removed employee number as it provides no value as a feature and could compromise privacy.

After doing some research, see References, I found that the scikit-learn library does not handle categorical (string) features correctly in Decision Trees using the above approach. When added, these features provided no increase in accuracy, so I removed them. For example; Department, some departments have a highe

earlonrails

package testhelpers

import (
  "fmt"
  "net/http"
  "net/http/httptest"
  "net/url"
  "github.com/jmcvetta/neoism"
)

josephspurrier

// Source: http://nicolasmerouze.com/guide-routers-golang/

// Package httprouterwrapper allows the use of http.HandlerFunc compatible funcs with julienschmidt/httprouter
package httprouterwrapper

import (
	"net/http"

	"github.com/gorilla/context"
	"github.com/julienschmidt/httprouter"

josephspurrier

/*
********************************************************************************
Golang - Asterisk and Ampersand Cheatsheet
********************************************************************************

Also available at: https://play.golang.org/p/lNpnS9j1ma

Allowed:
--------
p := Person{"Steve", 28} 	stores the value

earlonrails

#Feature/Flow

##Git Flow

Here is some good reading on gitflow for the basic concepts:

http://nvie.com/posts/a-successful-git-branching-model/

https://www.atlassian.com/git/tutorials/comparing-workflows/gitflow-workflow

rahulsom

#!/bin/bash -e
USERNAME=$(whoami)
sudo /usr/sbin/jamf removeFramework
sudo dscl . -mcxdelete /Computers/localhost || echo "No /Computers/localhost"
sudo dscl . -mcxdelete /Users/${USERNAME}
sudo rm -rf /Users/${USERNAME}/Library/Preferences/com.apple.finder.plist
echo "..Done"

vongosling

LInux

Three system configuration parameters must be set to support a large number of open files and TCP connections with large bursts of messages. Changes can be made using the /etc/rc.d/rc.local or /etc/sysctl.conf script to preserve changes after reboot.

1. /proc/sys/fs/file-max: The maximum number of concurrently open files.

fs.file-max = 1000000

2. /proc/sys/net/ipv4/tcp_max_syn_backlog: Maximum number of remembered connection requests, which are still did not receive an acknowledgment from connecting client. The default value is 1024 for systems with more than 128Mb of memory, and 128 for low memory machines.

net.ipv4.tcp_max_syn_backlog = 3240000

3. /proc/sys/net/core/somaxconn: Limit of socket listen() backlog, known in userspace as SOMAXCONN. Defaults to 128.

net.core.somaxconn = 3240000

KWMalik

##Google Interview Questions: Product Marketing Manager

• Why do you want to join Google? -- Because I want to create tools for others to learn, for free. I didn't have a lot of money when growing up so I didn't get access to the same books, computers and resources that others had which caused money, I want to help ensure that others can learn on the same playing field regardless of their families wealth status or location.
• What do you know about Google’s product and technology? -- A lot actually, I am a beta tester for numerous products, I use most of the Google tools such as: Search, Gmaill, Drive, Reader, Calendar, G+, YouTube, Web Master Tools, Keyword tools, Analytics etc.
• If you are Product Manager for Google’s Adwords, how do you plan to market this?
• What would you say during an AdWords or AdSense product seminar?
• Who are Google’s competitors, and how does Google compete with them? -- Google competes on numerous fields: --- Search: Baidu, Bing, Duck Duck Go

MohamedAlaa

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

earlonrails

#!/usr/local/bin/ruby
require 'shellwords'

args = ARGV
size = args.size
tab_open = 'tell i term application "System Events" to keystroke "t" using {command down}'
v_pane_open = 'tell i term application "System Events" to keystroke "d" using {command down}'
h_pane_open =  'tell i term application "System Events" to keystroke "d" using {command down, shift down}'
go_left_one_pane = 'tell i term application "System Events" to key code 123 using {command down, option down}'
script_builder = Proc.new do |tell, command|