Life Long Programmer's Community Log: 2014-02-02

How to use ConcurrentHashMap in Java - Example Tutorial and Working

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Java ConcurrentHashMap

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RStudio

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Working in the RStudio Console

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Ctrl+L — Clear the Console

Ctrl+1 — Move focus to the Source Editor

Ctrl+2 — Move focus to the Console

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PowerShell Tips: Get a Random Sample from CSV File

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PowerShell Tips: Get a Random Sample from CSV File

The Problem I am trying to write and test R script against some data from customer. But the data is too big, it would take a lot of time to load the data and run the script. So it would be to extract a small fraction from the original data. The Solution Fir...

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Powershell: Get default system encoding

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Powershell: Get default system encoding

[System.Text.Encoding]::Default

[System.Text.Encoding]::Default.EncodingName

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#PSTip How to remove the first line from a text file

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#PSTip How to remove the first line from a text file

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PS C:\> $a,$b = Get-Content .\test.txt

PS C:\> $b > .\test.txt

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PSTip: Get-Random

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PSTip: Get-Random

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1..5 | % { (1..49 | Get-Random -Count 6) -join (",") }

when 1..6 | Get-Random -Count 6 cannot display duplicates

do { if( ($num=(Get-Random -Minimum 1 -Maximum 7) ) -notin $nums ){ [int[]]$nums+=$num } } while ( $nums.count -lt 6 ) $nums

the syntax does not support -Count and -Minimum or -Maximum parameters together.

Get-Random -minimum 1 -maximum 101

you can use Get-Random to randomly select from a list of names:

($a = "Dasher","Dancer","Prancer","Vixen","Comet","Cupid","Donder","Blitzen" ) | Get-Random

Get-Random -input "Dasher","Dancer","Prancer","Vixen","Comet","Cupid","Donder","Blitzen"

($a = "Dasher","Dancer","Prancer","Vixen","Comet","Cupid","Donder","Blitzen" ) | Get-Random -count 3

1..10 | % {Get-Random -Minimum 2 -Maximum 20 } | Sort -Unique

1..4 | % { Get-Random -Minimum 1 -Maximum 30 }

$users = gc C:\fso\UserGroupNames.txt

$users | Get-Random -Count $users.Count

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Using Solr DocTransformer to Add Anchor Tag and Text into Response

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Using Solr DocTransformer to Add Anchor Tag and Text into Response

This series talks about how to use Nutch and Solr to implement Google Search's "Jump to" and Anchor links features. This article introduces how to use Nutch, HTML Parser Jsoup and Regular Expression to Extract Anchor Tag and Content The Problem In the searc...

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Google Online Security Blog: Security Reward Programs Update

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Google adds their Chrome apps and extensions to bug bounty

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CTRL-Space always toggles Chinese IME (Windows 7)

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CTRL-Space always toggles Chinese IME

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Solution:

Go to Start > Type in regedit and start it

Navigate to HKEY_CURRENT_USER/Control Panel/Input Method/Hot Keys

Select the key named:

00000070 for the Chinese (Traditional) IME - Ime/NonIme Toggle hotkey

00000010 for the Chinese (Simplified) IME - Ime/NonIme Toggle hotkey

In the right sub-window, there are three subkeys.

Key Modifiers designate Alt/Ctrl/Shift/etc and is set to Ctrl (02c00000).

Virtual Key designates the finishing key and is set to Space (20000000).

Change the first byte in Key Modifiers from 02 to 00

Change the first byte in Virtual Key from 20 to FF

Log off and log back on. I don't think it's necessary to restart.

Do not change the Hot keys for input languages in Control Panel, unless you want to do this all over again.

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LOL! What a douche bag!

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LOL! What a douche bag!

Jeffery yuan (http://ift.tt/1fL2t9c) via The Secret Funny Laughter (http://ift.tt/1fL2tps)

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Invoke-WebRequest

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PowerShell: Sending Http Request

Invoke-WebRequest

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$r = Invoke-WebRequest -URI http://ift.tt/1fIiM6p

$r.AllElements | where {$.innerhtml -like "*=*"} | Sort { $.InnerHtml.Length } | Select InnerText -First 5

PowerShell: Executing a .NET Web Request

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# // first argument is mapped to $url

$url="http://localhost:8983/solr/select?fl=contentid&q=contentid"

param($url)

# // create a request

[Net.HttpWebRequest] $req = [Net.WebRequest]::create($url)

$req.Method = "GET"

$req.Timeout = 600000 # = 10 minutes

# // Set if you need a username/password to access the resource

#$req.Credentials = New-Object Net.NetworkCredential("username", "password");

[Net.HttpWebResponse] $result = $req.GetResponse()

[IO.Stream] $stream = $result.GetResponseStream()

[IO.StreamReader] $reader = New-Object IO.StreamReader($stream)

[string] $output = $reader.readToEnd()

$stream.flush()

$stream.close()

# // return the text of the web page

Write-Host $output

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Tips on Using Adobe Acrobat Reader PDF documents

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Select column in Adobe PDF and Notepad++

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In both Adobde PDF and Notepad++, Alt or "Ctrl+ Alt" puts you in Column Mode Select

To select a column of text (vertically), hold down Ctrl+Alt (Windows) or Option+Command (Mac OS) as you drag the length of the document.

To select multiple columns of text (horizontally), hold down Ctrl (Windows and UNIX) or Option (Mac OS) as you drag across the width of the document.

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google-styleguide

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Google Code Syle Guide

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