camilohe

Latency Comparison Numbers (~2012)
----------------------------------
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        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

camilohe

Code is clean if it can be understood easily – by everyone on the team. Clean code can be read and enhanced by a developer other than its original author. With understandability comes readability, changeability, extensibility and maintainability.

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General rules

1. Follow standard conventions.
2. Keep it simple stupid. Simpler is always better. Reduce complexity as much as possible.
3. Boy scout rule. Leave the campground cleaner than you found it.
4. Always find root cause. Always look for the root cause of a problem.

Design rules

camilohe

#Requires –Version 3

#Get WindowsUpdate List for offline patch
function Get-WindowsUpdateFileList
{
param(
    [Parameter(Mandatory=$True)]
    [string] $Filter
)
    $objSession = New-Object -ComObject "Microsoft.Update.Session"

camilohe

#Install SysInternals BGInfo/AutoLogon tools
function Install-SysInternalsTool
{
    #Target directory is %WinDir%C:\Windows\System32\SysInternals
    $targetDir = Join-Path $env:WinDir "System32\SysInternals"

    #Tools to be downloaded
    $tools = @{
        Bginfo    = "http://live.sysinternals.com/Bginfo.exe"
        Autologon = "http://live.sysinternals.com/Autologon.exe"

camilohe

function Get-EventLogError
{
[CmdletBinding()]
param(
[Parameter(Mandatory,ParameterSetName="FromLastBootupTime")]
[switch] $FromLastBootupTime,
[Parameter(Mandatory,ParameterSetName="FromLastQueryTime")]
[switch] $FromLastQueryTime,
[Parameter(Mandatory,ParameterSetName="Range")]
[DateTime] $From,

camilohe

#Requires -Version 3

#Credential file path
$script:CredentialsFile = Join-Path $env:TEMP "SavedCredentials\Credentials.xml"

function Set-SavedCredential()
{
[CmdletBinding()]
param(
    [Parameter(Mandatory)]

camilohe

#if ComputerName is not supplied. Connect to "internetbeacon.msedge.net" by default
Test-NetConnection

#Test ping(ICMP protocol)
Test-NetConnection "google.com"

#Ping with TraceRoute
Test-NetConnection "google.com" -TraceRoute

#Set Remote ComputerName

camilohe

#TODO:support for non serializable object(example:PSCustomObject)
function Out-HtmlView
{
[CmdletBinding()]
param(
    [Parameter()]
    [int]$Depth = 2,
    [Parameter(Mandatory,ValueFromPipeLine)]
    $InputObject
)

camilohe

function Main
{
    #Execute Query(Note:Github Search API return up to 1000 results for each search.)
    $results = Find-GitHubRepository -Filter "language:powershell+created:>=2013-12-01&sort=stars" -Verbose

    #Show Results
    Write-Host ("Total Repositry Count    : {0}" -f $results.total_count)
    Write-Host ("Returned Repository Count: {0}" -f $results.items.Count)
    $selectedItems = $results.items | select name, description, html_url, fork | Out-GridView -OutputMode Multiple

camilohe

#Write-Host "Load script files..." -ForegroundColor DarkGray

$scriptFiles = Get-ChildItem "$PSScriptRoot\*.ps1" -Exclude "*.Tests.ps1" -Recurse
foreach ($script in $scriptFiles)
{
    #Write-Host "`tLoad script:" $script.Name -ForegroundColor DarkGray
    try
    {
        #TODO: Suppress $Error entry recorded after module loading completed(can't suppress inside psm1 module?)
        . $script.FullName