Powershell - some tip

1. Let your computer can run powershell script : Set-ExecutionPolicy RemoteSigned
2. 將使用者需要互動輸入的選項，自動帶入指令中 :
   因在build software時，會進入cygwin的環境中，並需輸入選項去build, 為將整個動作自動化
1. 單一次選項時 :  sunny || .\login.bat ==> 執行login.bat時，會等待user輸入其名字再做login, 此時利用pipeline, powershell 會自動將 'sunny' input 
2. 需多次輸入時 :　
   ps >@' [enter]
   >> input1 [enter]
   >> input2 [enter]
   >> '@  | command
3. refer to : http://powershell.com/cs/blogs/tips/archive/2009/07/15/feeding-input-into-native-commands.aspx
3. Execute powershell script (.ps1 file) as a command (可應用於task scheduler中) :
   powershell.exe -command "&{d:\ps\sample.ps1 arg1 arg2}"
4. Print all System variable
   

   Get-ChildItem -Path Variable: `
          | Add-Member `
                 -Name Type `
                 -MemberType ScriptProperty `
                 -Value { $this.GetType().FullName } `
                 -PassThru `
          | Add-Member `
                 -Name DisplayValue `
                 -MemberType ScriptProperty `
                 -Value { (Get-Variable -Name $this.Name -Scope 1 -ValueOnly | Format-List -Property * | Out-String).Trim("`r`n") } `
                 -PassThru `
          | Sort-Object -Property Name `
          | Format-List -Property Name,Type,Description,Value,DisplayValue,Options `
          | Out-Host -Paging

5.