A better new-alias for PowerShell

new-alias.ps1

<#
.SYNOPSIS

Creates a new alias. Better than original New-Alias

.DESCRIPTION

Creates a new Function Alias. Unlike the original New-Alias, this will let you 
create an alias that can be a command line or script, in a single command.

.PARAMETER Name
Specifies the new alias. You can use any alphanumeric characters in an alias, but the first character cannot be a number.

.PARAMETER Value
Specifies the name of the cmdlet or command element that is being aliased. 
This may be a scriptblock, or a string, or it will consume the remaining 
arguments as a command line.

If a scriptblock is given, use of $args will gain access to the arguments
passed to the alias

If a string is given and $args is not in the string, $args will be added to the
end of the command. 

If a string is given and $args is present, it will not add $args on the end.

(this preserves functionality with the original new-alias)

.EXAMPLE

Creates an alias "List" which just calls Get-ChildItem with whatever arugments 
are passed.

C:\PS> New-Alias List Get-ChildItem

.EXAMPLE

Creates an alias "List" which just calls Get-ChildItem with whatever arugments 
are passed.

C:\PS> New-Alias List {Get-ChildItem  $args}


.EXAMPLE

Creates an alias "List" which just calls Get-ChildItem with whatever arugments 
are passed, and then extracts out the full name of each file

C:\PS> New-Alias List { get-ChildItem $args |% {$_.FullName} }


.EXAMPLE

Creates an alias "d" which just calls dir with whatever arugments 
are passed, and tacks on an exclude.

C:\PS> New-Alias d 'dir $args -exclude *.json'
#>
function new-alias([parameter(mandatory=$true, position=0)][string]$name,[parameter(mandatory=$true, position=1, ValueFromRemainingArguments=$true)]$value ) {
  if($value[0] -is [Scriptblock]) {
    set-Item "function:global:$name" $value[0]
  } else {
    if( "$value".indexOf('$args') -gt -1) {
      set-Item "function:global:$name" ([ScriptBlock]::Create("$value"))    
    } else {
      set-Item "function:global:$name" ([ScriptBlock]::Create("$value `$args"))    
    }
  }
}

new-alias sort-clipboard {get-clipboard | Sort-Object | get-unique | Set-Clipboard}