gistfile1.sh

# Adds a new host entry on the hosts file as shown:
#
# add-host www.southworks.net 127.0.0.1 [optional $true|$false]
# 
# the third parameter indicates whether if exists it should be overwritten
function add-host {
 # map parameters 
 $hostname, $address, $override = $args[0], $args[1], ($args[2] -eq $true)
 
 # generte some basics
 $hosts, $entry = (gc hosts), "$hostname       $address"

 if([regex]::match($hosts, "\s*$hostname\s*").success){
  # it already existed but chose not override 
  if(-not $override) { return; }
  clear-content hosts
  $hosts | where-object{[regex]::match($_, "\s*$hostname\s.*$").success -eq $false} | add-content hosts
 } 
 
 # now append it
 add-content hosts $entry
}