Sarah and I are back from Munich, Germany as of Thursday and I've just about recovered. The trip there via Air France we watched many movies and
it was much better than the trip back in which the entertainment system failed and I had a cold. When we arrived, Jon met us at the airport, helped us with the subway system, we played Guitar Hero,
ate at a Bavarian pub, and then later at an Australian bar.
The following day we met up with Jon and three of his friends, one of
whom was visiting from England and we all took a train to Neuschwanstein Castle. Apparently its the 'Disney' castle in that Disney's castle's are based upon it. The castle is filled with images and
statues of swans in homage to the Swan Knight. We ate in the town at a cafe with traditional Bavarian food before taking the train back and getting all you can eat fajitas for dinner.
sequelguy posted a photo:
Horse drawn carriage was an alternative to the bus to the castle.
PowerShell gives us a real CLI for Windows based around .Net stuff. I don't like the creation of a new shell language but I suppose it makes sense given that they want something C# like but not C# exactly since that's much to verbose and strict for a CLI. One of the functions you can override is the TabExpansion function which is used when you tab complete commands. I really like this and so I've added on to the standard implementation to support replacing a variable name with its value, tab completion of available commands, previous command history, and drive names (there not restricted to just one letter in PS).
Learning the new language was a bit of a chore but MSDN helped. A couple of things to note, a statement that has a return value that you don't do anything with is implicitly the return value for the current function. That's why there's no explicit return's in my TabExpansion function. Also, if you're TabExpansion function fails or returns nothing then the builtin TabExpansion function runs which does just filenames. This is why you can see that the standard TabExpansion function doesn't handle normal filenames: it does extra stuff (like method and property completion on variables that represent .Net objects) but if there's no fancy extra stuff to be done it lets the builtin one take a crack.
Here's my TabExpansion function. Probably has bugs, so watch out!
function EscapePath([string] $path, [string] $original)
{
if ($path.Contains(' ') -and !$original.Contains(' '))
{
'"' $path '"';
}
else
{
$path;
}
}
function PathRelativeTo($pathDest, $pathCurrent)
{
if ($pathDest.PSParentPath.ToString().EndsWith($pathCurrent.Path))
{
'.\' $pathDest.name;
}
else
{
$pathDest.FullName;
}
}
# This is the default function to use for tab expansion. It handles simple
# member expansion on variables, variable name expansion and parameter completion
# on commands. It doesn't understand strings so strings containing ; | ( or { may
# cause expansion to fail.
function TabExpansion($line, $lastWord)
{
switch -regex ($lastWord)
{
# Handle property and method expansion...
'(^.*)(\$(\w|\.) )\.(\w*)$' {
$method = [Management.Automation.PSMemberTypes] `
'Method,CodeMethod,ScriptMethod,ParameterizedProperty'
$base = $matches[1]
$expression = $matches[2]
Invoke-Expression ('$val=' $expression)
$pat = $matches[4] '*'
Get-Member -inputobject $val $pat | sort membertype,name |
where { $_.name -notmatch '^[gs]et_'} |
foreach {
if ($_.MemberType -band $method)
{
# Return a method...
$base $expression '.' $_.name '('
}
else {
# Return a property...
$base $expression '.' $_.name
}
}
break;
}
# Handle variable name expansion...
'(^.*\$)([\w\:]*)$' {
$prefix = $matches[1]
$varName = $matches[2]
foreach ($v in Get-Childitem ('variable:' $varName '*'))
{
if ($v.name -eq $varName)
{
$v.value
}
else
{
$prefix $v.name
}
}
break;
}
# Do completion on parameters...
'^-([\w0-9]*)' {
$pat = $matches[1] '*'
# extract the command name from the string
# first split the string into statements and pipeline elements
# This doesn't handle strings however.
$cmdlet = [regex]::Split($line, '[|;]')[-1]
# Extract the trailing unclosed block e.g. ls | foreach { cp
if ($cmdlet -match '\{([^\{\}]*)$')
{
$cmdlet = $matches[1]
}
# Extract the longest unclosed parenthetical expression...
if ($cmdlet -match '\(([^()]*)$')
{
$cmdlet = $matches[1]
}
# take the first space separated token of the remaining string
# as the command to look up. Trim any leading or trailing spaces
# so you don't get leading empty elements.
$cmdlet = $cmdlet.Trim().Split()[0]
# now get the info object for it...
$cmdlet = @(Get-Command -type 'cmdlet,alias' $cmdlet)[0]
# loop resolving aliases...
while ($cmdlet.CommandType -eq 'alias') {
$cmdlet = @(Get-Command -type 'cmdlet,alias' $cmdlet.Definition)[0]
}
# expand the parameter sets and emit the matching elements
foreach ($n in $cmdlet.ParameterSets | Select-Object -expand parameters)
{
$n = $n.name
if ($n -like $pat) { '-' $n }
}
break;
}
default {
$varNameStar = $lastWord '*';
foreach ($n in @(Get-Childitem $varNameStar))
{
$name = PathRelativeTo ($n) ($PWD);
if ($n.PSIsContainer)
{
EscapePath ($name '\') ($lastWord);
}
else
{
EscapePath ($name) ($lastWord);
}
}
if (!$varNameStar.Contains('\'))
{
foreach ($n in @(Get-Command $varNameStar))
{
if ($n.CommandType.ToString().Equals('Application'))
{
foreach ($ext in @((cat Env:PathExt).Split(';')))
{
if ($n.Path.ToString().ToLower().EndsWith(($ext).ToString().ToLower()))
{
EscapePath($n.Path) ($lastWord);
}
}
}
else
{
EscapePath($n.Name) ($lastWord);
}
}
foreach ($n in @(Get-psdrive $varNameStar))
{
EscapePath($n.name ":") ($lastWord);
}
}
foreach ($n in @(Get-History))
{
if ($n.CommandLine.StartsWith($line) -and $n.CommandLine -ne $line)
{
$lastWord $n.CommandLine.Substring($line.Length);
}
}
# Add the original string to the end of the expansion list.
$lastWord;
break;
}
}
}
I finally replaced my old regular cell-phone which was literally being held together by a rubber band with a fancy new G1, my first Internet accessible phone.
I had to call the T-Mobile support line to get data added to my plan and the person helping me was disconcertingly friendly. She asked about my weekend plans and so I felt compelled to ask her the same. Her plans involved replacing her video card so she could get back to World of Warcraft and do I enjoy computer gaming? I couldn't tell if she was genuine or if she was signing me up for magazines.
I was with Sarah in her new car, trying out the phone's GPS functionality via Google Maps while she drove. I switched to Street View and happened to find my car. It was a weird feeling, kind of like those Google conspiracy videos.
The phone runs Google's open source OS and I really enjoy the application API. Its all in Java and URIs and mime-types are sort of basics. Rather than invoking the builtin item picker control directly you invoke an 'intent' specifying the URI of your list of items, a mime-type describing the type of items in the list, and an action 'PICK' and whatever is registered as the picker on the system pops up and lets the user pick from that list. The same goes if you want to 'EDIT' an image, or 'VIEW' an mp3.
I wanted to replace the Google search box gadget that appears on the home screen with my own search box widget that uses OpenSearch descriptors but apparently in the current API you can't make home screen gadgets without changing parts of the OS. My other desired application is something to replace this GPS photo tracker device by recording my location to a file and an additional program on my computer to apply those locations to photos.
This past Tuesday I voted in my first presidential election. Of course I was eligible twice before so don't tell my social studies teacher. I
read about folks who stood in line for twelve hours waiting to vote but I personally had no issues. I found the voting location around 10am and it seemed appropriately busy: There were people
voting but no lines. I came in and looked confused until an elderly lady gave me a paper to bubble in. The voting booth was more like a fold out voting table at a very awkward height and in the end
my back ached. It feels better to vote in person and have a back ache after. Its more like I've accomplished something.
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