Comments for Tech Space

Comment on Java code to test if a string is a valid java identifier. by Guest

Guest — Mon, 19 Mar 2012 21:51:00 +0000

This code fails for any unicode letter that don’t encode to single bytes.
To fix it, just use arg.toCharArray() and a char rather than a byte.

This should return ‘is valid’:
$ java IdentifierTest Фрэнк
Identifier “Фрэнк” is not valid

Comment on Searching for a String in Environmental Variables in Powershell by Bartek Bielawski

Bartek Bielawski — Wed, 29 Jun 2011 04:19:00 +0000

To avoid disappointmens in future:

1. Select-String is not grep. means: do not filter objects using it as you would filter command results in *nix shells.
2. Contains is for array operations, not for searching the string.
1,2,3,4 -contains 3
3. Regex compare for strings is done with -match operator.
That reduces all hard work to:
gv | ? { $_.Value -match ‘Users’ }
4. Simple pattern (‘*’, ‘?’ and ‘[]‘) compare is done with -like operator.
gv | ? { $_.Value -like ‘*[u-v]se?s*’ }

BTW: get-help where-object -examples would probably get you there before I wrote my comment. Help i PS is really greate resources on how to use it… To see all articles about operators you can do get-help operators. about_operators contains basic info that could also save you few dissapointments.
Good luck!

Comment on Searching for a String in Environmental Variables in Powershell by Jim Burger

Jim Burger — Wed, 29 Jun 2011 02:22:00 +0000

The thing here is that you have to remember that powershell is more of a programming language than a scripting lanugage. I.E Get-* will output typed objects, not string values. The upshot is that we can actually do some really complicated filtering… there is more to these objects than just their string data that you see output on the screen.
For instance… type:

Get-Member -InputObject gv[0]

..this will show all the members on the object type that gv outputs

Note that the Value property is System.Object not System.String … this is why select-string doesn’t work.

So…the ‘downside’ to powershell is you need to think like a .NET programmer.

To answer you’re q, to do what you want without hitting the filesystem, you need to drill into the string representation of the Value property. I did it using powershells where clause. (there are probably better ways – Im no PS guru). In long form.

Get-Variable | Where-Object { $_.Value -ne $null } | Where-Object { $_.Value.ToString().Contains(“Users”) }

Short form

gv | ? { $_.Value -ne $null } | ? {$_.Value.ToString().Contains(“Users”) }

Now I consider myself a PS newbie – so there is probably a less verbose, neater way to do this. But htis is it from first principles AFAIK.

Hope that Helps

Jim Burger

Comment on How to Leave a Linked In Group by Filtersweep

Filtersweep — Fri, 10 Jun 2011 13:31:00 +0000

It works, but is about as byzantine as possible. They even have the leave group button “greyed out” to discourage me from clicking on it.

Comment on Boxing of an Integer and conservation of space in Java by JP@ classpath in Java

JP@ classpath in Java — Mon, 06 Jun 2011 06:23:00 +0000

beware of auto boxing gotcha in Java 5 .

How HashMap in Java gets values

Comment on Java code to test if a string is a valid java identifier. by JP@ classpath in Java

JP@ classpath in Java — Mon, 06 Jun 2011 06:22:00 +0000

great post, here is good link about Why String is immutable in Java , you might find it interesting.

Comment on Linking a static library to Java using JNI by JP@ classpath in Java

JP@ classpath in Java — Mon, 06 Jun 2011 06:20:00 +0000

Thanks for sharing information.

Javin
Hashtable vs HashMap in java

Comment on Importing an ftp blogger blog into WordPress 2.7 by Stephen Tucker

Stephen Tucker — Wed, 03 Feb 2010 03:11:11 +0000

Great idea. Now that Blogger is deprecating ftp, I’m in the process of switching my stuff over to WordPress.
.-= Stephen Tucker´s last blog ..Eviction Notice =-.

Comment on The democratization of the news #cnnfail #IranElection by Josh

Josh — Mon, 15 Jun 2009 05:32:37 +0000

You know, this is all really insane…the election results smell real fishy…but I’m not gonna come out and say there was foul play…there has been major problems with elections all over that area of the world…so it wouldn’t be a huge surprise to me to find out that elections weren’t pure

Comment on The democratization of the news #cnnfail #IranElection by not to mention for safety reason

not to mention for safety reason — Sun, 14 Jun 2009 22:56:18 +0000

Unfortunately media is not doing a good job in covering what is happening in Iran. One reason is that Ahmadinejad’s government is blocking all types of communication. I think in this case media such as BBC should take the individual’s who is taking video of brutal behavior of Ahmadinejad’s military. You can find hundreds of these video in you tube and face book. Here are some links:

http://www.youtube.com/watch?v=xlu-qx8ohL8&eurl=http%3A%2F%2Fwww.facebook.com%2Fhome.php%3F&feature=player_embedded

http://www.youtube.com/watch?v=Osq4WTU822Y&eurl=http%3A%2F%2Fwww.facebook.com%2Fhome.php%3F&feature=player_embedded