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• Need alternative field names for these reserved words

  - by MattSlay

  “type” and “class” are likely reserved or problematic words in C# and/or Ruby, two languages I may use to program against my new database schema in the future. So, in order to avoid potential conflicts with those languages, I’m looking for alternative names for these field names in my tables. In this case, it is from my Machines table, where I have: “class” field (values would be something like “manual” or “computerized”) and “type” field (values would be “lathe” or “mill”) I could call the fields “machineclass” and “machinetype”, but that is inconsistent with naming scheme in the rest of my schema (meaning, I do not re-use the table name in the field… For instance, I use Machine.name, not Machine.machinename) Any thought on this madness?

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• Web Setup Project - Getting the Current Machine Name

  - by Shane Kenney

  I've got a web setup project with a custom screen in it that asks for a machine name. Is there anyway to prepopulate this field with the current machines name? For the case that I need it for just including "Localhost" does not meet my requirements. "Environment.MachineName" will return the machine name within a code block which would be fine if I was needing it in a custom action. But it seems custom actions don't excecute until after you go through the installation wizard... So I cant actually use it. Anyway let me know what you think.

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• How do I launch a subprocess in C# with an argv? (Or convert agrv to a legal arg string)

  - by lucas

  I have a C# command-line application that I need to run in windows and under mono in unix. At some point I want to launch a subprocess given a set of arbitrary paramaters passed in via the command line. For instance: Usage: mycommandline [-args] -- [arbitrary program] Unfortunately, System.Diagnostics.ProcessStartInfo only takes a string for args. This is a problem for commands such as: ./my_commandline myarg1 myarg2 -- grep "a b c" foo.txt In this case argv looks like : argv = {"my_commandline", "myarg1", "myarg2", "--", "grep", "a b c", "foo.txt"} Note that the quotes around "a b c" are stripped by the shell so if I simply concatenate the arguments in order to create the arg string for ProcessStartInfo I get: args = "my_commandline myarg1 myarg2 -- grep a b c foo.txt" Which is not what I want. Is there a simple way to either pass an argv to subprocess launch under C# OR to convert an arbitrary argv into a string which is legal for windows and linux shell? Any help would be greatly appreciated.

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• Creating an SQL Compact file: Template or script?

  - by David Veeneman

  I am writing an application that writes to SQL Compact files that have a specific schema, and I am now implementing the New File use case. The simplest approach seems to be to use a Template pattern: first, create a template file that lives in the application directory. Then, when the user selects New File, the template is copied to the name and destination specified by the user in a New File dialog. The alternative is a scripted approach: Use the same New File dialog, but dispense with the template file. Instead, create an empty SQL Compact file using the name/destination specified by the user, and then execute a T-SQL script on it from managed code. At this point, I am leaning toward the Template approach, because it is simpler. Is there any reason I should not use that approach? Thanks for your help.

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• Actionscript 3 : XML cached in local testing

  - by Boun

  Hi, My question is about XML loading. I need to avoid xml caching. On a web server, the technique is adding a random param to reload each time the XML file. But on local testing (in Flash CS4 IDE, CTRL + Enter), the following lines are not possible : var my_date : Date; path = "toto.xml?time="+my_date.getSeconds()+my_date.getMilliseconds(); Is there any trick to bypass this issue ? I've read on different forum about the "delete" method, we delete the xml object and then recreate one new. In my case, I put : myXML = null; myXML = new XML ( loadedData ); But it doesn't work at all. I spent many hours on that problem, if anyone has a good solution... Thank you.

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• Using a bookmarklet to track a package

  - by user307558

  I'm trying to write a bookmarklet that tracks a package in the mail. First it checks to see if the tracking page is open, if not it opens it in a new tab, and then sets the value of the form to the tracking number. Finally, it submits the form. What I'm so far unable to do is set the value of the form in the case where the bookmarklet opens up a new tab. Here's what I have: javascript: (function(){ var trackingNumber = "/*tracking number*/"; var a = document.forms.trackingForm; if ('http://fedex.com/Tracking' == document.location) { trackingForm.trackNbrs.value = trackingNumber; document.forms.trackingForm.submit(); } else { window.open('http://fedex.com/Tracking'); this.window.onload = function(){ //This seems to be the problem trackingForm.trackNbrs.value = trackingNumber; onload(document.forms.trackingForm.submit()); } } })(); Any ideas?

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• How to determine which class has called a function

  - by dannyc

  Hi, I am working on a Flex Front End at the moment, and have been using the Parsley framework for passing messages/events around. I was wondering if there is a simple way for a function (in this case, an event's constructor) to obtain a reference to the object which called it? This is to ensure that a certain event that I am defining can only be dispatched by one specified class. My thinking is to check the caller of the constructor somehow, and throw an error if it is not of the correct type. I am open to suggestions of alternative approaches here, but I would ideally like to stick to using the Parsley 'MessageHandler' approach if at all possible. Thanks for reading guys..

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• Usability - How to edit favorites?

  - by Florian

  Hi, I'd like to get some opinions about about usability in the following case: Target group people from 30-50, low to middle internet affinity. App: I have a website with login. Visitors can save interesseting pages in their fav-box for fast access. Here the actual question: How to edit this favorites? Is it better to give the visitors direct access to drag/dropn and delete their favs or is it better to have an edit button so they have to activate the edit mode before? The fav-link would look like this | link text to click | icon-drag | icon-delete | thx for input TC

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• Is this code well-defined?

  - by Nawaz

  This code is taken from a discussion going on here. someInstance.Fun(++k).Gun(10).Sun(k).Tun(); Is this code well-defined? Is ++k Fun() evaluated before k in Sun()? What if k is user-defined type, not built-in type? And in what ways the above function calls order is different from this: eat(++k);drink(10);sleep(k); As far as I can say, in both situations, there exists a sequence point after each function call. If so, then why can't the first case is also well-defined like the second one? Section 1.9.17 of the C++ ISO standard says this about sequence points and function evaluation: When calling a function (whether or not the function is inline), there is a sequence point after the evaluation of all function arguments (if any) which takes place before execution of any expressions or statements in the function body. There is also a sequence point after the copying of a returned value and before the execution of any expressions outside the function.

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• Getting differences between WVGA800 and WVGA854 in Android Emulator

  - by Droidy

  So far I just have one XML layout file, and one drawable directory, drawable-hdpi. I first want to target the high density screens. I added a bunch of imagebuttons to a relativelayout and everything looks perfect in the WVGA800 emulator. The problem arises when I view it in the WVGA854 emulator. Not only do the imagebuttons not position the same, but the images are blurry. I used dip for the layout margins on the imagebuttons even though it shouldn't matter in this case because WVGA800 and 854 are both high density. What is the problem? Why would it look totally different on emulators that have the same density and almost have the same exact screen dimensions? Thanks!

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• FuzzyFinder in vim - prevent duplicate filenames in Windows

  - by Edan Maor

  I'm using the FuzzyFinder plugin for vim (specifically with gvim on Windows). It works great, except for one problem: it has many duplicate filenames. As far as I can tell, this happens because it's case sensitive to filenames, whereas Windows is not. So when I open a file from someplace that lists the directory as "C:\", and another place that lists it as "c:\", I get two different filenames. Does anyone know of a way that I can fix this? Thanks!

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• How to override j_security_check in glassfish?

  - by Alex B

  I'm currently using FORM based authentication in glassfish v2.1 to log users in and it works fine. I want to switch to ProgrammaticLogin and I want to be able to get the initially requested URL (i.e. before redirecting to login page) and use it in my programmatic login code so that the user is redirected back to the requested page after authentication. I've seen the source code for j_security_check - in my case that's FormAuthenticator (catalina codebase) and it saves the initial request in a SavedRequest object in the session but that session is a StandardSession rather than HttpSession so there's no direct way to access it. Or should I change the authentication mechanism from FORM to something else? Thanks!

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• Variable length Blob in hibernate?

  - by Seth

  I have a byte[] member in one of my persistable classes. Normally, I'd just annotate it with @Lob and @Column(name="foo", size=). In this particular case, however, the length of the byte[] can vary a lot (from ~10KB all the way up to ~100MB). If I annotate the column with a size of 128MB, I feel like I'll be wasting a lot of space for the small and mid-sized objects. Is there a variable length blob type I can use? Will hibernate take care of all of this for me behind the scenes without wasting space? What's the best way to go about this? Thanks!

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• In registration form adding date dialogbox how can apply validation in system date in dialog ends

  - by narasimha

  hi i am implementing registration form adding date field then click icon to display date dialog window then limit date validation in system date below date only how can implement the validation protected Dialog onCreateDialog(int id) { Calendar c = Calendar.getInstance(); int cyear = c.get(Calendar.YEAR); int cmonth = c.get(Calendar.MONTH); int cday = c.get(Calendar.DAY_OF_MONTH); switch (id) { case DATE_DIALOG_ID: return new DatePickerDialog(this, mDateSetListener, cyear, cmonth, cday); } return null; } private DatePickerDialog.OnDateSetListener mDateSetListener = new DatePickerDialog.OnDateSetListener() { public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) { String date_selected = String.valueOf(monthOfYear+1)+" /"+String.valueOf(dayOfMonth)+" /"+String.valueOf(year); EditText birthday=(EditText) findViewById(R.id.EditTextBirthday); birthday.setText(date_selected); } }; public void onClick(View v) { if(v == b1) showDialog(DATE_DIALOG_ID); } } ** showing in system date in below dates only how can implemented some solution in running year to below years are display not incrementing above years this condition are appliying validations how can implemented ?

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• Android bluetooth socket error

  - by ashwini

  I am using backport bluetooth api on android 1.6. I am using Google Bluetooth Chat sample app for testing. The app works fine in normal scenarios. In a scenario, when I try to connect to paired device which is in off state, I get following error. 01-04 09:00:11.629: ERROR/BluetoothEventLoop.cpp(84): onGetRemoteServiceChannelResult: D-Bus error: org.bluez.Error.ConnectionAttemptFailed (Host is down) 01-04 09:00:11.729: DEBUG/dalvikvm(128): GC freed 4535 objects / 256008 bytes in 296ms 01-04 09:00:21.880: ERROR/bluetooth_RfcommSocket.cpp(1433): connect error: Host is down (112) But it sets the state as connected. The app is unable to catch the exception. Why does it happen? Or is it the case with backport api? Any help is appreciated as I am struggling a lot to get things run fine.

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• How to return 'null' instead of 'undefined' from select element

  - by MrW

  How can I return null instead of a 'undefined' from a select element. Basically I have 4 selects at the moment, but only the first one is populated with data at this point, but I want to grab the value from all of them when working with them. <select class="changeValue" id="drpOne"></select> <option id=1>1</option> <option id=2>2</option> <option id=3>3</option> <select class="changeValue" id="drpTwo"></select> JQuery: $('.changeValue').change(function() { var data = {}; data["Id1"] = $('#drpOne:selected').attr("id"); data["Id2"] = $('#drpTwo:selected').attr("id"); In this case, drpTwo will return 'undefined'. Is there anyway to get a null instead?

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• Why do mainframe greybeards refer to DB2/zOS as "he"? [closed]

  - by Alex Nauda

  If you ask a DB2/zOS engine DBA a question about DB2's behavior, the DBA will refer to the DB2 engine as "he" much the way a sailor uses "she" to refer to his ship. For example: "Once you fill the freespace, DB2 still wants to keep those rows in cluster order in the tablespace. That's why he'll split that page in half, and you end up with lots of half-empty pages. That is, unless the cluster key of the row you've just inserted is the highest in the table, in which case he makes a new empty page, and he puts just your new row into that page. So I wouldn't have to do this REORG if you would just sort your input like I suggested." Does anyone know where this tradition comes from?

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• Why does Rake task enhancement differ between my local environment and when deploying to Heroku Cedar?

  - by John Bachir

  I have this in lib/tasks/foo.rake: Rake::Task["assets:precompile"].enhance do print ">>>>>>>> hello from precompile" end Rake::Task["assets:precompile:nondigest"].enhance do print ">>>>>>>> hello from precompile:nondigest" end When I run rake assets:precompile locally, both messages are printed. When I push to heroku, only the nondigest message is printed. However, according to the buildpack, the push is executing the exact same command as I am locally. Why does the enhancement to the base assets:precompile case not work on heroku but does work locally?

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• How do I wait until a console application is idle?

  - by Anthony Mastrean

  I have a console application that starts up, hosts a bunch of services (long-running startup), and then waits for clients to call into it. I have integration tests that start this console application and make "client" calls. How do I wait for the console application to complete its startup before making the client calls? I want to avoid doing Thread.Sleep(int) because that's dependent on the startup time (which may change) and I waste time if the startup is faster. Process.WaitForInputIdle works only on applications with a UI (and I confirmed that it does throw an exception in this case). I'm open to awkward solutions like, have the console application write a temp file when it's ready.

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• Deployment of broadband network

  - by sthustfo

  Hi all, My query is related to broadband network deployment. I have a DSL modem connection provided by my operator. Now the DSL modem has a built-in NAT and DHCP server, hence it allocates IP addresses to any client devices (laptops, PC, mobile) that connect to it. However, the DSL modem also gets a public IP address X that is provisioned by the operator. My question is Whether this IP address X provisioned by operator is an IP address that is directly on the public Internet? Is it likely (practical scenario) that my broadband operator will put in one more NAT+DHCP server and provide IP addresses to all the modems within his broadband network. In this case, the IP addresses allotted to the modem devices will not be directly on the public Internet. Thanks in advance.

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• How do you get subversion diff summary to ignore mergeinfo properties?

  - by tolomea

  I have subversion 1.6.5 client and 1.5.4 server. And I mostly only care about diffs on fully repository paths, not working copies. When diffing branches ones that have been merged already show up as identical except for the mergeinfo properties. This is a touch annoying for a human who has to then look through the changes looking for anything that might be a real change. However it's somewhat worse in out use case as we have scripts that run around checking on the merge state of various things and the mergeinfo properties cause them to highlight a lot of things as being out of sync when they aren't. Is there a way to get the diff summary to ignore the mergeinfo properties?

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• page transitions using javascript

  - by hasan

  hey, i saw this on a site a couple of days ago and i cant seem to find it again. in any case, this is what was on the site: the page opened regularly when you entered the url. upon clicking one of the links on the page, it "transitioned" to the next page (there was a color change). and the url in the address bar was changed to reflect that. eg: if the background was blue on site.com, when clicking on the about link, the background would change to green and the browser would show site.com/about. and so on. also, if the url entered was site.com/about, the bg would be green and on cliking the home page, the site would transition from green to blue and browser would show site.com im interested in finding out how this was done. searching on google got me the meta-refresh tag, but the ffect was much more complex and worked on all browsers. is there any other method out there?

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• MySQL indexes: how do they work?

  - by bob-the-destroyer

  I'm a complete newbie with MySQL indexes. I have several MyISAM tables on MySQL 5.0x having utf8 charsets and collations with 100k+ records each. The primary keys are generally integer. Many columns on each table may have duplicate values. I need to quickly count, sum, average, or otherwise perform custom calculations on any number of fields in each table or joined on any number of others. I found this page giving an overview of MySQL index usage: http://dev.mysql.com/doc/refman/5.0/en/mysql-indexes.html, but I'm still not sure I'm using indexes right. Just when I think I've made the perfect index out of a collection of fields I want to calculate against, I get the "index must be under 1000 bytes" error. Can anyone explain how to most efficiently create and use indexes to speed up queries? Caveat: upgrading Mysql is not possible in this case. Using Navicat Light for db administration, but this app isn't required.

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• Why is the destructor called when the CPython garbage collector is disabled?

  - by Frederik

  I'm trying to understand the internals of the CPython garbage collector, specifically when the destructor is called. So far, the behavior is intuitive, but the following case trips me up: Disable the GC. Create an object, then remove a reference to it. The object is destroyed and the __del__ method is called. I thought this would only happen if the garbage collector was enabled. Can someone explain why this happens? Is there a way to defer calling the destructor? import gc import unittest _destroyed = False class MyClass(object): def __del__(self): global _destroyed _destroyed = True class GarbageCollectionTest(unittest.TestCase): def testExplicitGarbageCollection(self): gc.disable() ref = MyClass() ref = None # The next test fails. # The object is automatically destroyed even with the collector turned off. self.assertFalse(_destroyed) gc.collect() self.assertTrue(_destroyed) if __name__=='__main__': unittest.main() Disclaimer: this code is not meant for production -- I've already noted that this is very implementation-specific and does not work on Jython.

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• Cloud Database Service Latency/Performance

  - by Gcoop

  Hi All, I am running a heavy traffic site and our server is beginning to get to its limits, at the moment the entire LAMP stack is on one box (not ideal). I would like to move the database onto it's own box or onto a cloud service, but from my previous experience moving the database off the same box as the webserver increases the latency of reads quite dramatically slowing down the site. Is using a cloud service for this going to overcome this problem, because as far as I can tell its essentially the same situation (as moving it onto a separate box in my control)? In which case why is there so much popularity around cloud based database services at the moment? Are cloud based database services so quick that the latency of reads is so low that its almost like having it on the same box in the same datacentre?

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