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• identifier token keyword antlr parser

  - by batman_for

  How to handle the case where the token 'for' is used in two different situations in the language to parse? Such as statement and as a "parameter" as the following example: echo for print example for i in {0..10..2} do echo "Welcome $i times" done Output: for print example Welcome 0 times Welcome 2 times Welcome 4 times Welcome 6 times Welcome 8 times Welcome 10 times Thanks.

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• QValidator for hex input

  - by Evan Teran

  I have a Qt widget which should only accept a hex string as input. It is very simple to restrict the input characters to [0-9A-Fa-f], but I would like to have it display with a delimiter between "bytes" so for example if the delimiter is a space, and the user types 0011223344 I would like the line edit to display 00 11 22 33 44 Now if the user presses the backspace key 3 times, then I want it to display 00 11 22 3. I almost have what i want, so far there is only one subtle bug involving using the delete key to remove a delimiter. Does anyone have a better way to implement this validator? Here's my code so far: class HexStringValidator : public QValidator { public: HexStringValidator(QObject * parent) : QValidator(parent) {} public: virtual void fixup(QString &input) const { QString temp; int index = 0; // every 2 digits insert a space if they didn't explicitly type one Q_FOREACH(QChar ch, input) { if(std::isxdigit(ch.toAscii())) { if(index != 0 && (index & 1) == 0) { temp += ' '; } temp += ch.toUpper(); ++index; } } input = temp; } virtual State validate(QString &input, int &pos) const { if(!input.isEmpty()) { // TODO: can we detect if the char which was JUST deleted // (if any was deleted) was a space? and special case this? // as to not have the bug in this case? const int char_pos = pos - input.left(pos).count(' '); int chars = 0; fixup(input); pos = 0; while(chars != char_pos) { if(input[pos] != ' ') { ++chars; } ++pos; } // favor the right side of a space if(input[pos] == ' ') { ++pos; } } return QValidator::Acceptable; } }; For now this code is functional enough, but I'd love to have it work 100% as expected. Obviously the ideal would be the just separate the display of the hex string from the actual characters stored in the QLineEdit's internal buffer but I have no idea where to start with that and I imagine is a non-trivial undertaking. In essence, I would like to have a Validator which conforms to this regex: "[0-9A-Fa-f]( [0-9A-Fa-f])*" but I don't want the user to ever have to type a space as delimiter. Likewise, when editing what they types, the spaces should be managed implicitly.

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• ASP.NET UpdateProgress template does not disapper when panel in UpdatePanel has display set to none

  - by Greg Balajewicz

  I am using very simple code where I have a update panel with some panels inside and a submit button. On submit, i hide one of the panels using this code: panel.Style.Add("display", "none"); I am also using a UpdateProgress which works great in all but this case. When i set the display to none using this code, the UpdateProgress template does not disappear! remove the line, all is well .... No idea why...

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• why does maven3 give up supporting application $version declaration?

  - by Bariscan

  As you see from the title, I want to ask that the case of in maven3 there is no support for $version in pom.xml anymore. Do we have to really write a constant every time in each project in every pom.xml and related configuration files again and again? How can we avoid doing this? How can we use a versioning method like $version? Many thanks in advance, Baris

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• When calling managed code called from unmanaged code, is it possible to inspect the exception object

  - by Danra

  Working with COM interop, I can call a managed function from within unmanaged code. But, this only gives me the HRESULT for the exception, in case a managed exception is thrown. Is there anyway to further inspect the exception from the unmanaged code? For example, to look at the message contained in the exception object. Thanks!

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• What's the best SOAP client library for Python, and where is the documentation for it?

  - by blackrobot

  I've never used SOAP before and I'm sort of new to Python. I'm doing this to get myself acquainted with both technologies. I've installed SOAPlib and I've tried to read their Client documentation, but I don't understand it too well. Is there anything else I can look into which is more suited for being a SOAP Client library for Python? Edit: Just in case it helps, I'm using Python 2.6.

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• jQuery Validate Ignore elements with style

  - by gmcalab

  I am using jQuery validate for client side validation and I want to ignore any element that has the style="display: none" $("#myform").validate({ ignore: "?" }); What would my selector be for that in the above case?

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• Optimum size of transaction in Postgres?

  - by Joe

  I'm running a process that does a lot of updates ( 100,000) to a table. I have the choice between putting all the updates in a single transaction or committing transactions every 1000 or so. Ignore for the moment the case where a transaction fails and is aborted. I'm interested in the best size of transaction for memory and speed efficiency.

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• Switch statements: do you need the last break? (Javascript mainly)

  - by Jon Raasch

  When using a switch() statement, you add break; in between separate case: declarations. But what about the last one? Normally I just leave it off, but I'm wondering if this has some performance implication I'm not thinking about? I've been wondering about this for a while and don't see it asked elsewhere on Stack-O, but sorry if I missed it. I'm mainly asking this question regarding Javascript, although I'm guessing the answer will apply to all switch() statements.

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• Capture output from browser call using Selenium

  - by gagneet

  I need to create a use case (using Selenium) in which I send HTTP calls with a Cookie through the browser and capture the return value in a text file. What do I need to do this, I have run this using CURL in the command line, but we are encountering issues with the same, and hence wish to verify using a real UI browser.

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• How to assign class property as display data member in datagridview

  - by KoolKabin

  hi guys, I am trying to display my data in datagridview. I created a class with different property and used its list as the datasource. it worked fine. but I got confused how to do that in case we have nested class. My Classes are as follows: class Category property UIN as integer property Name as string end class class item property uin as integer property name as string property mycategory as category end class my data list as follows: dim myDataList as list(of Item) = new List(of Item) myDataList.Add(new Item(1,"item1",new category(1,"cat1"))) myDataList.Add(new Item(2,"item2",new category(1,"cat1"))) myDataList.Add(new Item(3,"item3",new category(1,"cat1"))) myDataList.Add(new Item(4,"item4",new category(2,"cat2"))) myDataList.Add(new Item(5,"item5",new category(2,"cat2"))) myDataList.Add(new Item(6,"item6",new category(2,"cat2"))) Now I binded the datagridview control like: DGVMain.AutoGenerateColumns = False DGVMain.ColumnCount = 3 DGVMain.Columns(0).DataPropertyName = "UIN" DGVMain.Columns(0).HeaderText = "ID" DGVMain.Columns(1).DataPropertyName = "Name" DGVMain.Columns(1).HeaderText = "Name" DGVMain.Columns(2).DataPropertyName = "" **'here i want my category name** DGVMain.Columns(2).HeaderText = "category" DGVMain.datasource = myDataList DGVMain.refresh() I have tried using mycategory.name but it didn't worked. What can be done to get expected result? Is there any better idea other than this to accomplish the same task? Edited My question as per comment: I have checked the link given by u. It was nice n very usefull. Since the code was in c# i tried to convert it in vb. Everything went good but failed at a point of case sensitive and next one is that i had my nested class name itemcategory and my property name was category. there it arouse the problem. it didn't searched for category but it searched for itemcategory. so confused on it. My Code as follows: Private Sub DGVMain_CellFormatting(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellFormattingEventArgs) Handles DGVMain.CellFormatting Dim DGVMain As DataGridView = CType(sender, DataGridView) e.Value = EvaluateValue(DGVMain.Rows(e.RowIndex).DataBoundItem, DGVMain.Columns(e.ColumnIndex).DataPropertyName) End Sub Private Function EvaluateValue(ByRef myObj As Object, ByRef myProp As String) As String Dim Ret As String = "" Dim Props As System.Reflection.PropertyInfo() Dim PropA As System.Reflection.PropertyInfo Dim ObjA As Object If myProp.Contains(".") Then myProp = myProp.Substring(0, myProp.IndexOf(".")) Props = myObj.GetType().GetProperties() For Each PropA In Props ObjA = PropA.GetValue(myObj, New Object() {}) If ObjA.GetType().Name = myProp Then Ret = EvaluateValue(ObjA, myProp.Substring(myProp.IndexOf(".") + 1)) Exit For End If Next Else PropA = myObj.GetType().GetProperty(myProp) Ret = PropA.GetValue(myObj, New Object() {}).ToString() End If Return Ret End Function

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• How can I get System.Type from "System.Drawing.Color" string

  - by jonny

  I have an xml stored property of some control <Prop Name="ForeColor" Type="System.Drawing.Color" Value="-16777216" /> I want to convert it back as others System.Type type = System.Type.GetType(propertyTypeString); object propertyObj = TypeDescriptor.GetConverter(type).ConvertFromString(propertyValueString); System.Type.GetType("System.Drawing.Color") returns null. The question is how one can correctly get color type from string (it will be better not to do a special case just for Color properties) Update from time to time this xml will be edited by hand

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• What tools to use to build large java commercial projects ?

  - by openCage

  There are several tools to build java projects: ant mvn ivy buildr ... From my experience Ant is great for small projects and projects with special build requirements. Mvn is great for large but typical projects without too much special requirements. It also seams better for open source than for commercial projects. What would you recommend in case of large, enterprise, commercial projects ? What do you currently use and what would you rather use and why ?

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• Non-Standard widget size for Android

  - by heorling

  I have a use-case for a vertical 1x4 home screen widget on android. The supported size is 4x1 ie horizontal. Does anyone know if the vertical version can be implemented? I realize changing screen orientation would scrunch the widget together, which I'm fine with. Even better would be if there was an equivalent to "overflow hidden" in css. Has anyone come across a way to do this?

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• Drawing shapes with wxWidgets

  - by Pieter

  I want to learn how to draw shapes with wxWidgets. Where do I start? In case there are multiple ways, I prefer ease of use over cross-platform compatibility. I'm a Windows user.

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• How to abort shutdown in Windows (XP|Vista) programatically?

  - by Piskvor

  I want to be able to detect and abort OS shutdown from my application, preferably by using the Windows API. I know that it is possible to do this manually using the command shutdown -a In the worst case, I could ShellExecute this, but I was wondering if there was a better way. Also, how do I find out programatically that the OS is about to shut down, via the Win32 API?

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• Ruby on rails authlogic config (get rid of capitalization check)

  - by bandhunt

  The authlogic rails gem is doing a LOWER in the sql query. SELECT * FROM `users` WHERE (LOWER(`users`.email) = '[email protected]') LIMIT 1 I want to get rid of the LOWER part since it seems to be slowing down the query by quite a bit. I'd prefer to just lower the case in the code since this query seems to be expensive. I'm not sure where to change this behavior in authlogic. Thanks!

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• Flash Builder 4: mx:Button baseColor doesnt exist

  - by Mikepote

  Just wanted to add this here in case you are migrating your project from Flash Builder 4 Beta to Flash Builder 4 release. I used a lot of mx:Buttons with the baseColor property, which now seems to be called chromeColor.

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• Re-Include Module

  - by Nino55

  Hello, I need some like this: module One def test; puts 'Test One'; end end module Two def test; puts 'Test Two'; end end class Foo include One include Two include One end In this case I need as a result 'Test One' but obviously it returns 'Test Two'. I need a clean simple way for re-include my module. Any suggestion? Thanks!

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• Standard Practice for Continuous Integration of Maven Multi-module projects

  - by James Kingsbery

  I checked around, and couldn't find a good answer to this: We have a multi-module Maven project which we want to continuously integrate. We thought of two strategies for handling this: Have our continuous integration server (TeamCity, in this case, but I've used others before and they seem to have the same issue) point to the aggregator POM file, and just build everything Have our continuous integration server point at each individual module Is there a standard, preferred practice for this? I've checked Stack Overflow, Google, the Continuous Integration book, and did not find anything, but maybe I missed it.

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• Does VS2010 does not install SQL Server during installation

  - by Greg

  Hi, Just confirming -does VS2010 does not install SQL Server during installation? I'm assuming no. This being the case I therefore need to download a copy of SQL Express 2005 or something to develop against on my windows XP home PC? Is this correct? Or would the Dev edition of SQL Server 2005 run/install on Windows XP Home? thanks

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• paypal subcription: Can I make the first payment different ammount?

  - by DucDigital

  I am currently working on Paypal Payment Pro and need to have a special recursive payment. In this case. My client want to make the first month payment is 0, and in following months, the payment will be 5$ each. Is there any way or document about this? I personally don't know what it's called so I can't google around. Thank you very much.

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• How to sort a list in Scala by two fields?

  - by Twistleton

  how to sort a list in Scala by two fields, in this example I will sort by lastName and firstName? case class Row(var firstName: String, var lastName: String, var city: String) var rows = List(new Row("Oscar", "Wilde", "London"), new Row("Otto", "Swift", "Berlin"), new Row("Carl", "Swift", "Paris"), new Row("Hans", "Swift", "Dublin"), new Row("Hugo", "Swift", "Sligo")) rows.sortBy(_.lastName) I try things like this rows.sortBy(_.lastName + _.firstName) but it doesn't work. So I be curious for a good and easy solution. Thanks in advance! Pongo

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• How can I trim certain characters from a string in sql?

  - by Matt

  I would like to trim all special characters from a string in SQL. I've seen a bunch of people who use substring methods to remove a certain amount of characters, but in this case the length on each side of the string is unknown. Anyone know how to do this? Thanks, Matt

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• Google Books API - How do I separate Book from Book Edition?

  - by RadiantHex

  Hi, I'm using Google Book Search API to add missings bits and pieces to my database. Problem is that The API gives me back a list of book editions, and not reference to the original book itself. The data I'm trying to get is this: Original title: The Hobbit Original year of publication: 1937 Can anyone help? Just in case anyone asks: I'm developing this in Python.

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