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• When should I use $ (and can it always be replaced with parentheses)?

  - by J Cooper

  From what I'm reading, $ is described as "applies a function to its arguments." However, it doesn't seem to work quite like (apply ...) in Lisp, because it's a binary operator, so really the only thing it looks like it does is help to avoid parentheses sometimes, like foo $ bar quux instead of foo (bar quux). Am I understanding it right? Is the latter form considered "bad style"?

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• Power error handling inside of sql function

  - by user172062

  I have a power function call inside of a sql function. What is the correct way to handle overflow and underflow conditions since I cannot use a Try Catch inside of a function. I am also trying to avoid modifying the ARITHABORT, ANSI_WARNINGS, and ARITHIGNORE settings in the calling code. GO CREATE FUNCTION TestPow() RETURNS DECIMAL(30, 14) AS BEGIN DECLARE @result FLOAT SET @result = POWER(10.0, 300) RETURN @result END GO SELECT dbo.TestPow()

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• Gmail - Settings for mailing spam filters

  - by PHP-Prabhu

  can anybody help me, i need to restrict/avoid the mails from "[email protected]". because which sends always a spam mails to my id. please advice...

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• How to prevent duplicate records being inserted with SqlBulkCopy?

  - by Pandiya Chendur

  I am inserting a datatable via sqlbulkcopy to a sql server Table.... Consider that if am inserting the same datatable next time the same set of rows are added... How to avoid duplicates in such scenario? Any suggestion....

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• Clean checkout from TFS 2008

  - by Luis Medel

  Hi all, I want to pass a project to a colleague without SCC bindings to avoid accidental changes in my repository. Is it possible to do a clean checkout from a TFS 2008 repo? I'm going crazy finding such an option in VS2008. Thanks in advance.

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• ASP .NET 4.0 How do I Redirect/Override the default CDN path for ScriptManager when EnableCDN=true

  - by plattnum

  I am using the EnableCdn=true in my ScriptManager so that WebResource.axd and ScriptResource.axd are overridden with static links to JS libraries at the MS CDN service as follows: <asp:ScriptManager ID="ScriptManager1" runat="server" EnableCdn="true" /> How do I override the CDN URLs or service so that I can retrieve the scripts over HTTPS from the MS CDN service rather than HTTP to avoid the browser mixed mode message? or for that matter a different or my own CDN service entirely.

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• Disable resizing tables in mozilla in design mode

  - by Anatoliy

  Is there a way to remove the attribute '_moz_resizing="true"' added by Firefox from to avoid giving user the possibility to resize table in design mode (when contentEditable=true).

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• opening transaction validation in vb.net

  - by Mark

  Can anyone help me on how can I validate transaction example: transaction = mySqlConn.BeginTransaction(IsolationLevel.ReadCommitted) If there's still an opened transaction, then the code above will ignore.. How do I know if there was a transaction not yet committed before opening new transaction to avoid Nested Transaction?

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• IOS4 UISplitViewController in Portrait Orientation with RootViewController showing like Landscape

  - by magic-c0d3r

  In IOS 3.2 I was able to display my UISplitViewController side by side like in landscape mode. In IOS 4.2 the RootViewController (MasterView) is not showing up in portrait mode. Does anyone know if we need to display the rootviewcontroll in a popover? Can we display it side by side like how it is in landscape mode? I want to avoid having to click on a button to show the masterview (when in portrait mode)

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• clearTimeout not working in javascript autocomplete script

  - by Travis

  I am using the following code as part of an autocomplete script to avoid hammering the server with every keystroke: var that = this; textInput.bind("keyup", function() { clearTimeout(that.timer); that.timer = setTimeout (that.doStuff(), 2000); }); Unfortunately, this does not clear the old timers. They still all execute. Does anyone know what I'm missing? Thanks!

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• Why has anybody ever used COBOL?

  - by sarzl

  I know: You and me hate COBOL. I took a look at a lot of code examples and it didn't take me long to know why everybody tries to avoid it. So I really have no idea: Why was COBOL ever used? I mean: Hey - there was Fortran before it, and Fortran looks like a jesus-language compared to COBOL. This isn't argumentative but historical as I'm young and didn't even know about COBOL before 4 months.

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• Updating a single file in a compressed tar

  - by Phil

  Given a compressed archive file such as application.tar.gz which has a folder application/x/y/z.jar among others, I'd like to be able to take my most recent version of z.jar and update/refresh the archive with it. Is there a way to do this other than something like the following? tar -xzf application.tar.gz cp ~/myupdatedfolder/z.jar application/x/y tar -czf application application.tar.gz I understand the -u switch in tar may be of use to avoid having to untar the whole thing, but I'm unsure how to use it exactly.

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• Outlook - check email address type

  - by Chris Gunner

  I am trying to make a macro in Outlook that will scan the To: list for a certain text string, and spit out a message if all but one (or two, etc) addresses have it. Is there a simple way to do this? Essentially, I am trying to write something that'll avoid being able to send a restricted message to a bunch of people with the string 'xyz' in the address, if one or more do not have it. AutoComplete makes this difficult, without checking through one-by-one.

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• Can a single argument constructor with a default value be subject to implicit type conversion

  - by Richard

  I understand the use of the explicit keyword to avoid the implicit type conversions that can occur with a single argument constructor, or with a constructor that has multiple arguments of which only the first does not have a default value. However, I was wondering, does a single argument constructor with a default value behave the same as one without a default value when it comes to implicit conversions?

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• Is assert evil?

  - by dehmann

  The Go language creators write: Go doesn't provide assertions. (...) Programmers use them as a crutch to avoid thinking about proper error handling and reporting. What is your opinion about this?

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• Inexpensive ways to add seek to a filetype object

  - by becomingGuru

  PdfFileReader reads the content from a pdf file to create an object. I am querying the pdf from a cdn via urllib.urlopen(), this provides me a file like object, which has no seek. PdfFileReader, however uses seek. What is the simple way to create a PdfFileReader object from a pdf downloaded via url. Now, what can I do to avoid writing to disk and reading it again via file(). Thanks in advance.

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• How can I tell JWebUnit to contact specific Selenium servers

  - by Peter Tillemans

  We want to run selenium backed jwebunit tests from our hudson server. We have a couple of selenium rc servers already on our network which I'd like to reuse. However how can I configure jwebunit to use those servers as I would like to avoid installing a slenium rc server on the hudson. Building is already work enough without starting/stopping firefoxes.

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• convert any language into PHP sourcecode

  - by dreftymac

  Question: Is there any such thing as a programming language (other than an esoteric language such as BrainF@#$, or the languages PHP or VB) that you can "compile" into non-obfuscated PHP source code? Rationale: Swip wants to generate ordinary PHP code because it is so ubiquitous for the types of projects swip wants to do. Unfortunately swip would like to actually avoid writing PHP -- strange but true! Swip is crazy enough to want to generate PHP source code without having to type any PHP into Swip's editor.

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• javascript conflict on accesing DOM

  - by justjoe

  i read this statement from a book i read The Document Object Model or DOM is really not a part of JavaScript but a separate entity existing outside it. Although you can use JavaScript to manipulate DOM objects, other scripting languages may equally well access them too. what is the best way to avoid conflict between javascript and other client-siede scripting language when we have to deal with XMLHTTPRequest object

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• How can i access to smartcard from ASP.NET site?

  - by Grassino87

  Hi, i need to comunicate with a smartcard from an ASP.NET site. I've create a dll(using Winscard.dll and MCSCM.dll that is the SCM Micro Reader's dll) that work with the cardreader on windows but i'm not able to use it with ASP.NET. The project will run only on IE and i must avoid Javascript. Thank you for the help.

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• jquery delegate table rows selector

  - by Jackob

  I have a table which may contains other inner tables (it's not possible to edit generated markup). I want to create a delegate function for row mouseenter and mouseleave which only triggers for the associated main table rows (and not inner tables rows), as following: $("#tableid").delegate("tr", "mouseenter mouseleave", function(e) { //do stuff here }); But with this selector it selects also the inner table rows, so how can I modify the selector to avoid selecting inner table rows?

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• IP address numbers in MySQL subquery

  - by Iain Collins

  I have a problem with a subquery involving IPV4 addresses stored in MySQL (MySQL 5.0). The IP addresses are stored in two tables, both in network number format - e.g. the format output by MySQL's INET_ATON(). The first table ('events') contains lots of rows with IP addresses associated with them, the second table ('network_providers') contains a list of provider information for given netblocks. events table (~4,000,000 rows): event_id (int) event_name (varchar) ip_address (unsigned 4 byte int) network_providers table (~60,000 rows): ip_start (unsigned 4 byte int) ip_end (unsigned 4 byte int) provider_name (varchar) Simplified for the purposes of the problem I'm having, the goal is to create an export along the lines of: event_id,event_name,ip_address,provider_name If do a query along the lines of either of the following, I get the result I expect: SELECT provider_name FROM network_providers WHERE INET_ATON('192.168.0.1') >= network_providers.ip_start ORDER BY network_providers.ip_start DESC LIMIT 1 SELECT provider_name FROM network_providers WHERE 3232235521 >= network_providers.ip_start ORDER BY network_providers.ip_start DESC LIMIT 1 That is to say, it returns the correct provider_name for whatever IP I look up (of course I'm not really using 192.168.0.1 in my queries). However, when performing this same query as a subquery, in the following manner, it doesn't yield the result I would expect: SELECT event.id, event.event_name, (SELECT provider_name FROM network_providers WHERE event.ip_address >= network_providers.ip_start ORDER BY network_providers.ip_start DESC LIMIT 1) as provider FROM events Instead the a different (incorrect) value for network_provider is returned - over 90% (but curiously not all) values returned in the provider column contain the wrong provider information for that IP. Using event.ip_address in a subquery just to echo out the value confirms it contains the value I'd expect and that the subquery can parse it. Replacing event.ip_address with an actual network number also works, just using it dynamically in the subquery in this manner that doesn't work for me. I suspect the problem is there is something fundamental and important about subqueries in MySQL that I don't get. I've worked with IP addresses like this in MySQL quite a bit before, but haven't previously done lookups for them using a subquery. The question: I'd really appreciate an example of how I could get the output I want, and if someone here knows, some enlightenment as to why what I'm doing doesn't work so I can avoid making this mistake again. Notes: The actual real-world usage I'm trying to do is considerably more complicated (involving joining two or three tables). This is a simplified version, to avoid overly complicating the question. Additionally, I know I'm not using a between on ip_start & ip_end - that's intentional (the DB's can be out of date, and such cases the owner in the DB is almost always in the next specified range and 'best guess' is fine in this context) however I'm grateful for any suggestions for improvement that relate to the question. Efficiency is always nice, but in this case absolutely not essential - any help appreciated.

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• CSS3 new features...whats the point?

  - by benhowdle89

  I've been reading a lot of ways recently of how to avoid having to use Photoshop for things like gradients and shadows on buttons, when you can use CSS3 Box Shadow for such features. Now this is great, but obviously legacy browsers and most IE browsers don't yet implement CSS3 features, so my question is, why save yourself extra work in Photoshop when you can use CSS3 but then HAVE to use Photoshop for other browsers to see the desired effects? Isn't that just extra work?

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• Is there any ideas about create HTML DOM object pool?

  - by blueion

  In RIA, especially very complicate such as google WAVE. For browser's DOM object recycle system is not smart, I think put all DOM object into an object pool maybe a good idea to avoid create too much useless DOM node. Can anyone give me some advice?

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• Drive a POS printer via USB in c#

  - by JDibble

  Any ideas how i can best drive a USB POS printer from c#. POS printers are usually serial, TCP/IP or USB based. I know how to accomplish serial and TCP/IP but have no idea about communications through USB in C#. I know that there is a layer available from Microsoft called POS.NET, but I want to try and avoid using this. Any ideas or any C# libraries that people can recomend would be really appreciated. Thanks

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