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  • IS NULL vs = NULL in where clause + SQL Server

    - by Nev_Rahd
    Hello How to check a value IS NULL [or] = @param (where @param is null) Ex: Select column1 from Table1 where column2 IS NULL => works fine If I want to replace comparing value (IS NULL) with @param. How can this be done Select column1 from Table1 where column2 = @param => this works fine until @param got some value in it and if is null never finds a record. How can this achieve?

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  • Icon fonts vs images

    - by Miss A
    My manager tells me not to use icon fonts on our websites, as it is another http request plus the extra kBs to download. Also because I would have to use content before for the font (I can't change the html), he prefers background images so it works in IE7. Personally I love the little things, so nice and crisp and resizeable! I get it if we only use a couple of icons on a website but if I would use, say 5 icons on a site - what do you guys think? Is it worth using an icon font or is he right thinking that it is not? I am just a sucker for anything new and exciting, and this year it is the retina display.

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  • multi threading python/ruby vs java?

    - by fayer
    i wonder if the multi threading in python/ruby is equivalent to the one in java? by that i mean, is it as efficient? cause if you want to create a chat application that use comet technology i know that you have to use multi threading. does this mean that i can use python or ruby for that or is it better with java? thanks

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  • J2me - Arrays vs vector ?

    - by Galaxy
    if we have to implementations of string split for j2me, one returns vector and the other returns array , in terms of performance on hand held devices which one is the best choice ?

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  • Security issues in accepting passwords vs auto generating the password

    - by Vivekanand Poojari
    Hi, I am developing a console application. This application generates a self signed certificate and installs it in the current machine's certificate store. The steps invlolved are :- Generate a certificate Create a pfx file Install the pfx file For these steps i would need a password for protecting the private key and the pfx file. However these passwords are used only during the execution of the exe. Should I auto generate a password using some random number generation algorithm or accept the password as input from the user? What are the security issues involved in both the scenarios ? Thanks Vivekanand

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  • Selenium tests: html vs code?

    - by gustavogb
    Is it better to write/record selenium tests in html format and run them directly in the server with "-htmlSuite" or to write the tests in java/C#/... and run them in the server using selenium-rc? What is the recommended solution?

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  • mobile: html5 vs xhtml

    - by Sean
    I am building a mobile app (hybrid mobile web app but with a native shell) with most users on the iphone (some on the blackberry) and am wondering if it should be written in html5 or xhtml? Any insight would be great.

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  • Core Data Errors vs Exceptions Part 3

    - by John Gallagher
    My question is similar to this one. Background I'm creating a large number of objects in a core data store using NSOperations to speed things up. I've followed all the Core Data multithreading rules - I've got a single persistent store coordinator and a managed object context per thread that on save is merging back to the main managed object context. The Problem When the number of threads running at once is more than 1, I get the exception logged on save of my core data store: NSExceptionHandler has recorded the following exception: NSInternalInconsistencyException -- optimistic locking failure What I've Tried My code that creates new entities is quite complex - it makes entities that have relationships with other entities that could be being created in a separate thread. If I replace my object creation routine with some very simple code just making non-related entries, everything works perfectly. Initially, as well as the exceptions, I was getting a save error saying core data couldn't save due to the merge failing. I read the docs and realised I needed a merge policy on the Managed Object Context I was saving to. I set this up and as this question states, the save error goes away, but the exception remains. My Question Do I need to worry about these exceptions? If I do need to get rid of the exceptions, any ideas on how I do it?

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  • Best choice for off-site backup: dd vs tar

    - by plok
    I have two 1TB single-partition hard disks configured as RAID1, of which I would like to make an off-site backup on a third disk, which I am still to buy. The idea is to store the backup at a relative's house, considerably far away from my place, in the hope that all the information will be safe in the case of a global thermonuclear apocalypse. Of course, this backup would be well encrypted. What I still have to decide is whether I am going to simply tar the entire partition or, instead, use dd to create an image of the disks. Is there any non-trivial difference between these two approaches that I could be overlooking? This off-site backup would be updated no more than two or three times a year, in the best of the cases, so performance should not be a factor to be pondered at all. What, and why, would you use if you were me? dd, tar, or a third option?

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  • Project hosting vs. my own SVN

    - by BigG
    I'm working on different projects with some small teams (2-3 people for each). Those projects are about some scientific stuff, most (probably all) the code will be released under GPL after the publication of some results and we don't want to spend money for this. My first question is: should i keep my local SVN server or you know some good service for this? Both of them have some disadvantages and services like xp-dev.com looks pretty interesting but should i trust them? [i'll get only the free plan] Online services give you some tools for project management, what do you think about them?

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  • speed of map() vs. list comprehension vs. numpy vectorized function in python

    - by mcstrother
    I have a function foo(i) that takes an integer and takes a significant amount of time to execute. Will there be a significant performance difference between any of the following ways of initializing 'a': a = [foo(i) for i in xrange(100)] , a = map(foo, range(100)) , and vfoo = numpy.vectorize(foo) vfoo(range(100)) ? (I don't care whether the output is a list or a numpy array). Is there some other better way of doing this? Thanks.

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  • How to Refresh combobox in Visual Basic

    - by phenomenon09
    When a button is clicked, it populates a combo box with all the databases you have created. Another button creates a new database. How do I refresh my combobox to add the newly added database? Here's how I populate my combo box at the start: rs.Open "show databases", conn While Not rs.EOF If rs!Database <> "information_schema" Then Combo1.AddItem rs!Database End If rs.MoveNext Wend cmdOK.Enabled = False cmdCancel.Enabled = False frmLogin.Height = 3300 rs.Close

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  • Using TDD: "top down" vs. "bottom up"

    - by Christian Mustica
    Since I'm a TDD newbie, I'm currently developing a tiny C# console application in order to practice (because practice makes perfect, right?). I started by making a simple sketchup of how the application could be organized (class-wise) and started developing all domain classes that I could identify, one by one (test first, of course). In the end, the classes have to be integrated together in order to make the application runnable, i.e. placing necessary code in the Main method which calls the necessary logic. However, I don't see how I can do this last integration step in a "test first" manner. I suppose I wouldn't be having these issues had I used a "top down" approach. The question is: how would I do that? Should I have started by testing the Main() method? If anyone could give me some pointers, it will be much appreciated.

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  • Comparison question string vs int

    - by Mike
    Can someone explain to me why these comparisons work they way the do. I had a bug in one of my scripts that took me a little bit to work through. I was using read-host and typing a number. It was storing it as a string. Write-Host "(`'2`' -gt 9 ) = " ('2' -gt 9 ) Write-Host "(2 -gt 9 ) = " (2 -gt 9 ) Write-Host "(`'2`' -gt 10 ) = " ('2' -gt 10 ) If you are comparing a string to an Int does it use the Ascii value? If so why does the first one show $false, it should be $true. Then how is it when you chage it to an int of 10 it because $true.

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  • .NET: bool vs enum as a method parameter

    - by Julien Lebosquain
    Each time I'm writing a method that takes a boolean parameter representing an option, I find myself thinking: "should I replace this by an enum which would make reading the method calls much easier?". Consider the following with an object that takes a parameter telling whether the implementation should use its thread-safe version or not (I'm not asking here if this way of doing this is good design or not, only the use of the boolean): public void CreateSomeObject(bool makeThreadSafe); CreateSomeObject(true); When the call is next to the declaration the purpose of the parameter seems of course obvious. When it's in some third party library you barely know, it's harder to immediately see what the code does, compared to: public enum CreationOptions { None, MakeThreadSafe } public void CreateSomeObject(CreationOptions options); CreateSomeObject(CreationOptions.MakeThreadSafe); which describes the intent far better. Things get worse when there's two boolean parameters representing options. See what happened to ObjectContext.SaveChanges(bool) between Framework 3.5 and 4.0. It has been obsoleted because a second option has been introduced and the whole thing has been converted to an enum. While it seems obvious to use an enumeration when there's three elements or more, what's your opinion and experiences about using an enum instead a boolean in these specific cases?

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  • PHP Speed - Many Echos vs Building a String

    - by Chris
    Wondering if anyone knows if either of these methods would produce an output faster: Method 1 for ($i=1;$i<99999;$i++) { echo $i, '<br>'; } or Method 2 for ($i=1;$i<99999;$i++) { $string .= $i . '<br>'; } echo $string; Thanks for any input you have.

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  • turn on bluetooth in pocket pc VS-c++

    - by baash05
    I'm attempting to turn on the bluetooth network of a Janam (wince5.0) I understand it involves ndisuio, but I'm not sure how to invoke it. I assume it will involve the use of a standard DLL or api call, how can I find out what that call would be?

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  • Eclipse Memory usuage in Windows Vs Linux..

    - by Nareshreddy Kola
    Can someone please give me the details about the Eclipse memory usage in Windows XP and Linux? I heard Eclipse consumes less memory in Linux compared to Windows? Is it true? What ever the OS is, IDE will look for some amount memory so how will it vary with OS? Related Question: Eclipse memory use

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  • LaTeX vs DocBook

    - by yfel
    I have only little knowledge about LaTeX, basic formatting, basic math fomulae etc.. I found that LaTeX is hard to configure to my own flavor. Recently, I've heard about Docbook, which is also a typesetting mechanism, but much easier since it uses XML. So, if my main job using LaTeX/Docbook is writing a simple document (not a class book) with some mathematics, and I want easy configuration, and a highly constomizable application, which one is better, and is there any good book on Docbook?

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  • Advanced Model Binding vs 2010

    - by user281180
    Can I have an example of advanced model binding using ajaxpost? I have two classes Person and Test as follows: public class person{ public ArrayList Name = new ArrayList(); public Test []test {get;set;} } public class Test { public int ID{get;set;} public int mark{get;set;} } My Controller could be [HttpPost] public EmptyResult CaseTest(Person person) { return new EmptyResult(); } How do I post the values from the view?

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  • PHP: SUBMIT Type vs IMAGE Type

    - by sebb
    I have noticed that when using a SUBMIT type its name attribute gets passed via POST , while an IMAGE type button do not have this data sent, can any one clear this up for me? In both instances the NAME attribute is present at HTML level, but only the SUMBIT type has the NAME sent via POST....is this right?

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