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• When would JavaScript == make more sense than ===?

  - by bryantsai

  As 359494 indicates they are basically identical except '===' also ensures type equality and hence '==' might perform type conversion. In Douglas Crockford's JavaScript: The Good Parts, it is advised to always avoid '=='. However, I'm wondering what the original thought of designing two set of equality operators was. Have you seen any situation that using '==' actually is more suitable than using '==='?

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• to overcome type error?

  - by kaushik

  i have a file of this format: 3.334 1 2.345 1 1.453 1 3.343 1 and so on but in middle at times in file there are few number which are not in float format and i receive type msg when i run them performation some operation.. I want to give a condition that: if(not in float format): continue else: perform operation please tell me how to put the condtion

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• Multiple file selection for an upload control

  - by Abel Morelos

  Hi, I was trying to do something like this: http://www.element-it.com/Examples/MultiPowUpload/AdvancedHTMLinterface.html But in my search for information I found that is not possible to perform multiple file selection with simple HTML and JavaScript (and JSP in the server side). There is a way to do this without using Flash? A third party component you could recommend? Thanks.

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• Dynamically loading content (ajax) other than using page methods

  - by Vince

  I'm working on a site at the moment that loads all of its browser popups by using page methods. This approach works but it's starting to get messy. I also view page methods as ways to perform small tasks, username availability comes to mind. What other options are there besides page methods and the update panel?

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• CSS check for Chrome, IE, Firefox

  - by hankh

  I've noticed a small alignment issue in the three major browsers when rendering my web site. As such how can I perform the following pseudo-code with pure CSS? if Webkit (Safari/Chrome) { #myDIV {margin-top:-3px} } else if (Firefox) { #myDIV {margin-top:0px} } else { // IE and other browsers #myDIV {margin-top:1px} }

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• What version of mongodb was full $text query operator introduced?

  - by Marc Maxson

  Stupid question, right? But the official docs for 'text index' say: http://docs.mongodb.org/manual/core/index-text/ Text Indexes New in version 2.4. To perform queries that access the text index, use the $text query operator. Whereas if you click on the help for searching the index you created with the $text operator, it reads: http://docs.mongodb.org/manual/reference/operator/query/text/#op._S_text $text New in version 2.6. Seems to be 2.4 but still having problems wiht it.

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• Smart Background Thread Task in Ruby on Rails?

  - by elado

  I need to perform a task every 5 seconds, but only when users are using the application. As for now, I use cron that works every minute and activates a task that repeats itself every 5 seconds with sleeps between, for a minute. However, it works also when the application isn't being used. Is there a gem that will do this kind of thing?

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• Use AJAX to watch SQL database for changes.

  - by Jacob Huggart

  I have a column in my database that will be updated randomly. Whenever that column is updated I need to refresh content on my page. How can I use AJAX + jQuery to perform an action only on DB changes?

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• How can i Rollback for files/folders corresponding to the changes done?

  - by OM The Eternity

  I am using PHP and Mysql I have PHP script in which I rollback all the data in the database such data all the old value be reset to the database if update is done, and all new value gets deleted if new insert has been done. Now my goal is to perform the same process with files/folders associated with the changes done, I am not able to create an idea for doing the rollback job with the files/folders associated with the Changes.. So can anyone of u help me or direct me to get the best idea?????

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• How do you preform an IF...THEN in a SQL SELECT

  - by Eric Labashosky

  I want to be able to perform a IF...THEN in an SQL SELECT Statement. For Example; SELECT IF(Obsolete = 'N' or InStock = 'Y';1;0) as Salable, * FROM Product

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• How do you make a private member in the base class become a public member in the base class?

  - by jasonline

  Consider the following code: class Base { void f() { } }; class Derived: public Base { public: }; What can you change in the derived class, such that you can perform the following: Derived d; d.f(); If the member is declared as public in the base class, adding a using declaration for Base::f in the derived class public section would've fix the problem. But if it is declared as private in the base class, this doesn't seem to work.

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• What are the default access rights for a process started with ShellExecuteEx?

  - by Heinrich Ulbricht

  I need to perform certain operation on a process started with ShellExecuteEx like waiting for it, duplicating handles, querying and setting information etc. Now I am wondering if I can do all these things on the hProcess member which is returned in the SHELLEXECUTEINFO structure I pass. Does anybody know this? Do I have rights like PROCESS_DUP_HANDLE, SYNCHRONIZE, PROCESS_SET_INFORMATION, PROCESS_QUERY_INFORMATION and so on by default?

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• Align 2 sets of 2D point clouds

  - by user108088

  From what I gather, there are two major methods to perform alignment on point clouds, Iterative Closest Point (ICP) and Particle Filtering. What are the advantages of each method? And can someone point me some good tutorials. For what I am currently doing, I think ICP would be easier, I can't seem to find any simple reference implementations online for 2d point sets. Has anyone seen (psuedo)code for ICP with details on the transformation step? Thanks in advance.

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• xcode All-in-one layout: keyboard shortcut to switch between project and debug page?

  - by zadam

  Hi, When you configure xcode to use the All-in-one layout, a toggle appears to allow you to switch between project and debug 'mode' (the IDE calls these pages). Is there a keyboard shortcut to perform the toggle? Thanks, Adam.

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• Show contents of the windows clipboard

  - by PsiX

  How can I see what the Windows clipboard currently contains without using the paste operation? I don't want the "pasted-to" application to perform any actions on the clipboard (e.g. formatting text, converting). Is there a tool which shows the clipboard's objects and their format (CF_BITMAP, CF_TEXT, etc.) and content (in simple bytes e.g.)?

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• SOA, unobtrusive JavaScript

  - by csetzkorn

  Hi, Let us say I have a restful web service which can deal with DTOs in json format to perform a CRUD operation. Let us also say I use jquery in an unobtrusive way to serialise my form at the frontend using: JSON.stringify What can I do to ensure that everything works even if JavaScript is switched off? Thanks. Best wishes, Christian

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• Set a ModelState to an ActionResult in ASP.Net MVC

  - by Marco

  Hi, In a View, I've created a <form> that posts some data to another Controller, which is different from that one that redirected me to the View. In this second controller, i perform some data validations and then, if errors are found, I need to redirect the user again to the source View but with the edited ModelState (so that i can show the validation errors). Any tips?

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• how to check some assembly is present in client and register that if not.

  - by Jimmy

  hi there, what i wana know is that how can i use assembly that is register in GAC in my C# application. Detail: What i wana achieved is that 1) Check ABC assembly that is register in my client machine or not from my windows application 2) If not then register that assemble in GAC of client from my windows application 3) And use this assembly and perform some functions Remember that that ABC assemble is my assembly having some of my function.

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• Gaussian smoothing in MatLab

  - by qpr92

  For an m x n array of elements with some noisy images, I want to perform Gaussian smoothing. How do you do that in MatLab? I've read the math involves smoothing everything with a kernel at a certain scale but have no idea how to do this in MatLab. Im pretty new to this...

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• Best way to parse Java in Java

  - by Jeeyoung Kim

  As the title says, I want to parse some Java source code in Java. I'm pretty sure there are other java libraries that already perform this, but I couldn't find any.

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• Plug Textbox to Taskbar (or Titlebar window) with C#

  - by qWolf

  I'm coding a application using C# to embed textbox to Taskbar as below picture: (Taskbar) https://docs.google.com/leaf?id=0B-E8VK5m5ETqZTI2ZjBlODUtOGI0MC00ZDRhLThjNzItMmE2MTA5NjZlODE5&hl=en (Title) https://docs.google.com/leaf?id=0B-E8VK5m5ETqZWE0NzM2MjktZTc5NS00MjdmLThkMmUtMTZjODA3MWUyZTRm&hl=en -- I downloaded Window API code pack and view some example but I still don't know how to perform my scenario. Anyone help me for a solution or article (I searched Google but didn't find any article). Thanks a lot !

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• help troubleshooting deadlocks in sql server database

  - by Makach

  I've got two database servers, (1) production (2) test on the production database I get frequent deadlocks and I'm trying to find out what is causing it. I take a backup of the database in production and restore it in test and when I perform the exact same scenario that yields deadlocks on the production server I am unable to reproduce in test. any ideas/tips/hints would be much appreciated.

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• java multiple operations depending on the type of the object passed

  - by mixm

  assuming i create a method which is passed an object, and that method would perform an action depending on the object passed. how should i identify the object? i thought of using the class name to identify the object, but may be impractical since i could easily change the class name of objects, and generate headaches during future development. am i right?

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• Reading HTTP headers from JAX-WS Web Service

  - by Anonimo

  Hi all, I currently have a JAX-WS Web Service that receives some credentials in the HTTP header. These are used for BASIC authentication. There is a filter that performs authentication by reading the HTTP headers and checking against the database. Still, I need the username from within the Web Service in order to perform other service logic related stuff. Is there a way of accessing the HTTP headers from within the Web Service? Thanks.

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• check if a line is valid or not in Java

  - by Adnan

  I would like to perform checking on the following: VALID LINES; /**/ some code */ some code /** dsfsdkf sd**/ NOT VALID LINES; /**/ //some code */ /***/ //somecode So basically if there is a line of code outside a comment it is valid, otherwise not. What would be the best way to tackle this kind of validation? Note: For */ I assume that the /* has been opened some lines before.

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