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• How to do motion tracking of a object using video

  - by Niroshan

  Could someone direct me to a tutorial or guide me how to track motion of a object moving with 6 DOF. I am planing to use a video stream of a moving toy car. I want to calculate displacement and rotation angle of the toy car. I came across some research papers but couldn't find any libraries to the job. Is there a way to do this using OpenCV or Matlab or some other freely available software? Thank you

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• I Get the error message while write data in file --Cannot access the disposable object .Object name

  - by kunal rai

  This was the code: public static void SaveFile(Stream stream, string fileName = "") { using (IsolatedStorageFile file = IsolatedStorageFile.GetUserStoreForApplication()) { IsolatedStorageFileStream fs = file.CreateFile(fileName); var filesize = stream.Length; var getContent = new byte[(int)filesize]; stream.Read(getContent, 0, (int)filesize); fs.Write(getContent, 0, (int)filesize); fs.Close(); } }

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• gae error:AttributeError: 'NoneType' object has no attribute 'user_is_member'

  - by zjm1126

  class Thread(db.Model): members = db.StringListProperty() def user_is_member(self, user): return str(user) in self.members and thread = Thread.get(db.Key.from_path('Thread', int(id))) is_member = thread.user_is_member(user) but the error is : Traceback (most recent call last): File "D:\Program Files\Google\google_appengine\google\appengine\ext\webapp\__init__.py", line 511, in __call__ handler.get(*groups) File "D:\Program Files\Google\google_appengine\google\appengine\ext\webapp\util.py", line 62, in check_login handler_method(self, *args) File "D:\zjm_code\forum_blog_gae\main.py", line 222, in get is_member = thread.user_is_member(user) AttributeError: 'NoneType' object has no attribute 'user_is_member' why ? thanks

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• Coldfusion - taking a Serialized String and converting it to a Structure

  - by nobosh

  I have the following serialized string from a nested sortable list: ul[0][id]=main1&ul[0][children][0][id]=child2&ul[0][children][0][class]=&ul[1][id]=main3&ul[2][id]=main4&ul[3][id]=main5 I want to be able to record this in the database, and think I need a structure to do this. What's the best way to turn this into a structure, so I can sort it in the database, and easily render the list on the page in the future. Thanks,B

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• convert following string into array using explode()

  - by Deepali

  HI, I have a string: NEW ALPINESTAR?S SMX PLUS WHITE MOTORCYCLE BOOTS! 44/9.5$349.95 Time Left 1h 2m NEW AGV BLADE FLAT MATTE WHITE LARGE/LG HELMET$75.53Time Left 1h 2m I want result in array like this: Productname Price time NEW ALPINESTAR?S SMX PLUS WHITE MOTORCYCLE BOOTS! 44/9.5 $349.95 Time Left 1h 2m

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• Anonymous object properties by string?

  - by ropstah

  How can I instantiate an anonymous object while passing the propertynames and values as string? new With { .SomeProperty = "Value" } new With { ".SomeProperty" = "Value" } //something like this? :)

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• Convert byte to boolean string in HyperLinkField.DataNavigateUrlFormatString

  - by abatishchev

  I have a asp:GridView with a HyperLinkField. It's DataNavigateUrlFormatString property is set to View.aspx?id={0}&isTechnical={1} Select command of appropriate SqlDataSource returns columns of type INT and BYTE (from SQL Server 2008). So displayed string becomes something like View.aspx?id=1&isTechnical=1. But I want to display isTechnical=true|False, i.e. Convert.ToBoolean(row["isTechnical"]).ToString().ToLowerInvariant(). How to implement such conversion in page markup?

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• What is a typical algorithm for finding a string within a string?

  - by Courtney85

  I recently had an interview question that went something like this: Given a large string (haystack), find a substring (needle)? I was a little stumped to come up with a decent solution. What is the best way to approach this that doesn't have a poor time complexity?

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• javascript instanceof get type from string name

  - by dcp

  Let's say I have this (assume the name variable is "receiver"): if (!(receiver instanceof com.HTMLReceiver)) { throw new com.IllegalArgumentException( name + " is not an instance of com.HTMLReceiver."); } I'd like to factor this code out into a common method so I could call it like this: Helper.checkInstance(receiver, "com.HTMLReceiver"); But I don't know of a way to convert the com.HTMLReceiver from a string to its actual type so I can use instanceof on it. Is there a way?

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• Python XMPP library reusing socket-like object

  - by sttwister

  I'm looking for a Python XMPP library that is able to reuse an already existing socket-like object (more specifically, a Bluetooth socket) for communicating, instead of connecting to a server. Is there any nice library that can accomplish this?

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• Insert hex string value to sql server binary field is appending extra 0

  - by rotary_engine

  Have a binary field and want to insert into this from a hex string: insert into binaryTable(binaryField) values(convert(varbinary(max), 0x0)) however when I run select the value is return with an extra 0 as 0x00 This extra 0 is causing a problem in another application, I dont want it. Interesting, is if I do a select on an existing value and it returns say 0x55 then inserting this same value using the above query will return a select of 0x055. How to stop the extra 0 being added?

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• How to Compare a Time String with DateTime.Now

  - by lolalola

  I have time from DB: string user_time = "17:10:03"; //Hours:minutes:seconds DateTime time_now = DateTime.Now; How do I compare the time? How make same like this: if(time_now > user_time) { //Do something } else { //Do something }

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• How to relink existing shared library with extra object file

  - by awy

  I have existing Linux shared object file (shared library) which has been stripped. I want to produce a new version of the library with some additional functions included. I had hoped that something like the following would work, but does not: ld -o newlib.so newfuncs.o --whole-archive existinglib.so I do not have the source to the existing library. I could get it but getting a full build environment with the necessary dependencies in place would be a lot of effort for what seems like a simple problem.

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• Adding an object to another module's globals in python

  - by noam

  I know this is very evil, but is it possible to add an object to another module's globals, something like: #module dog.py import cat cat.globals.addVar('name','mittens') and #module cat.py print name #mittens

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• convert 48 hex string with perl to bytes

  - by ron

  I have a hex string(lenght 48 chars) i want to convert to raw bytes with the pack function in order to put in in win32 vector of bytes. could someone help how i can do this with perl ?

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• How do I return the first string variable that isn't null or emtpy

  - by RandomBen

  If I have 5 String variables and between 0 and 5 of them are null or empty is there an easy/short way of returning the first one that is not null or empty? I am using .NET 3.5

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• Using RegEx to Identify parts of a Database Connection String

  - by David_Jarrett

  I'm trying to get to grips with regular expressions: I have a database connection string and I'd like to use a regular expression to identify specific Keys and Values within it. For example server=foo;database=bar;uid=foo;pwd=bar I'd like something to return "database=bar;" using the 'database' key to identify it, ideally it would be case insensitive. I can do this using normal code, but I think that this is exactly the sort of thing for which regular expressions were designed.

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• How do I reference xml nodes in AS3 whose names are keywords, like <object>x</object> or <name>x</na

  - by Guillaume Riesen

  I'm trying to parse some xml in AS3, but the nodes I'm trying to call up are named keywords like 'name' and 'object'. Can I escape these words somehow?

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• using json object data in jquery select

  - by Ratna

  {"names": [ {"patientName": "Ratna"}, {"patientName": "raju" }, {"patientName": "krishna"}, {"patientName": "kishore"}, {"patientName": "Kishore1"}, {"patientName": "mahesh"} ]} this is the JSON object i'm getting from Ajax call so now i want to add all patientName values to select box through jquery can any one tell me how to accomplish this ?? here i'm using $.ajax() function for ajax call thanks in advance

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• search a string in a file as ignoring the lines beginning with #

  - by ephieste

  I want to find a string such as "qwertty=" in a file with "awk" or "grep" but I don't want to see the lines with #. Please see the example grep -ni "qwertty" /aaa/bbb 798:# * qwertty - enable/disable 1222:#qwertty=1 1223:qwertty=2 1224:#qwertty=3 I want to find the line 1223. What should be the search query for this purpose?

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• C# / Visual Studio - Object is null unless I have a Breakpoint

  - by user576611

  Hi Everyone, I'm specifically using the Google Contacts API at the moment, but this could be true of other scinarios as well. I have the following code: Contact newContact = new Contact(); When I let the code run without any breakpoints, I get a NullReferenceException on all of the properties of this object. However, if I put a breakpoint just after this line, I can see all of the properties have been initialises and the rest of my code executes fine. Any idea's would be greatly appreciated

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• Get previous object in selectors chain

  - by Idsa

  I have the following jQuery calls chain: $(someSelector).nextUntil(".specialClass").addClass(classBasedSomeSelectorObject) I need to addClass that's value is based on the object which was returned by someSelector. Is there any way to implement it?

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• geting fileds and data types of all memebers of a Object

  - by akshay

  i have a method as follows. test(Object obj){ } now within this method i want to get all fileds along with the datatypes of those fileds. How can i do that??

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• Split string by HTML entities?

  - by user366124

  My string contain a lot of HTML entities, like this &#x22;Hello&nbsp;&lt;everybody&gt;&nbsp;there&#x22; And I want to split it by HTML entities into this : Hello everybody there Can anybody suggest me a way to do this please? May be using Regex?

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• Encode and Decode a string in c#

  - by Jibu P C

  Hii, I had a requirement of encode a string provided to a unreadable format and also have to decode after certain action performed. I have tried 'Base64' encoding. But this is not a secure way. I need some other solutions. Give some help regarding the above context.

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