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• What is Class Descriptor?

  - by learner

  What is Class Descriptor? Is it a Class object of a particular class?

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• Please provide scenarios/conditions those fail during deserialization when a class & serialized obje

  - by learner

  Please provide scenarios/conditions those fail during deserialization when a class & serialized object have same serialVersionUID? I'm looking scenarios like following 1) If a data type of an instance variable is changed then deserialization will fail Could you please provide all such scenarios. I couldn't find such scenarios list anywhere in the internet. Thanks

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• Fatal error: Cannot use string offset as an array

  - by learner

  Array ( [0] = Array ( [auth_id] = 1 [auth_section] = Client Data Base [auth_parent_id] = 0 [auth_admin] = 1 [sub] = Array ( [0] = Array ( [auth_id] = 2 [auth_section] = Client Contact [auth_parent_id] = 1 [auth_admin] = 1 ) ) ) [1] => Array ( [auth_id] => 6 [auth_section] => All Back Grounds [auth_parent_id] => 0 [auth_admin] => ,4 [sub] => Array ( [0] => Array ( [auth_id] => 7 [auth_section] => Edit Custom [auth_parent_id] => 6 [auth_admin] => 1 ) ) ) [2] => Array ( [auth_id] => 20 [auth_section] => Order Mail [auth_parent_id] => 0 [auth_admin] => 1 [sub] => ) } When I process the sub inner array it shows this error how can I avoid that :)

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• How to create thumbnail images with white 3px border using PHP?

  - by learner

  How to create thumbnail images with white 3px border using PHP? any body have the scripts please help me :(

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• O(log n) algorithm for merging lists and computing rank?

  - by Eternal Learner

  Given two sorted lists, each containing n real numbers, is there a O(log?n) time algorithm to compute the element of rank i (where i coresponds to index in increasing order) in the union of the two lists, assuming the elements of the two lists are distinct? I can think of using a Merge procedure to merge the 2 lists and then find the A[i] element in constant time. But the Merge would take O(n) time. How do we solve it in O(log n) time?

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• How to find the length of a parameter pack ?

  - by Eternal Learner

  Hi All, Suppose I have a variadic template function like template<typename... Args> unsigned length(Args... args); How do I find the length of the parameter list ?

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• Problem with a recursive function to find sqrt of a number

  - by Eternal Learner

  Below is a simple program which computes sqrt of a number using Bisection. While executing this with a call like sqrtr(4,1,4) in goes into an endless recursion . I am unable to figure out why this is happening. Below is the function : double sqrtr(double N , double Low ,double High ) { double value = 0.00; double mid = (Low + High + 1)/2; if(Low == High) { value = High; } else if (N < mid * mid ) { value = sqrtr(N,Low,mid-1) ; } else if(N >= mid * mid) { value = sqrtr(N,mid,High) ; } return value; }

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• How to get x y coordinates of an image in php

  - by learner

  How to get x y coordinates of an image in php? I have an image $image = images/abc.png; how to get the coordinates of the image using php.

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• Query to find all bars that sell three different beers at the same price

  - by Eternal Learner

  Query to find "All bars that sell three different beers at the same price?" My Tables are Sells(bar,beer,price) - bar - foreign Key.. Bars(name,addr) - name primary key. I thought of something like this but that dosent seem to work ... Select A.bar As bar , B.bar as bar From Sells AS A, Sells AS B Where A.bar = B.bar and A.beer <> B.beer Group By(A.beer) Having Count(Distinct A.beer) >= 2 Is this the correct SQL query ?

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• How to find a value in array and remove it by using PHP array functions

  - by learner

  How to find a value exist in an array and how to remove it. If any php builtin array functions for doing this. After removing I need the sequential index order. any body knows please help me.

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• To create a large file consisting of strings and numbers in c or c++

  - by Eternal Learner

  Hi All, I need to create a larger file, which would be filled by strings and numbers of a certain length. Eg File content would be like : Dougan | 15 | Sapient Patric | 25 | Patni. IGHIGH | 10 | IHIUDWHKJDBHKJ I need an outline as to how I can approach this in either c or c++.. Kindly let me know if more information is needed.

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• Thumbnail video player in PHP

  - by php learner

  I have to display video files as in thumbnail form. How can I do that. any body can help me.

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• Practise Questions for Templates,Functors,CallBack functions in c++?

  - by Eternal Learner

  Hi, I have been reading templates,functors,callback function for the past week and have referred some good books and articles. I however feel that, unless I can get good practice - programming in templates and use functors-callbacks there is no way I can really understand all the concepts or fluently use them while coding. Could anyone suggest some articles or books or websites where , there is a definition of the problem and also a solution to the same. I could just write code for the problem and check later on if my solution is good enough.. I am also aware that some of our stack-overflow members are experts in templates and callback functions. It would be great if they could design a problem and also post a solution , where a lot of template beginners like me could benefit.

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• how to do special character validation in PHP

  - by php learner

  I have lot of textarea fields to add comments and quotes. How can I validate these fields. I checked null validation other than null validation what validation I have to do?

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• can we use smarty with zend framework?

  - by learner

  Any body know can we use smarty with zend framework. If yes what is the advantage of using like that?

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• How to resize an image using PHP?

  - by learner

  How to resize an image in PHP?

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• How to remove my corrupted mysql from wamp and connect separatly installed mysql to wamp?

  - by learner

  How to remove my corrupted mysql from wamp and connect separatly installed mysql to wamp? If any body know please help me.

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• Is it a problem if i query again and again to SQL Server 2005 and 2000?

  - by learner

  Window app i am constructing is for very low end machines (Celeron with max 128 RAM). From the following two approaches which one is the best (I don't want that application becomes memory hog for low end machines):- Approach One:- Query the database Select GUID from Table1 where DateTime <= @givendate which is returning me more than 300 thousands records (but only one field i.e. GUID - 300 thousands GUIDs). Now running a loop to achieve next process of this software based on GUID. Second Approach:- Query the database Select Top 1 GUID from Table1 where DateTime <= @givendate with top 1 again and again until all 300 thousands records done. It will return me only one GUID at a time, and I can do my next step of operation. What do you suggest which approach will use the less Memory Resources?? (Speed / performance is not the issue here).

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• How to give border to a created image using PHP

  - by learner

  How to give border to a created image using PHP

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• how to rotate image in php?

  - by learner

  how can we rotate an image using php

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• Changing set_timezone does not always take effect

  - by LearneR

  I have two table table-1 id date-time ----------------------- 1 2012-12-13 15:20:13 table-2 id date-time ----------------------- 1 2012-12-13 15:20:13 Now i am selecting the record with mysql set_timezone function Case-1 SET time_zone='+00:00'; SELECT `date-time` FROM `table-1`; // 2012-12-13 09:50:13 Case-2 SET time_zone='+00:00'; SELECT `date-time` FROM `table-2`; // 2012-12-13 15:20:13 ---Not converting to specified timezone In case-1 it's giving converted date-time, but not in Case-2. What would be the issue?

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• How to include an image inside another image in PHP?

  - by learner

  How to include an image inside another image in PHP? I want to do it like in twitterbackgrounds.com personalized backgroud. there is one main image and we can upload four personal images after that it will show as watermark of the main image.

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• Can we change <input type="file"> style?

  - by learner.php

  I tried to change the HTML form, input type file. Here is my code: HTML, form id = form <input class="upload_file" type="file" id="file" name="file" /> .CSS I tried both: .upload_button{ background: url('../images/upload_btn_bg.png') no-repeat; width: 200px; height: 40px; } #form input[type=file]{ background: url('../images/upload_btn_bg.png') no-repeat; width: 200px; height: 40px; } None of both of those methods works. I did see from some website, like facebook, youtube, google or twitter, they have different style. Wonder how they do it.

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• How to get img inside a particular div using JQuery

  - by learner

  I have to get all the image tags ids inside a particular div. How can I get that using JQuery?

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• How to avoid black background when rotating an image 45 degree using PHP?

  - by learner

  Hi I have to flip a thumpnail image before merge it with another jpeg file. but when I rotate 45 degree using php. It shows a black background. how can I avoid that. any body can help me.

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