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• Javascript: Save json data as a file on the server / user's hard disk.

  - by DavidR

  I have developed an app that allows the user to fill out text fields with information. I want them to be able to press a button that will make a file with data (a really long array with info on what they typed and where it should go) so they can reload the data at a later date. I don't have a server now, and I am sending this app as a standalone html app to my friends for their use until I get hosing / mySql / etc. Is there a way that when they click on a button it will take this data (saved as an array, save_data), put it into a file, and basically begin the download process from their web-browser? And later on, what tech would I need to be looking into to save this into online user accounts?

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• some logical error in taking up character in java

  - by Himanshu Aggarwal

  This is my code... class info{ public static void main (String[]args) throws IOException{ char gen; while(true) { //problem occurs with this while System.out.print("\nENTER YOUR GENDER (M/F) : "); gen=(char)System.in.read(); if(gen=='M' || gen=='F' || gen=='m' || gen=='f'){ break; } } System.out.println("\nGENDER = "+gen); } } This is my output... ENTER YOUR GENDER (M/F) : h ENTER YOUR GENDER (M/F) : ENTER YOUR GENDER (M/F) : ENTER YOUR GENDER (M/F) : m GENDER = m Could someone please help me understand why it is asking for the gender so many times.

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• How to write my own download manager using Objective C for iOS devices

  - by Saurabh

  I am writing a download manager for iPhone using objective C. I am using ASIHTTP framework and its working great. But my problem is I am not able to download from file sharing sites like filesonic, rapidshare, hotfile etc. I want to know how can I get download (actual download) url from these sites, or at least how these sites are hiding this info (and where), so I can get that somehow... Is there any open source library or framework to help me with this? How firefox or other desktop browser get this link? Any help will be much appreciated! Update 1 : I don't want to bypass their advertising and revenue streams. Almost all file sharing companies also provide free downloads with low bandwidth, I only want to use that service. there are many download managers available now for iPhone like - "Downloads Lite". I just want to build a similar functionality.

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• Oracle (Old?) Joins - A tool/script for conversion?

  - by Grasper

  I have been porting oracle selects, and I have been running across a lot of queries like so: SELECT e.last_name, d.department_name FROM employees e, departments d WHERE e.department_id(+) = d.department_id; ...and: SELECT last_name, d.department_id FROM employees e, departments d WHERE e.department_id = d.department_id(+); Are there any guides/tutorials for converting all of the variants of the (+) syntax? What is that syntax even called (so I can scour google)? Even better.. Is there a tool/script that will do this conversion for me (Preferred Free)? An optimizer of some sort? I have around 500 of these queries to port.. When was this standard phased out? Any info is appreciated.

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• Do we need Record Level Locking when we already have Transaction for online ordering? (of concert ti

  - by Jian Lin

  For online ordering of concert seat or airline ticket, do we need Record Level Locking or is Transaction good enough? For concert ticket (say, seat Number 20B), or airline ticket (even with overbooking, the limit is 210, for example), I think the website cannot lock any record or begin transaction when showing the ticket purchase screen. But after the user clicks "Confirm Purchase", then the server should Begin a Transaction, Purchase Seat Number 20B, and try to Commit. If another user already bought Seat 20B in a previous transaction, then it is the "Commit" part that the current transaction will fail? So... we don't need Record Level Locking? Do Transactions always go serialized (one after another), so that's why we can know for sure there is no "race condition"? In what situation is Record Level Locking needed then?

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• How to get Host OS (operating system) parameter of ZIP archive in C#

  - by bao

  Look. I have ZIP archives prepared in different os'es: mac, linux, windows. In windows file names encoded in DOS CP866, mac & linux in UTF-8. I need to know (in code) in which os zip file was prepared to decode file names correctly. There is a Host OS paramterer in "Central directory structure" of zip file (look http://www.fileformat.info/format/zip/corion.htm ). How to get 0005h 1 byte Host OS parameter in C#?

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• After Port Forwarding, how to get my external IP in Java ?

  - by Frank

  I set up a static IP and did port forwarding on my notebook, and now I have a static IP address, but it's relatively static, every time I re-start the machine, I get another address, and since I have a "static" IP I can now do Paypal IPN messaging. But how can I get this static IP from my Java program ? One way I can think of is to visit : http://portforward.com/ and on that page it tells me what my external IP is, so I can extract it with Java code, is there any other way that I can do in my Java code to get this info ?

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• How to implement image map type interface for a game board in Java 6

  - by Billy

  My group project at school is to implement a style of monopoly in which students can buy courses and land on various squares and move around the board. This is not a regular square board so we were wondering if anyone had any ideas on how we would implement an image map or something like it to create many clickable regions not in a perfect square. I have attached the image of the game board. Just a way to start is needed, not lots of code or anything as we all know java pretty well. If anyone has any ideas that would be great. Image of board is here. http://imgur.com/fH5WC.png

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• Caching using hibernate

  - by Subhendu Mahanta

  I have 2 applications.First one is a web application through which we provision reference data.Second one is an ESB based application where the reference data is used.The reference data changes but not very frequently.We needed to cache the reference data.The web application( I am not the owner) used hibernate. But my ESB based application did not.We only used EHCache. When reference data is changed by the independent web application that needs to be reflected in ESB application.We implemented using message queue - that is when reference data changes web application sends a message to the message queue.Our ESB application listens to that message & clears the cache & caches the data once again.This works.But it is time intensive.How can I use Hibernate to improve the situation? Regards, Subhendu

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• Connecting Delphi to P/Invoke and .net

  - by lexdean

  The Delphi complier often uses a *.Dll when a special delivery of code info is required to the complier/editor:- example bourland.dll is the memory manager for the Delphi complier, as I remember. And their are many other *.dll's that Embarcoo keep secret that do other things. Is their anything you know that is public information on this subject .net's un managed code could be declared in a *.pas file as a decelerations but the only way to communicate it out is calling *.dll's like P/Invoke I have ilasm.exe and ildasm.exe and a decomplier into Delphi asm code now but still getting around to learn how to use them all yet. I do not have any reference material/editorials on P/invoke at all as I cannot find anything With that I will have a good concrete plan to make a good result I do not know what *.DLL's are in P/Invoke. Do you have any documentation. I do not have any reference material/editorials on ADO.net. The Dlls that are called and any referqance matrial I could use. Best regards, J Lex Dean.

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• When to use SQL Table Alias

  - by Rossini

  I curious to know how people are using table alias. The other developers where I work always use table alias, and always use the alias of a, b, c, ect. Here's an example SELECT a.TripNum, b.SegmentNum, b.StopNum, b.ArrivalTime FROM Trip a, Segment b WHERE a.TripNum = b.TripNum I disagree with them, and think table alias should be use more sparingly. I think it should be used when including the same table twice in a query, or when the table name is very long and using a shorter name in the query will make the query easier to read. I also think the alias should be a good name instead of a letter. In the above example if I felt I needed to use 1 letter table alias I would use t for the Trip table and s for the segment table.

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• How can I log into gmail in a script/program using HTTPS?

  - by master chief

  My teacher has given me as an assignment to log into gmail and then send one e-mail or read the list of unread e-mails, but I can't use IMAP/POP3/SMTP or anything that isn't HTTP or HTTPS. I've tried looking for libraries in Ruby/Java to do it but nothing really worked for me. I tried looking at the gmail source code page but I couldn't really understand what was going on. The page seems to call a post method on a link, but sniffing the packets what I saw was a GET apparently using a session generated using the info I send. So sending it "raw" didn't work either. I've no idea what to do now.

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• Servlets, long operations

  - by asrijaal

  Hi there, I'm refactoring a big piece of code atm where a long taking operation is executed in a servlet. Now sometimes I don't get a response after the operation has finished. (It has finished because it is printed into the logs) What I wish to achieve would some "fire and forget" behavior by the servlet. I would pass my params to the action and the servlet would immediately return a status (something like: the operation has started, check your logs for further info) Is this possible with servlet 2.5 spec? I think I could get such a behavior with JMS maybe any other solutions out there?

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• Want to know about the best framework available for my app

  - by vamyip

  Hello, I am trying to design a new application which basically aims at providing biometric authentication services. What I want to do is that the app will present the user with an interface where the user can get his eye scanned for authentication. The most important feature I want to incorporate is that the user need not have a webcam, the app must be able to read the eye from the display device i.e. CRT or LCD screen itself. I want info about the best framework available for this. Once successfully tested, I am planning to provide it as a webservice. Any one who will help me will get a royalty from my income.

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• which is better, creating a materialized view or a new table?

  - by Carson

  I have some demanding mysql queries that are needed to grap same up-to-date datasets from 5-7 mysql tables. I am thinking of creating a table or materialized view to gather all demanding columns from other tables, so as to increase performance. If I create that table, I may need to do extra insert / update / delete operation each time other tables updated. if I create materialized view, I am worrying if the performance can be greatly improved. Because data from other tables are changing very frequently. Most likely, the view may need to be created first everytime before selecting it. Any ideas? e.g. how to cache? other extra measures I can do?

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• DOs and DON'Ts of a technical presentation

  - by TG

  I am preparing a technical presentation for my team. Audience : Our team Topic : Introduction to a new technology So I want to know about the primary necessary things for a good technical presentation and also DOs and DON'Ts for the same. some of my concerns are, 1. Whether to have slides or not (if needed then how many of them) 2. Coding a sample during presentation or preparing it before going for the presentation 3. Maximum duration of an technical presentation What is your thoughts on technical presentations from your past experience either as a presenter or as a listener.

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• iFrames and Cookies

  - by Tom

  I have a site on A.com and an iframe on B.com which reads info from A.com. I realize that there is some problems with third party cookies, iframes and P3P - particularly in Safari [my problem] Is it possible to instead, use AJAX or a hidden iFrame to pass the cookie information from A.com to B.com which will then "recreate" another cookie with the same information on the iframe in B.com. I am trying to do this for authenication - i.e. a user is logged in on A.com and then goes to b.com and the iframe is also logged in ? I was hoping to perhaps pass the data in a hidden iframe and "recreate" the cookie in the iframe on B.com using JavaScript? Is this possible ? Security issues ? What about HTTPS?

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• How can a Delphi TPersistent object calculate its own deserialization time?

  - by mjustin

  For performance tests I need a way to measure the time needed for a form to load its definition from the DFM. All existing forms inherit a custom form class. To capture the current time, this base class needs overriden methods as "extension points": start of the deserialization process after the deserialization (can be implemented by overriding the Loaded procedure) the moment just before the execution of the OnFormCreate event So the log for TMyForm.Create(nil) could look like: - 00.000 instance created - 00.010 before deserialization - 01.823 after deserialization - 02.340 before OnFormCreate Which TObject (or TComponent) methods are best suited? Maybe there are other extension points in the form creation process, please feel free to make suggestions.

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• Standard (cross-platform) way for bit manipulation

  - by Kiril Kirov

  As are are different binary representation of the numbers (for example, take big/little endian), is this cross-platform: some_unsigned_type variable = some_number; // set n-th bit, starting from 1, // right-to-left (least significant-to most significant) variable |= ( 1 << ( n - 1 ) ); // clear the same bit: variable &= ~( 1 << ( n - 1 ) ); In other words, does the compiler always take care of the different binary representation of the unsigned numbers, or it's platform-specific? And what if variable is signed integral type (for example, int) and its value is zero positive negative? What does the Standard say about this? P.S. And, yes, I'm interesting in both - C and C++, please don't tell me they are different languages, because I know this :) I can paste real example, if needed, but the post will become too long

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• What's the proper way to use sqlite on the iPhone?

  - by Elliot Chen

  Hi, Experts: Can you please give some suggestions on sqlite using on the iPhone? Within my application, I use a sqlite DB to store all local data. Two methods can be used to retrieve those data during running time. 1, Load all the data into memory at initialization stage. (More memory used, less DB open/close operation needed) 2, Read corresponding records when necessary, free the occupied memory after using. (Good habit for memory using, but much DB open/close operations needs). I prefer to use method 2, but not sure whether too many DB opening/closing operations could affect app's efficiency. Or do you think I can 'upgrade' method 2 by opening DB when app launches and closing DB when app quits? Thanks for your suggestions very much!

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• Count the unread emails in exchange for each user

  - by Luis

  Hi, i want to count the unread emails in exchange with c# i all conected to the exchange, and get all users and the corresponding email. for the connection i have .. RunspaceConfiguration rsConfig = RunspaceConfiguration.Create(); PSSnapInException snapInException = null; PSSnapInInfo info = rsConfig.AddPSSnapIn("Microsoft.Exchange.Management.PowerShell.Admin", out snapInException); Runspace myRunSpace = RunspaceFactory.CreateRunspace(rsConfig); myRunSpace.Open(); Pipeline pipeline = myRunSpace.CreatePipeline(); Command myCommand = new Command("Get-Mailbox"); pipeline.Commands.Add(myCommand); Collection<PSObject> commandResults = pipeline.Invoke(); // Ok, now we've got a bunch of mailboxes, cycle through them foreach (PSObject mailbox in commandResults) { //define which properties to get foreach (String propName in new string[] { "Name", "EmailAddresses", "Database", "OrganizationalUnit", "UserPrincipalName" }) { //grab the specified property of this mailbox Object objValue = mailbox.Properties[propName].Value; .......

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• Process a batch of items, return an object to report on status

  - by Naeem Sarfraz

  I'm looking for a pattern (or good practice) for the following scenario: My function List<BatchItemResponse> Process(List<BatchItem> Data) {..} will process a list of data, and return info on where each item in the batch could be processed. struct BatchItemResponse { int BatchItemID; bool Processed; string Description; } Any thoughts? Is what I've proposed as good as it gets?

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• IE downloads and installs CAB dialog popup upon every page refresh

  I have a signed cab on an aspx page. I am seeing the following inconsistent behavior. Any insights would be highly appreciated. On some machines, the cab is downloaded and installed on every page refresh. On few of those machines, the IE "install cab" dialog pops up on every page refresh, while on the others it pops up only once. Additional info: The CAB contains a .NET DLL The CAB is slightly large (around 30 MB), hence recurring download behavior is a pain Target browsers are IE6 and IE7, and the behavior is common to both!

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• RegEx (php) - unite lines in multiline replacement

  - by Qiao

  I need change background of all text that have two spaces from the start of the line. text shold be converted to "<div class='special'>text</div>" That is easy: $text = preg_replace("|^ (.+)|um", "<div class='special'>$1</div>", $text); But line1 line2 Is converted to <div class='special'>line1</div> <div class='special'>line2</div> Though <div class='special'>line1 line2</div> is needed. How that can be achieved?

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• Exploring search options for PHP

  - by Joshua

  I have innoDB table using numerous foreign keys, but we just want to look up some basic info out of it. I've done some research but still lost. 1) How can I tell if my host has Sphinx installed already? I don't see it as an option for table storage method (i.e. innodb, myisam). 2) Zend_Search_Lucene, responsive enough for AJAX functionality of millions of records? 3) Mirror my innoDB with a myisam? Make every innodb transaction end with a write to the myisam, then use 1:1 lookups? How would I do this automagically? This should make MyISAM ACID-compliant and free(er) from corruption no? 4) PostgreSQL fulltext queries don't even look like SQL to me wtf, I don't have time to learn a new SQL syntax I need noob options 5) ???????????????????? This is high volume site on a decently-equipped VPS Thanks very much for any ideas.

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