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• How to stream a WAV file?

  - by jonasb

  I'm writing an app where I record audio and upload the audio file over the web. In order to speed up the upload I want to start uploading before I've finished recording. The file I'm creating is a WAV file. My plan was to use multiple data chunks. So instead of the normal encoding (RIFF, fmt , data) I’m using (RIFF, fmt , data, data, ..., data). The first issue is that the RIFF header wants the total length of the whole file, but that is of course not known when streaming the audio (I’m now using an arbitrary number). The other problem is that I'm not sure if it's valid since Audacity doesn't recognise the file, and Windows Media Player opens the file but plays only a very small part. I've been reading WAV specs but haven’t found an answer. Any suggestions?

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• Logging fatal/parse errors in PHP5

  - by PeterBelm

  I'm writing an error logging service that will be integrated into websites running on my server, that will email me error batches, etc. So I've been trying to find out if there's a way to handle fatal and parse errors, however not using the tricks to handle it in PHP code (output buffer, shutdown function). I'm quite happy to write some C code or something to handle it outside of my PHP code. I would also like to issue a redirect if possible (my sites use output buffering so there shouldn't be any headers sent). I'm pretty sure this could be done with a PHP module, but I've never written one and have no idea where to start.

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• How to 'insert if not exists' in MySQL?

  - by warren

  I started by googling, and found this article which talks about mutex tables. I have a table with ~14 million records. If I want to add more data in the same format, is there a way to ensure the record I want to insert does not already exist without using a pair of queries (ie, one query to check and one to insert is the result set is empty)? Does a unique constraint on a field guarantee the insert will fail if it's already there? It seems that with merely a constraint, when I issue the insert via php, the script croaks.

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• RegEx (or other) parsing of script

  - by jpmyob

  RegEx is powerful - it is tru but I have a little - query for you I want to parse out the FUNCTIONS from some old code in JS...however - I am RegEx handicapped (mentally deficient in grasping the subtleties).. the issue that makes me NOT EVEN TRY - is two fold - 1) myVar = function(x){ yadda yadda } AND function myVar(x) { yadda yadda } are found throuout - COLD I write a parser for each? sure - but that seems inefficient... 2) MANY things may reside INSIDE the {} including OTHER sets of {} or other Functions(){} block of text... HELP - does anyone have, or know of some code parsing snippets or examples that will parse out the info I want to collect? Thanks

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• Silverlight avoid lose focus on datagrid

  - by lidermin

  Hi, I have a question: How could I keep the focus on a combobox of a cell inside a datagrid in edit mode; even when I drag a textbox inside a scroll viewer to drag & drop. This is the behaviour I need: The user start to edit a cell by double clicking, and a combobox is showed, then the user could drag and drop some text (one of the texboxes inside the scroll viewer) to the combobox I mentioned. The issue is: when I click on one those textboxes to drag & drop, I lose the focus of the datagrid, and I can't drop it to the cell (the combobox), because I lose the edit mode (it's not a combobox anymore, the datagrid is on query mode). How can I achieve the behaviour I need? Please help. Thanks.

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• Installing Windows XP with pre installed Windows 7

  - by user243680

  Hello! I want to install Windows XP on my dell laptop which has pre installed Windows7 on it. I want windows Xp on my system because of my project issue. Now the problem is Windows7 does not allow to install Windows Xp on my system. I dont mind if windows 7 gets replaced by Windows XP,all i want is windows XP on my system.I am not getting the way to install XP. Can anyone guide me how to install Windows XP on my laptop? i need an urgent help.

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• How to redirect Sub domain as attribute in page with .htaccess

  - by rkaartikeyan

  I want like this Ex: http://user1.mysite.com or http://user2.mysite.com if anyone enter URL Like these on browsers it should go as bellow http://mysite.com/user.php?userName=user1 How can i solve this with .htaccess With help of Prix i solved this Issue RewriteEngine On RewriteCond %{HTTP_HOST} !^www\.mysite\.com [NC] RewriteCond %{HTTP_HOST} ^(.*)\.mysite\.com RewriteRule ^(.*)$ http://mysite.com/user.php?userName=%1 [R=301] Its working fine :) http://user1.mysite.com http://mysite.com/user.php?userName=user1 -> This one is working fine with Prix Code Now i want Like Bellow. I have tried lot but not working. So again i don't have anyway rather than ask here. I want like this http://user1.mysite.com/inbox/ http://mysite.com/inbox.php?userName=user1 And also Like this http://user1.mysite.com/message/1 http://mysite.com/view-message.php?userName=user1&messageID=1

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• py2app generates .app with no errors but .app crashes and quits unexpectedly

  - by user3705730

  I am trying to use py2app and it generates .app with no errors but .app crashes and quits unexpectedly. I am trying to do this in virtualenv so I am not sure if that is an issue with all the paths. It works on my computer when all the virtual environments exist but as soon as I close them down, the .app no longer works. The virtual environment I am using has python 2.7.5 Here is my setup.py: """ This is a setup.py script generated by py2applet Usage: python setup.py py2app """ from setuptools import setup APP = ['myApp.py'] DATA_FILES = [] OPTIONS = {'argv_emulation': True, 'packages': ['pulp']} setup( app=APP, data_files=DATA_FILES, options={'py2app': OPTIONS}, setup_requires=['py2app'], )

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• How do I render a partial to a string from within a filter attached to a controller

  - by Tristan Havelick

  I have some code I need to use in multiple controllers in a rails 1.0 application (I can't, for strange reasons upgrade to a newer rails). I've extracted the relevant code into a filer object, and I'm using the around_filter construct to execute it. Before the extract, I was using the method render_to_string() to get the contents of a rendered partial into a string. However, this method is protected, so I am unable to access it from within my Filter object. As a workaround, I tried adding this to my ApplicationController: def render_to_string(*a) super(*a) end this seems to have remedied the protection level issue, but now I get the error: Can only render or redirect once per action When no such error occurred before the extraction. Why? Is there a different approach I should take here?

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• Website renders two scroll bars, is it the CSS, xhtml, or some jquery plugin?

  - by Muhammad

  I've come to notice a bug on my website, I see that there's two scroll bars when the window is re-sized from a full sized window (my desktop's 1280x900). This issue is untraceable with Firebug and it shows up on all browsers. I'm using a JQuery UI script on the page as well but I'm not sure if that's what's doing this. What's a good way to go about getting rid of this? Or has anyone ever encountered having two scroll bars on the page? BTW: The in-page scroll bar is actually above the footer, if that helps.

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• Easy way for Crystal Reports to MS SQL Server Reporting Services conversion

  - by scoob

  Is there a way to easily convert Crystal Reports reports to Reporting Services RDL format? We have quite a few reports that will be needing conversion soon. I know about the manual process (which is basically rebuilding all your reports from scratch in SSRS), but my searches pointed to a few possibilities with automatic conversion "acceleration" with several consulting firms. (As described on http://www.microsoft.com/sql/technologies/reporting/partners/crystal-migration.mspx). Do any of you have any valid experiences or recomendations regarding this particular issue? Are there any tools around that I do not know about?

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• Browser gets blocked, workers to the rescue?

  - by tb_selleo

  Hello, I use JavaScript for rendering 20 tables of 100 rows each. The data for each table is provided by controller as JSON. Each table is split into section that have "totals" and have some other JavaScript logic code. Some totals are outside of the table itself. As a result JavaScript blocks browser for a couple of seconds (especially in IE6) :( I was consideting to use http://code.google.com/p/jsworker/, however Google Gears Workers (I guess workers in general) will not allow me to make changes to DOM at the worker code, and also it seems to me that I can not use jQuery inside jsworker worker code. (Maybe I am wrong here?). This issue seems to be fundamental to the JavaScript coding practice, can you share with me your thoughts how to approach it?

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• What are the most likely reasons an application would fail on only one of my servers?

  - by Rising Star

  I have several servers to test new code on. I primarily push out asp.NET web applications. Last week, I had an issue where I installed a newly developed web application on three servers. The three servers all run in separate environments. The application worked fine on two of them, but consistently crashed on the third server with each web request. The problem was eventually traced to an in-house developed .dll file being out of date on the third server. I'm certain that this kind of thing happens all the time. However, there are numerous things that could go wrong to cause this kind of behavior. I spent quite a bit of time tracing this problem. I would like to make a list of things to be suspicious of next time this happens? What are the most likely reasons that a web application would crash on one of my servers while identical code runs fine on another server.

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• value was "" blank when refreshing the page manually

  - by crisgomez

  Hi, I have a problem regarding the maintaining of value when page was refresh.I assign a value into a hidden control using javascript below: function displaytab(tabID) { var tabId = document.getElementById("ctl00_MainContent_tabId"); switch (tabID) { case 1: tabId.value=1; break; case 2: tabId.value=2; break; case 3: tabId.value=3; break; default: tabId.value=0; break; } but when i refresh the page the value was ("") blank. Is there any way how to resolved this issue? or what is the best way to do this?

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• Get DataGridView checkbox cell value?

  - by George

  Hello guys. I'm having a strange issue here. I have a 3 column datagrid that is filled by a connection with the database. So far so good. I have an extra column, of checkbox type. I need to get it's value for perfoming a bulk operation on it. Here is the catch: When all cells are selected, it works fine. But when an user selects any cell that its not the first, software gives me a object reference exception. Here is the code public List<String> GetSelected() { List<String> selected = new List<String>(); foreach(DataGridViewRow row in datagrid.rows) { if ((Boolean)row.Cells[wantedCell].Value == true) { selected.Add(row.Cells[anotherCell]); } } } I tracked down the failure to the if-test, throwing a exception, because the value of the cell is read as null. Any thougths? Thanks

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• What are some of the best automated web QA tools out there?

  - by Kant

  Issue We have a series of websites built in ASP.NET that we deploy frequently. Due to the lack of a QA team, we are unable to test the functionality and load of every web page within the site. Question What are some of the top tools for doing QA testing. The tool should include some basic functionality, such as: Notifying parties when unexpected results occur. Expected results should be configurable (i.e. Hit web page A, if the response doesn't have the string, "My intranet portal" in it, notify the appropriate parties). Any help is appreciated.

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• Intellisense for Javascript - not correct in Visual Studio 2008/2010

  - by Finglas

  var obj = document.getElementById("header"); Given the above code snippet, I should be able to wire event handlers. For example, I can wire onMouseDown to the mouse down event, the issue is that Visual Studio does not display this in the Intellisense. I'm trying something such as: obj.onmousedown = mousestatus; Based on a book I'm reading, the code is valid (at least it works) therefore I see no reason why Intellisense is not picking it up. I've tried this on both a standalone Javascript file, as well as an MVC project to no luck. Is there anything I'm doing wrong - or is there a way to resolve this?

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• Hibernate: getting a record but it's being updated in the database?

  - by jack

  For some reason Hibernate seems to be keeping my session open and updating the object without me explicitely invoking a save/update/saveorupdate. I guess the session is staying open and it's beeing marked as dirty. However this is not the desired behaviour, so what's the cleanest way to fix this? The issue seems to occur because I store a phone number without formatting in the database but the getter of the object returns a formatted telephone number. My flow: go to a jsp = controller = service = dao DAO getter function if(userId != 0) { return (User)dbFactory.get(User.class, userId); } return null; The service just passes it to the controller and the controller puts te User object in the request scope. I display it on my JSP page using EL.

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• How is load balancing in big systems implemented?

  - by uther-lightbringer

  Hello, I'm wondering how is implemented load balancing in realy big applications like google or facebook. I know that in normal scenario there may be machine dedicated to this task, but I would like to know how is it resolved in realy big aplication with hundreds of thousans people accessing it in any given time. I am just wondering how exactly when one types google.com will that request find its way to concrete computer (are there multiple load balancers? and how is it set up and implemented that user's request will find the way to concrete balancer out of many others). I will realy appreciate if someone enlightens me this issue, thank you.

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• Another floating point question

  - by jeffmax329

  I have read most of the posts on here regarding floating point, and I understand the basic underlying issue that using IEEE 754 (and just by the nature of storing numbers in binary) certain fractions cannot be represented. I am trying to figure out the following: If both Python and JavaScript use the IEEE 754 standard, why is it that executing the following in Python .1 + .1 Results in 0.20000000000000001 (which is to be expected) Where as in Javascript (in at least Chrome and Firefox) the answer is .2 However performing .1 + .2 In both languages results in 0.30000000000000004 In addition, executing var a = 0.3; in JavaScript and printing a results in 0.3 Where as doing a = 0.3 in Python results in 0.29999999999999999 I would like to understand the reason for this difference in behavior. In addition, many of the posts on OS link to a JavaScript port of Java's BigDecimal, but the link is dead. Does anyone have a copy?

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• Jquery click function does not load ajax tabs

  - by user342391

  I have some tabs that load ajax content. When I click on the tabs it loads the ajax content perfectly no issues works exactly like it does in the Jqueryui demos. But when I try and change tab using an onclick function it opens the tab but doesn't do the ajax. Is this a known issue can it be done?? Do ajax tabs rely on the user clicking the href to know what to load. This is the code: $(".step2next").click(function() $('#signuptabs').tabs("select" , 1));

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• PHP exec() not executing batch files

  - by Andreas Bonini

  I tried googling for this issue and found many people with the same problem but no solution. $result = exec("C:\\Ruby191\\bin\\lessc.bat less\\$file", $output); Here result is an empty string and output an empty array. Same thing with: $result = exec("cmd /c C:\\Ruby191\\bin\\lessc.bat less\\$file", $output); I am sure the path is correct; I am sure exec() is enabled. I tried exec, shell_exec, system and none work. lessc is less CSS.

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• ScheduledThreadPoolExecutor executing a wrong time because of CPU time discrepancy

  - by richs

  I'm scheduling a task using a ScheduledThreadPoolExecutor object. I use the following method: public ScheduledFuture<?> schedule(Runnable command, long delay,TimeUnit unit) and set the delay to 30 seconds (delay = 30,000 and unit=TimeUnit.MILLISECONDS). Sometimes my task occurs immediately and other times it takes 70 seconds. I believe the ScheduledThreadPoolExecutor uses CPU specific clocks. When i run tests comparing System.currentTimeMillis(), System.nanoTime() [which is CPU specific] i see the following schedule: 1272637682651ms, 7858346157228410ns execute: 1272637682667ms, 7858386270968425ns difference is 16ms but 4011374001ns (or 40,113ms) so it looks like there is discrepancy between two CPU clocks of 40 seconds How do i resolve this issue in java code? Unfortunately this is a clients machine and i can't modify their system.

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• HTTP request stream not readable outside of request handler

  - by Jason Young

  I'm writing a fairly complicated multi-node proxy, and at one point I need to handle an HTTP request, but read from that request outside of the "http.Server" callback (I need to read from the request data and line it up with a different response at a different time). The problem is, the stream is no longer readable. Below is some simple code to reproduce the issue. Is this normal, or a bug? function startServer() { http.Server(function (req, res) { req.pause(); checkRequestReadable(req); setTimeout(function() { checkRequestReadable(req); }, 1000); setTimeout(function() { res.end(); }, 1100); }).listen(1337); console.log('Server running on port 1337'); } function checkRequestReadable(req) { //The request is not readable here! console.log('Request writable? ' + req.readable); } startServer();

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• PHP Captcha without session

  - by Anton N

  Ok, here is an issue: in the project i'm working on, we can't rely on server-side sessions for any functionality. The problem is that common captcha solutions from preventing robotic submits require session to store the string to match captcha against. The question is - is there any way to solve the problem without using sessions? What comes to my mind - is serving hidden form field, containing some hash, along with captcha input field, so that server then can match these two values together. But how can we make this method secure, so that it couldn't be used to break captcha easily.

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