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• How to find crc32 of big files ?

  - by Arsheep

  The PHP's crc32 support string as input.And For a file , below code will work OFC. crc32(file_get_contents("myfile.CSV")); But if file goes huge (2 GB) it might raise out of memory Fatal error. So any way around to find checksum of huge files ?

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• Getting level values from PCM raw data using Core Audio

  - by John

  I am trying to extract level data from a PCM audio file using core audio. I have gotten as far as (I believe) getting the raw data into a byte array (UInt8) but it is 16 bit PCM data and I am having trouble reading the data out. The input is from the iPhone microphone, which I have set as: [recordSetting setValue:[NSNumber numberWithInt:kAudioFormatLinearPCM] forKey:AVFormatIDKey]; [recordSetting setValue:[NSNumber numberWithFloat:44100.0] forKey:AVSampleRateKey]; [recordSetting setValue:[NSNumber numberWithInt:1] forKey:AVNumberOfChannelsKey]; [recordSetting setValue:[NSNumber numberWithInt:16] forKey:AVLinearPCMBitDepthKey]; [recordSetting setValue:[NSNumber numberWithBool:NO] forKey:AVLinearPCMIsBigEndianKey]; [recordSetting setValue:[NSNumber numberWithBool:NO] forKey:AVLinearPCMIsFloatKey]; which is obviously 16 bits. I am then trying to just print out a few values to see if they look reasonable for debug purposes below, and they do not look reasonable (many 0's). ExtAudioFileRef inputFile = NULL; ExtAudioFileOpenURL(track.location, &inputFile); AudioStreamBasicDescription inputFileFormat; UInt32 dataSize = (UInt32)sizeof(inputFileFormat); ExtAudioFileGetProperty(inputFile, kExtAudioFileProperty_FileDataFormat, &dataSize, &inputFileFormat); UInt8 *buffer = malloc(BUFFER_SIZE); AudioBufferList bufferList; bufferList.mNumberBuffers = 1; bufferList.mBuffers[0].mNumberChannels = 1; bufferList.mBuffers[0].mData = buffer; //pointer to buffer of audio data bufferList.mBuffers[0].mDataByteSize = BUFFER_SIZE; //number of bytes in the buffer while(true) { UInt32 frameCount = (bufferList.mBuffers[0].mDataByteSize / inputFileFormat.mBytesPerFrame); // Read a chunk of input OSStatus status = ExtAudioFileRead(inputFile, &frameCount, &bufferList); // If no frames were returned, conversion is finished if(0 == frameCount) break; NSLog(@"---"); int16_t *bufferl = &buffer; for(int i=0;i<100;i++){ //const int16_t *bufferl = bufferl[i]; NSLog(@"%d",bufferl[i]); } } Not sure what I am doing wrong, I think it has to do with reading the byte array. Sorry for the long code post...

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• How is this GUI principle called?

  - by ripper234

  "Prefer to design UI that guides the user to provide correct input before submitting a form over presenting an error message when he submits it incorrectly" Is there a canonical link that explains this (similar to KISS)?

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• How do I get mercurial to show the diff during `hg com`?

  - by Kev

  Is there a way to configure hg com so that in the commit message file that pops up in the external editor, instead of just showing which files were changed (in the HG: lines) it actually shows the full diff? I'd rather view the output and compose my commit message simultaneously from the comfort of my text editor as opposed to doing hg diff on the command line separately beforehand.

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• Need to send a pasting command from one program to another?

  - by Roy

  I am using one program to monitor the keyboard for input but would like to use that same program to populate the clipboard then automatically paste to the cursor location of the other program? Can this be done... I am using Delphi 4 Pro.

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• ASP.NET MVC, Cache individual User Control

  - by Alex

  How do I cache an individual user control with ASP.NET MVC? I also need the VaryByParam etc support that usually comes with ASPX Output Caching. I don't want to cache the entire action though, only one of my user controls in the view. An example would be nice :) Thank you!

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• Are there any good ORMs (preferably JPA implementations) that support SQLLite (on Android)?

  - by yamsha

  I found a post from a while ago that addresses a similar question but I think it's a bit outdated. I realize implementations of JPA tend to be more on the heavy/dense side, so if you know of any lightweight (non-JPA) ORMs I'll most certainly appreciate your input. I did see the answer about ActiveAndroid in the other post and am curious to know if anyone tried it out.

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• Difference in declaring IDisposable member in using block or at using block declaration?

  - by dotnetdev

  Hi, I have the code below: using (SqlCommand command = new SqlCommand()) { command.CommandType = System.Data.CommandType.StoredProcedure; command.Connection = new SqlConnection(); command.CommandText = ""; command.Parameters.Add(new SqlParameter("@ExperienceLevel", 3).Direction = System.Data.ParameterDirection.Input); SqlDataReader dataReader = command.ExecuteReader(); } Is there any functional impact in declaring the SqlConnection where I currently am declaring it as opposed to like so?: using (SqlCommand command = new SqlCommand()) using (SqlConnection connection = new SqlConnection()) Thanks

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• How to build form completion/document merge application with Winforms or WPF?

  - by Mike

  I need to build an application that accepts user input data (such as name, address, amount, etc.) and then merges it with a pre-loaded document template (order form) and then prints this merged document. I can use Windows Forms or WPF for this project. Any suggestions on how best to approach this? I'm experienced with Winforms development, but don't have any idea how to handle merging the data to the document for printing.

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• PHP GD problem--not enough permission to make image?

  - by aaron

  Error: Warning: imagejpeg() [function.imagejpeg]: Unable to open 'images/xxx/xxx.jpg' for writing: Permission denied in /usr/www/users/xxx/resources/func.createthumbs.php on line 48 images/xxx/xxx/xxx.jpg Warning: Cannot modify header information - headers already sent by (output started at /usr/www/users/xxx/resources/updatethumbs.php:17) in /usr/www/users/xxx/resources/func.createthumbs.php on line 3 So... How can I change the permission? This is being run on a shared server--is it possible?

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• What's the simplest and most robust way to have constant-height submit button with rounded corners?

  - by taw

  Constant height so just left/right images should be necessary instead of having 4+, right? I'd still want top-to-bottom color gradient (and different one on hover). If possible, I'd prefer if it was still an <input type='submit'> and not anything weird. Is there any way (website / imagemagick script etc.) to generate these images automatically or do I need to draw them in some graphics program?

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• LINQ2SQL:Calling Stored procedure and reading return value

  - by Shyju

  Using LINQ 2SQL , How can i call a stored procedure which returns either 1 or 0 when being executed.My procedure has 3 input params.I want to know the return value from procedure in my code too.

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• using thread to load xsl transformation gives error.

  - by infant programmer

  I had to use threading to avoid "XSL Compilation time-out error" Now the problem I am facing is: It gives error, saying the output-string(generated as a result of transformation) is null!! Here is my C# code : [click_me] And the errors I am getting is copied in this text file : [click_me] And the original code without threading .. [click_me]

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• MVVM User control - where do i declare it to get data from page ?

  - by Anish

  I have a WPF user control ...which is in MVVM. The user control(which contains a listview) need data from the page (where it is included). I have to set a property in View's code behind to get this data input. Will this comply with MVVM(But MVVM pattern do not support adding code in code behind file of view as far as i know).if not, what is the way for the same?

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• Removing spaces from columns of a CSV file in bash

  - by vikas ramnani

  I have a CSV file in which every column contains unnecessary spaces(or tabs) after the actual value. I want to create a new CSV file removing all the spaces using bash. For example One line in input CSV file value1 ;value2 ;value3 ;value4 same line in output csv file should be value1;value2;value3;value4 I tried using awk to trim each column but it didnt work. Can anyone please help me on this ? Thanks in advance :)

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• Touchpad access in Linux

  - by Mike Hordecki

  Hi! The problem is: How to access x,y,z coordinates of my touchpad? Now that SHMConfig is disabled by default, I've found out that, in order to do it, I need to access a file from /dev/input/. Those files are, sadly, readable by root only. Is there any way to access the touchpad while in user-mode?

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• How do I focus an HTML text field on an iPhone (causing the keyboard to come up)?

  - by Ross

  I'm writing an iPhone web app, and I want to automatically focus a text field when the page is loaded, bringing up the keyboard. The usual Javascript: input.focus(); doesn't seem to be working. Any ideas?

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• [MSVC++ 2008] Using preprocessor directives to define command line options

  - by Gbps

  If I wanted to add, let's say, a new .lib to the build only if a particular #define was set, how would I do that? In the MSVC++ 2008 "Property Pages", you would simply add: Config Properties -> Linker -> Input -> Additional Dependencies, but I would like it if something like #define COMPILE_WITH_DETOURS was set, then the particular library would be added to the dependencies, otherwise it would be removed. Thanks!

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• C++ application as a service with high performance

  - by sand

  I need to provide a C++ application as a service. Client of the service and the service can be on the same machine or distributed on different machines based on the load. This application takes a ~2KB string as input and returns almost similar size of string after some processing. Turnaround time for the client should be really quick. What is the best mechanism to implement this?

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• Using Lua, check if file is a directory

  - by PeterMmm

  If i have this code local f = io.open("../web/", "r") print(io.type(f)) -- output: file how can i know f points to a directory ?

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• Problem in sending username and password using jquery

  - by Alvin

  Hi, I want to send the username and password values which user types in html input elements to server to check if the username and password is valid or not when user click login button, using post request in $.ajax(options) method in jquery, but I don't know how to send those username and password to server. What option should I write in $.ajax(options) method to get those values from server?

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• How to adjust SQL LIKE function?

  - by slave016

  I want to make this kind of query: create procedure something @name varchar(13) as begin select * from WORKER where NAME LIKE "%@name%" end For input @name=ho, I want output every row that contains NAME wich sounds "ho", for example HOuse, soHO, broHOw...

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• python count number of times the date has appeared

  - by Rajeev

  From the following array,how to count the dates for the number of times it has occured in the array.The output should be in the following format [date,count] new_dates = [['2012-12-02', 14],['2012-12-03',2],....] Input: dates = [['2012-12-02', 17], ['2012-12-01', 5], ['2012-12-02', 15], ['2012-12-02', 8], ['2012-12-02', 17], ['2012-12-02', 15], ['2012-12-11', 6], ['2012-12-02', 1], ['2012-12-02', 9], ['2012-12-02', 11], ['2012-12-03', 13], ['2012-12-03', 10], ['2012-12-02', 18], ['2012-12-02', 11], ['2012-12-02', 12], ['2012-12-05', 14], ['2012-12-02', 3], ['2012-12-02', 6], ['2012-12-06', 10], ['2012-12-07', 0], ['2012-12-08', 3], ['2012-12-09', 12], ['2012-12-02', 6]]

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• C# calcuate date ranges from a list of dates.

  - by nakulringshia

  Hi Given a list of dates (which may not be sorted), I want to build a list of date ranges - E.g. Assuming MM/DD format, Input - 5/1, 5/5, 5/6, 5/15, 5/7, 5/8, 5/19,5/20, 5/23 Output - Date Range 1: 5/1 to 5/1 Date Range 2: 5/5 to 5/8 Date Range 3: 5/15 to 5/15 Date Range 4: 5/19 to 5/20 Date Range 5: 5/23 to 5/23 Basically, a range should be continuous. Thanks Nakul Ringshia

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• Is there a way to flush html to the wire in Sinatra

  - by thismatt

  I have a Sinatra app with a long running process (a web scraper). I'd like the app flush the results of the crawler's progress as the crawler is running instead of at the end. I've considered forking the request and doing something fancy with ajax but this is a really basic one-pager app that really just needs to output a log to a browser as it's happening. Any suggestions?

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