compression

问题 My assignment is to compress a DNA sequence. First enconding using a = 00 c = 01 g = 10 t = 11. I have to read in from a file the sequence and covert to my encoding. i know i have to use the bitSet class in java, but I'm having issues with how to implement. How do I ensure my encoding is used and the letters are not converted to actual binary. this is the prompt: Develop space efficient Java code for two kinds of compressed encodings of this file of data. (N's are to be ignored). Convert

问题 I am using Snappy-java to encode JSON data and I want to store the result in database in a varchar column. The database is an oracle database with ISO-8859-1 encoding. I am facing an encoding problem when inserting the data. It would seem that some characters are not recognised by Oracle. I've found a workaround by using Base64 encoding on the compressed data before inserting it. I can then retrieve it just fine :) The problem with that is that Base64 encoding increases the length of the data

问题 I'm trying to compress a .csv file without using any 3rd party or framework provided compression libraries. I have tried, what I wish to think, everything. I looked at Huffman, but since I'm not allowed to use that solution I tried to do my own. An example: 6NH8,F,A,0,60541567,60541567,78.78,20 6NH8,F,A,0,60541569,60541569,78.78,25 6AH8,F,B,0,60541765,60541765,90.52,1 QMH8,F,B,0,60437395,60437395,950.5,1 I made an algorithm that counts every char and gives me amount of times they've been used

问题 I have a Delphi 6 DirectShow application that exchanges audio with Skype via sockets. I am getting an intermittent access violation in one of the threads started by one of the DLLs loaded by the Filter Graph when the DirectShow filter chain is ran. As I discovered in a previous SO post with the help of another SO member, the thread that faults appears to be started by the Microsoft Audio Compression Manager (msacm32.dll): How can I tell what DLL started a thread and what address space a DLL

问题 I snagged a Lorem Ipsupm generator last week, and I admit, it's pretty cool. My question: can someone show me a tutorial on how the author of the above script was able to post the contents of a gzipped file into their code as a string? I keep getting examples of gzipping a regular file, and I'm feeling kind of lost here. For what it's worth, I have another module that is quite similar (it generates random names, companies, etc), and right now it reads from a couple different text files. I

问题 I need to allow users to upload large files and it can take a long time especially on mobile devices with slower connections. I'm curious to know if there are production-ready options for compressing the files on the client side prior to uploading. The files will be primarily mp4, mov, and 3gp. Also, if this is even possible, is it safe and what would I need to do on the server side (php) to safely uncompress them. 回答1: The file formats that you are naming are already heavily compressed,

问题 I am making an iOS app (Android soon) that involves users recording videos on their phones through the app. But I need the app to reduce the default size of those videos so that when they are uploaded to my server less bandwidth is used and it uploads faster. What is the best way to do that? 回答1: Try this code hope your task done. - (void)convertVideoToLowQuailty:(NSURL*)inputURL outputURL:(NSURL*)outputURL handler:(void (^)(AVAssetExportSession*))handler { [[NSFileManager defaultManager]

问题 I have the function which saves and clears div's style to localStorage on click: var originalAttributes = $('.aaa').attr('style'); $('.aaa').each(function(){ var d = $(this), id = d.attr('id'), storedStyle = window.localStorage.getItem('aaaStyle' + id); if (storedStyle != undefined){ //style stored d.attr('style', storedStyle); } }); //mouse event functions for class="aaa" $('#save').click(function () { $('.aaa').each(function(){ var d = $(this), id = d.attr('id'), style = d.attr('style'); if

问题 I am using Basic plan in azure , but gzip compression is not working properly. I have tried two methods in asp mvc web app: Method 1 : Using Action Filter public class EnableCompressionAttribute : ActionFilterAttribute { public override void OnActionExecuting(ActionExecutingContext filterContext) { var encodingsAccepted = filterContext.HttpContext.Request.Headers["Accept-Encoding"]; if (string.IsNullOrEmpty(encodingsAccepted)) return; encodingsAccepted = encodingsAccepted.ToLowerInvariant();

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 4 years ago . I'm working on a public project and one of the things we are after is a CSS file merger and minimizer and a js file merger and minimizer. The requisites are as follows: No beta code. Only stable code. Must be written in php. Must work in php 5.4. Must be compatible with php 5.3 The CSS minimizer program may be