compression

问题 This question already has answers here : Which compression method to use in PHP? (4 answers) Closed 5 years ago . I am compressing the array with gzcompress(json_encode($arr),9). So I am converting array into string with json_encode and then compress with gzcompress. But I could not find the much difference in the size of the resulted string. Before compression size is 488 KB and after compression size is 442 KB. Is there any way I can compress the string further? Thanks in advance. 回答1: How

问题 Im doing a query that returns like 70k documents (I need all of them, and Im currently using scan & scroll) What happens is that the response is very large (2 MB and we alredy reduced it from 6 MB). We alredy filtered the fields we needed, and since the query is only called from an API we reduced the name of the properties. What i can see is that every document in the array "hits" has the following default fields that i really dont need them: _index (we only request on one index) _type (we

问题 I need to create a function called compress that compresses a string by replacing any repeated letters with a letter and number. My function should return the shortened version of the string. I've been able to count the first character but not any others. Ex: >>> compress("ddaaaff") 'd2a3f2' def compress(s): count=0 for i in range(0,len(s)): if s[i] == s[i-1]: count += 1 c = s.count(s[i]) return str(s[i]) + str(c) 回答1: Here is a short python implementation of a compression function: def

问题 Recently I came across one nice problem, which turned up as simple to understand as hard to find any way to solve. The problem is: Write a program, that reads a text from input and prints some other program on output. If we compile and run the printed program, it must output the original text. The input text is supposed to be rather large (more than 10000 characters). The only (and very strong) requirement is that the size of the archive (i.e. the program printed) must be strictly less than

问题 I have a program that returns rows of allowed arrays (as follows) which are stored in a file (say output.txt), using python program.py>output.txt on the windows 7 command line: 0 , 0 , 1 , 1 , 6 0 , 0 , 1 , 2 , 1 0 , 0 , 1 , 4 , 1 0 , 0 , 1 , 6 , 1 0 , 0 , 2 , 0 , 0 I later use output.txt as input for another program, which reads it row by row into an array. The output.txt file is about 1.5 GB. I can use 7-zip to reduce it to 33 MB. I risk running out of memory for the larger output data

问题 I have a gzip file sample, with standard gzip header 1F 8B 08 00 ... , when I inflate it with inflate* functions in zlib, the output is only 11 bytes(in fact the output should be about 4KB), but when I decompress it with gz* functions, it produce the correct output, the code: using gz* (this can produce correct output): #define CHUNK 10240 int gz_decompress(const char *path) { gzFile f = gzopen(path, "rb"); if(!f) return -1; unsigned char result[CHUNK]; int bytes_read = gzread(f, result,

问题 I have an win forms App that the users use off line, any they have to sync data using a 3g modem and a cisco VPN, unfortunately the limited band width, poor signal quality and large volume of data transferred is making the sync process unreliable. is there any way to get .net to compress the SQL commands and then having sql decompress and run before sending the results in a compressed reply to reduce the network traffic? 回答1: To create off-line synchronization i recommend to use Service

问题 I used below method to compress image before uploading it to server. To summarize the below code, Initially i take image from phone/sdcard, convert it to bitmap and carryout scaling and compression on bitmap. then i save the compressed bitmap on the disk as image in new location. This method does compress the image from 3mb - 5mb to just in 30-100kb. (when i check the compressed image size on sdcard) Then i send the newly compressed image of 30-100kb to upload on to the server by converting

问题 So, I'm currently working on a LAN-Video-Streaming program, which records single images and sends them over. Because it would be too much to send 30 1920x1080 pictures per second, to get 30FPS, I did some research and found JPEG-Compression. The problem is, that when I try to save the compressed JPEG, it throws an System.Runtime.InteropServices.ExternalException , with the additional information: General error in GDI+. Here's my code: Private Sub Stream() Handles StreamTimer.Tick If Streaming

问题 I would like to unzip and parse an xml file located here Here is my code: HttpClientHandler handler = new HttpClientHandler() { CookieContainer = new CookieContainer(), UseCookies = true, AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate, // | DecompressionMethods.None, }; using (var http = new HttpClient(handler)) { var response = http.GetAsync(@"https://login.tradedoubler.com/report/published/aAffiliateEventBreakdownReportWithPLC_806880712_4446152766894956100