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Why use deflate instead of gzip for text files served by Apache?
...952 [25]. This format is a
Lempel-Ziv coding (LZ77) with a 32 bit CRC.
RFC 1952 defines the compressed data as:
The format presently uses the DEFLATE method of compression but can be easily extended to use other compression methods.
CRC-32 is slower than ADLER32
Compared to a c...
Getting a File's MD5 Checksum in Java
...-How-to using the MessageDigest class.
Check that page for examples using CRC32 and SHA-1 as well.
import java.io.*;
import java.security.MessageDigest;
public class MD5Checksum {
public static byte[] createChecksum(String filename) throws Exception {
InputStream fis = new FileInputSt...
ElasticSearch, Sphinx, Lucene, Solr, Xapian. Which fits for which usage? [closed]
... query before fetching rows to index
sql_query = SELECT *, id AS pid, CRC32(safetag) as safetag_crc32 FROM hb_posts
sql_attr_uint = pid
# pid (as 'sql_attr_uint') is necessary for sphinx
# this field must be unique
# that is why I like sphinx
# you can store custom stri...
How do MySQL indexes work?
... also create an integer field called url_hash and use a hash function like CRC32 or any other hash function to hash the url when inserting it. And then, when you need to query for this value, you can do something like this:
SELECT url FROM url_table WHERE url_hash=CRC32("http://gnu.org");
The pro...
BLE（二）信道&数据包&协议栈格式 - 创客硬件开发 - 清泛IT社区，...
...有效载荷“和”循环冗余校验“（Cyclical Redundancy Check，CRC）校验码组成。其中，”访问码“有时又称为”访问地址“（access address）
Preamble
1个字节长度，接受中用于频率同步、数据速率同步、自动增益控制调整，固定为0101...
Generating an MD5 checksum of a file
...everal methods of checksumming a file of approx. 11MB:
$ ./sum_methods.py
crc32_mmap(filename) 0.0241742134094
crc32_read(filename) 0.0219960212708
subprocess.check_output(['cksum', filename]) 0.0553209781647
md5sum_mmap(filename) 0.0286180973053
md5sum_read(filename) 0.0311000347137
subprocess.che...
Image fingerprint to compare similarity of many images
...
Normal hashing or CRC calculation algorithms do not work well with image data. The dimensional nature of the information must be taken into account.
If you need extremely robust fingerprinting, such that affine transformations (scaling, rotat...
App Inventor 2 拓展参考文档 · App Inventor 2 中文网
...码/解码
【AES加解密】MareshaAES 拓展：AES加解密算法
【CRC校验】App Inventor 2 CRC16 拓展
【二进制】UrsAI2ByteArray 字节数组扩展：读写二进制数据
【数据库】LeanDB 数据库扩展
【数据库】MySQL + php后端数据库
【数据库】MongoDB ...
App Inventor 2 拓展参考文档 · App Inventor 2 中文网
...码/解码
【AES加解密】MareshaAES 拓展：AES加解密算法
【CRC校验】App Inventor 2 CRC16 拓展
【二进制】UrsAI2ByteArray 字节数组扩展：读写二进制数据
【数据库】LeanDB 数据库扩展
【数据库】MySQL + php后端数据库
【数据库】MongoDB ...
Limit the length of a string with AngularJS
... answered Dec 19 '14 at 20:51
crc442crc442
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