checksum

When I run "mysql> CHECKSUM TABLE mytable;", I got the following result: +------------------+------------+ | Table | Checksum | +------------------+------------+ | mydb.mytable | 1679935596 | +------------------+------------+ How to select and return only the Checksum (not Table) in the above result in one mysql statement? Something like "SELECT Checksum FROM (CHECKSUM TABLE mytable);"??? Tried several times, but no idea. What I want is: +------------+ | Checksum | +------------+ | 1679935596 | +------------+ You can do it by column, or sum of columns. Below is a test on a table of mine.

I was attempting to compare the results of this: (in ant) <javac target="1.5" source="1.5" deprecation="on" fork="yes" optimize="true" debug="true" debuglevel="lines,vars,source"> <classpath> <fileset dir="${project.basedir}/../lib"> <include name="**/*.jar" /> <include name="**/*.zip" /> </fileset> </classpath> </javac> ...against this: (in maven) <plugin> <artifactId>maven-compiler-plugin</artifactId> <version>2.3.2</version> <executions> <execution> <id>compile</id> <phase>compile</phase> <goals> <goal>compile</goal> </goals> <configuration> <target>1.5</target> <source>1.5</source> <debug

I am currently writing a C program that builds a PNG image from a data file generated by another. The image is a palette type. Is the Adler-32 checksum calculated on the uncompressed data for... a) each compressed block within an IDAT data chunk? b) all compressed blocks within an IDAT data chunk? c) all compressed blocks spanning all IDAT data chunks? From the documents at http://www.w3.org/TR/PNG/ , http://tools.ietf.org/html/rfc1950 and rfc1951 (at the same address as previuos) I am of the opinion that it is case 'c' above, allowing one's deflate implementation to chop and change how the

I've written a script that reads through all files in a directory and returns md5 hash for each file. However, it renders nothing for a rather large file. I assume that the interpreter has some value set for maximum processing time, and since it takes too long to get this value, it just skips along to other files. Is there anyway to get an md5 checksum for large files through PHP? If not, could it be done through a chron job with cpanel? I gave it a shot there but it doesn't seem that my md5sum command has ever been processed: I never get an email with the hash. Here's the PHP I've already

I have a quite tricky problem. I send an array of bytes with an iOS device to a ble device (led light) which works just fine. I have a document for all commands which is very poorly translated from chinese. The whole byte-package is build like this: The front of command ( 1 byte ) The length of command packet ( 1 byte ) Command's ID ( 1 byte ) Command's control part ( 1 byte ) Data field ( 15 byte ) Check ( 1 byte ) For example the complete package for switching the light on is "A1080100FFFFFF59" So far everything is clear to me. The only thing I struggle with is the last byte or how it is

I am currently working on the ASTM protocol to send orders tests request to medical instrument. But I cannot send a message to the equipment correctly. To be more explicit, I want for example to send these frames: String h1, s2, s3, s4, s5, s6 = ""; h1 = "H|@^\\|ODM-IdfDGIWA-36|||GeneXpert PC^GeneXpert^4.8|||||LIS||P|1394-97|20070521100245"; s2 = "P|1"; s3 = "O|1|SID-818||^^^TestId-12|S|20070812140500|||||A||||ORH||||||||||Q"; s4 = "O|2|SID-818||^^^TestId-14|S|20070812140600|||||A||||ORH||||||||||Q"; s5 = "O|3|SID-818||^^^TestId-16|S|20070812140700|||||A||||ORH||||||||||Q"; s6 = "L|1|F"; and

def checksum(card_without_check): card_without_check = card_without_check[-1::-1] def numbers(string): return [int(x) for x in string] print(card_without_check) odd_numbers = numbers(card_without_check[0::2]) even_numbers = numbers(card_without_check[1::2]) odd_numbers = [x * 2 for x in odd_numbers] odd_numbers = [x - 9 if x > 9 else x for x in odd_numbers] print(even_numbers) print(odd_numbers) return sum(odd_numbers) + sum(even_numbers) def check(checksum, check): return checksum % 10 == int(check) card_number = input("Enter card number:\n") print(checksum(card_number[:-1])) print("Card is",