ascii value of uppercase and lowercase letters

From the Nginx source code, we will talk about the most efficient code for converting uppercase and lowercase characters and the science of ASCII code tables. The nginx source code is as follows: Nginx-1.6.1/src/core/ngx_string.h 47-48 rows #define

Method One:Uppercase and lowercase letters are subtracted from the ASCII code table by a value of 32It is possible to convert a string into a character arraylowercase to uppercase minus 32Uppercase to lowercase plus 32String s= "good";Char[] C =

Title: Input a sentence by the keyboard, the total number of characters from 1 to 80 is possible, with a carriage return to the end, the uppercase letter into lowercase letters, other types of characters unchanged, and finally output the transformed

So when writing, just list them in ASCII and convert them into character Chr.print [chr(i) for i in range(65,91)]#所有大写字母print [chr(i) for i in range(97,123)]#所有小写字母print [chr(i) for i in range(48,58)]#所有数字Another way to do this is to use the string

ASCII, GB2312, GBK, UTF-8 encoding: Original address: HTTP://HI.BAIDU.COM/PHPEASE/ITEM/F450B5CAEC143014505058FC variable naming rules: 1. Variable names are case-sensitive (case-sensitive). 2. Must begin with a letter or underscore.  Variable

1 ;the ASCII code of the lowercase letter is 20H larger than the uppercase ASCII value. 2 ;For example, the ASCII value of capital A of 01000001 lowercase a is: 011000013 ;Formula A (01100001)-20H (100000) = A (01000001)4 ;A (01000001) + 20H (100000)

From: http://blog.163.com/yang_jianli/blog/static/161990006201371451851274/--------------------------------------------------------------------------------------------1. ANSI CodeBoth Unicode and ANSI are representations of character codes. To

Analysis of ASCII and Unicode-encoded message writing files, asciiunicode Abstr:] ASCII and Unicode are two common character encodings. Their representation methods are different, so they must be differentiated in the program. Based on the actual

1: random number generator ClassRandomIs A. Net pseudo-random number generator. To generate various types of random numbers, you must first obtain its instance object and then generate a random number. 2: Seeds The random number is generated

We know that the Tomcat communication is based on the socket, and the socket on the server side and the client passes the message is not encoded byte stream, each 8 bits constitute 1 bytes, the computer is based on the binary system, which is due to