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, but can only represent one character. A hyphen can be used to represent a range of characters, such as: [A-z]//Match all lowercase letters[A-z]//Match all uppercase letters[A-za-z]//Match all the letters[0-9]//Match all the numbers[0-9\.\-]//Match all numbers, periods and minus signs[\f\r\t\n]//match all whitespace characters Similarly, these also represent only one character, which is a very important one. If you want to match a string consisting of a lowercase letter and a single digit, such

vowel characters in a square bracket: [AaEeIiOoUu] This mode matches any vowel character, but can only represent one character. The font size can be used to indicate the range of a character, for example: [A-z] // Match all lowercase letters A-Z // Match all uppercase letters [A-zA-Z] // Match all letters [0-9] // M

Background: In our computer, images are displayed in rgb888 format. Each pixel of the 24-Bit Bitmap stores 32-bit data, that is, rgb888 + Alpha, and Alpha is a translucent padding Byte ...... However, for a true color image, it is difficult for the naked eye to distinguish between 16 bits. Therefore, in some cases, rgb888 can be converted to rgb565 for storage, which reduces the storage capacity, reduces the data size. When the backend is displayed, rgb565 is converted to rgb888 again to achieve

Static RoutingSet 5 U + G7 w6], W + W * m With the popularization of broadband access, many families and SmallEnterprises have established local networks to share broadband access. In addition, with the expansion of the LAN, the applications of two or more routers are involved in many areas. When there are more than two routers in a LAN, you often need to set up routes because of the mutual access between hosts. Large network scale SmallAnd does not c

more liberal way of describing the pattern we want, it's a character cluster. To create a character cluster that represents all the vowel characters, put all the vowel characters in one square bracket: [Aaeeiioouu] This pattern matches any vowel character, but can only represent one character. A hyphen can represent a range of characters, such as: [A-z]//Match all lowercase letters [a-z]//Match all uppercase letters [A-ZA-Z]//matching all letters [0-9]//Match all numbers [0-9\.\-]//Match

Note the recent development of mobile hybrid applications, a problem encountered: Android cannot be displayed correctly according to the specified response style. First of all, two times you've encountered this problem:1. When using the jquery Mobile Write interface, the font and interface on the test machine (G7) are smaller.2. There is no problem with the layout of the custom response style on the G7, an

\r\t\n]//Match all white characters the same, these also represent only one character, which is a very important one. If you want to match a string consisting of a lowercase letter and a single digit, such as"Z2", "T6" or "G7", but not "ab2", "r2d3", or "B52", use this mode: ^[a-z][0-9]$ Although [A-z] represents a range of 26 letters, here it can only match a string with the first character being a lowercase letter. The previous mention of ^ represen

one. If you want to match a string consisting of a lowercase and a digit, such as "Z2", "T6" or "G7", but not "ab2", "r2d3" or "B52", use this pattern: ^[a-z][0-9]$ Although [A-z] represents a 26-letter range, it can only match a string with the first character being a lowercase letter. The previous reference to ^ represents the beginning of a string, but it has another meaning. When used in a set of square brackets, it denotes the meaning of "non" o

numbers [0-9\.\-]//Match all numbers, periods and minus signs [\f\r\t\n]//Match all white characters Similarly, these also represent only one character, which is a very important one. If you want to match a string consisting of a lowercase and a digit, such as "Z2", "T6" or "G7", but not "ab2", "r2d3" or "B52", use this pattern: ^[a-z][0-9]$ Although [A-z] represents a 26-letter range, it can only match a string with the first character being a lo

submits a form, it is not enough to determine whether the phone number, address, email address, credit card number, etc. are valid, and the usual literal characters are not sufficient. So to use a more liberal way of describing the pattern we want, it's a character cluster. To create a character cluster that represents all the vowel characters, put all the vowel characters in one square bracket: [Aaeeiioouu] This pattern matches any vowel character, but can only represent one character. A hy

. Size of individual elements: bytes rather than bits, such as reading an int data is 4 bytes3. Number of bytes read (count)4. File pointers for data (stream)Return value: Number of elements read =========================rgb=============================== Conversion of 24bit RGB888-> 16bit RGB565 24IBT RGB888 R7 R6 R5 R4 R3 R2 R1 R0 G7 G6 G5 G4 G3 G2 G1 G0 B7 B6 B5 B4 B3 B2 B1 B0 16bit RGB656 R7 R6 R5 R4 R3 G7