A very practical articleArticleFor character encoding, reprinted as a favorites.
-=== Reference original content ===-Author: Ruan YifengLink: http://www.ruanyifeng.com/blog/2007/10/ascii_unicode_and_utf-8.html
At noon today, I suddenly wanted to
Keyboard ASCII code Query
You can consider the ASCII code of F1 -- F12 in this way.The ASCII code of F1 is: 112, and then the ASCII code table of F2 -- F12 is obtained in
Currently, the most widely used character set and Its Encoding in computers are American Standard Code for information interchange (American Standard Code for information interchange) developed by the National Bureau of Standards (ANSI ), it has
In front of actually also talked about the ASCII, but not very specific, as a part of a complete series, or it is necessary to talk about, but also as a basis for discussion later. AsciiIts full name is american Standard Code for information
Miss Rice, today lectures on ASCII code, because this is the first time to contact the hardware input and output code, in order to understand, specifically summed up this code.
The most widely used character set and its encoding in the current
1. ASCII code
We know that inside a computer, all information is ultimately represented as a binary string. Each bits (bit) has 0 and 12 states, so eight bits can combine 256 states, which is called Byte. That is, a byte can be used to represent 256
English documents:
ascii(object)
repr()as, return a string containing a printable representation of an object, but escape the non-ascii characters in the S Tring returned repr() by using \x , \u or \U escapes. This generates a string similar to,
Php filters ascii control characters. Share the following method to filter ascii control characters in PHP. Import the data of other websites crawled to xml. The problem is that the webpage has ascII control characters. At first, we thought it was a
The functions of these two functions are exactly the opposite of the CHR function, which returns characters from the specified ASCII value and the Ord () function returns the ASCII value of the first character of the string. Understand that this
ArticleSource http://www.ruanyifeng.com/blog/2007/10/ascii_unicode_and_utf-8.html
At noon today, I suddenly wanted to figure out the relationship between Unicode and UTF-8, so I began to look up information online.
As a result, this problem
Character encoding is the cornerstone of computer technology. To be familiar with computers, you must understand a little bit about character encoding.
1. ASCII code
We know that in a computer, all information is eventually represented as a
At noon today, I suddenly wanted to figure out the relationship between Unicode and UTF-8, so I began to look up information online.
As a result, this problem is more complicated than I thought. After lunch, we can see that the problem is fixed at
From:
Http://www.ruanyifeng.com/blog/2007/10/ascii_unicode_and_utf-8.html
At noon today, I suddenly wanted to figure out the relationship between Unicode and UTF-8, so I began to look up information online.
As a result, this problem is more
1 ASCII codeThe relationship between English characters and bits is uniformly stipulated. The ASCII code altogether specifies a 128-character encoding. For example, the space "space" is 32 (binary 00100000), and capital A is 65 (binary 01000001).
ASCII code table and keyboard code table. It is useful for the sendmessage function.
ASCII code table
ASCII Value
Control characters
ASCII Value
Control characters
ASCII Value
Preface: Have been curious about this problem, but has not solved, today I finally understand, thank the big boys of Popular Science turn from: 794604851.ASCIIWe know that inside the computer, all information is ultimately a binary value. Each bits (
When doing dealspider, you must know the charset of the page, and then convert it into a UTF-8, and finally use the regular expression of glib for matching and search. Curl itself does not provide such a function. Previously, we saw the following in
I. general ASCII code table
Schematic ASCII code comparison tableTake character A as an example.Dec indicates decimal, such as 65Hx indicates hexadecimal, such as 41Oct indicates octal, for example, 101Char indicates the display character, such
The origin of ASCII codeAfter the invention of the computer, in order to represent characters in the computer, people developed an encoding called ASCII code. The ASCII code is represented by 7 bits (bit) in one byte, and the range is 0x00-0x7f a
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