what escape sequence

PHP inherits *nix's consistent tradition of fully supporting formal expression processing. Regular expressions provide an advanced, but not intuitive, method for string matching and processing. Friends who have used regular expressions in Perl know

This document describes the configuration of the PPP Protocol's PAP and CHAP authentication on Cisco routers, and the simple commands involved in the configuration are no longer repeated in the comments ... Figure 1 First,

Regular PHP inherits *nix's consistent tradition of fully supporting the processing of regular expressions. Regular expressions provide an advanced, but not intuitive, method for string matching and processing. Friends who have used regular

In a string, some sequences have special meanings. These sequences begin with a backslash (' \ '), the so-called escape character . MySQL recognizes the following escape sequences: NUL ASCII 0 () characters.

All messages sent by the PostgreSQL server are given a five-character error code that follows the custom of the SQL "SQLSTATE" code. Apps that need to know what error conditions are occurring should usually test the error code instead of the text

Detailed descriptions of Linux directories and each directory, including common directories such as/BIN,/ETC,/HOME,/USR,/ROOT,/DEV,/VAR,/PROC, which are common in Linux, are detailed and explained.Linux Common Directory Description/binStoring binary

Experimental 1:cisco Router base configuration1. Operating mode of the router:Router> user mode, typically used to view statistics, but cannot modify the router's settings.router# Concession mode, you can view and modify the configuration of the

Recently do Android development, Android client Call Server page, but the server code for GBK, Android code for Utf-8, resulting in JS output error, the previous practice is to adjust the JS file encoding, but will generate two versions, very

The character meaning \ is used as a conversion, that is, the characters After & quot ;\& quot; do not follow the original meaning, for example, B matches the character & quot; B & quot ;, when B is preceded by a vertical bar and \ B, it is

Global debugging When configuring a Cisco router, the boundaries between global and interface commands are obvious. In this case, we use "Global" to identify commands that cannot be used for interface debugging or specific transmission media types

Meaning of linux folders (the most complete version)/bin: where binary programs live. /boot: the special programs that start the system when you turn the machine on. /dev: aaaaaalll the "device" listings for hardware of every concievable flavor,

Escape () method In the MSDN JScript Reference: The escape method returns a string value (in Unicode format) that contains the contents of [the argument]. all spaces, punctuation, accented characters, and any other non-ASCII characters are replaced

Escape (), encodeURI () and encodeURIComponent () are three common methods used to encode strings in Javascript, but their similarities and differences have plagued many Javascript beginners, today, I will analyze and compare these three methods in

When echo outputs the color, use the echo-e format: echo-e \ 033 [background color; Font color m, for example, echo-e \ 033 [32; in the above command, \ 033 [32; 40 m indicates defining the color of the subsequent text, \ 033 indicates starting an

/Bin binary executable command/dev device Special file/etc system management and configuration file/etc/rc. d. start the configuration file and script/home user home directory base point. for example, if the user's home directory is/home/user, you

This article describes in detail the special meanings of the HTML Escape Character EscapeSequence HTML , and so on (, used for the link tag, & used for escape), and cannot be used directly. These symbols are not displayed on the webpage we finally

This article mainly introduces the differences between escape (), encodeURI (), and encodeURIComponent (). For more information, see the following three functions in JavaScript that can encode strings: escape, encodeURI, and encodeURIComponent.

If you do not configure a vro, you can connect multiple network segments. Specifically for the following situations:1. As the network becomes more complex, the Local Area Network is a network segment. Later, multiple network segments were divided as

Lab requirements:Set up the topology, import the pre-configuration, and troubleshoot the following errors.1. The link between R1 and SW1 cannot start;2. SW1 cannot start the trunk link between SW2 and SW3;3. Problems with etherchannel between SW2

I saw the following topic and asked which route was chosen when R4 arrived at R2. At that time, I was not sure. So I designed this topology to prove it and finally proved my conclusion. If the COST of R2. In this topology, there is no difference