backslash not last character on line

1 used in the macro definition: #define CV_ARE_SIZES_EQ (MAT1, mat2) \ ((mat1)->rows = = (MAT2)->rows && (mat1)->cols = = (MAT2)-> Cols 2 used in printf, sometimes the statement in printf is too long, need to be split, then use the

Characters Meaning: For a character, it is usually indicated by literal meaning that the character followed by a special character is not interpreted. For example:/b/matches the character ' B ', which becomes a special character by adding a

Differences from Perl PCRE function PCRE Patterns PHP manual Schema Syntax (No version information available, might only being in SVN) Schema syntax-syntax explanation for Perl compatible regular expressions The PCRE library is a set of functions

When there is too much code in your code, it is especially inconvenient to read the code, and you need to use a newline character "\". Be aware of two points when using line breaks: The 1.c compiler is based on ";" To determine if it is a statement,

How Linux displays a few lines of a file (in the middle of a few lines)"One" starts at line No. 3000 and displays 1000 rows. The 3000~3999 line is displayedCat FileName | Tail-n +3000 | Head-n 1000"Two" displays 1000 rows to 3000 rowsCat FileName |

Special characters in PHP regular expressions. Character meaning: for a character, it usually indicates the literal meaning, indicating that the subsequent character is a special character, not interpreted. For example, B matches the character 'B'

sed (stream editor) Function Description: Use script to process text files.Syntax: sed [-hnv][-e][-f][text file]Additional Note: SED can process and edit text files according to script instructions.Parameters:-e or--expression= the input text file

English title: Useful one-line SCRIPTS for SED (Unix stream editor)Original title: HANDY one-liners for SED (Unix stream editor) Finishing: Eric pement-e-mail: pemente[at]northpark[dot]edu version 5.5Translator: Joe-e-mail: hq00e[at]126[dot]com The

By its very nature, a regular expression (or RE) is a small, highly specialized programming language that is embedded in Python and implemented through the RE module. With this small language, you can specify rules for the set of strings that you

CharactersMeaning: For a character, it is usually expressed as literal meaning that the next character is a special character and is not interpreted.For example:/b/matches the character ' B ', by adding a backslash in front of B, which is/b/, the