Proceeding to the search string issue in find - China DOS Union Forum

Originally posted by YoDe at 2008-7-15 22:36:
\< represents the front boundary of a word, and \> represents the back boundary of a word. As for this sentence, I can't understand it.

Let's give a simple example!

For example, there is a string now, excluding the square brackets on both sides, then
"\<it" can match the word "is" after "this", but the "is" contained in the word "this" cannot be matched, because the "\<" symbol in the expression "\<it" requires that the left side of this "it" is a space or other characters, not letters, underscores, and any characters that make up a word. So the "is" in "this" cannot match the expression. \< only represents a position, where the front is a non-word character and the back is a word character, and \> is the opposite of it.

What are word characters?
a-z, A-Z, _, 0-9 can all be characters that make up a word, and others are not word characters. For example, symbols ~!@#$%^&*()_+... These are not.

You can search for articles about regular expressions on the Internet.

Floor16　lxmxn	Posted 2008-07-17 10:50
版主　Posts 4,938　Credits 11,386
Originally posted by YoDe at 2008-7-15 22:36: \< represents the front boundary of a word, and \> represents the back boundary of a word. As for this sentence, I can't understand it. Let's give a simple example! For example, there is a string now, excluding the square brackets on both sides, then "\<it" can match the word "is" after "this", but the "is" contained in the word "this" cannot be matched, because the "\<" symbol in the expression "\<it" requires that the left side of this "it" is a space or other characters, not letters, underscores, and any characters that make up a word. So the "is" in "this" cannot match the expression. \< only represents a position, where the front is a non-word character and the back is a word character, and \> is the opposite of it. What are word characters? a-z, A-Z, _, 0-9 can all be characters that make up a word, and others are not word characters. For example, symbols ~!@#$%^&*()_+... These are not. You can search for articles about regular expressions on the Internet.

Floor17　YoDe	Posted 2008-07-19 01:42
中级用户　Posts 102　Credits 224
Thanks moderator, I'll read more relevant information online by myself

Floor18　zhouhuang	Posted 2008-07-19 15:08
初级用户　Posts 28　Credits 56
Bump