j***y
发帖数: 2074 | 1 what's the meaning the following expression?
vi load_image.sh
pls be as detailed as possible, thanks, | T********r
发帖数: 6210 | 2
1,$: from the first line of the file to the last line
s: find some matching pattern, and replace with another pattern
/: begin the matching pattern
.: match any character
*: match any number of characters, i.e., 0 - any characters
/: end of the matching pattern, begin the replacing pattern
.\/load_image.pl Image\/: replacing pattern is ./load_image.pl Image/
note the difference between a single '/' and '\/'. for '/', it is
the delimit character between patterns. for '\/', it represents th
【在 j***y 的大作中提到】
: what's the meaning the following expression?
: vi load_image.sh
: pls be as detailed as possible, thanks,
| j***y
发帖数: 2074 | 3
I find this is the most difficult part. All others I can understand.
So with "&" present, the effect is to insert the string "./load_image.pl
Image/" in the beginning of every line in the file, coz "&" tells it not to
match anything, right?
【在 T********r 的大作中提到】
:
: 1,$: from the first line of the file to the last line
: s: find some matching pattern, and replace with another pattern
: /: begin the matching pattern
: .: match any character
: *: match any number of characters, i.e., 0 - any characters
: /: end of the matching pattern, begin the replacing pattern
: .\/load_image.pl Image\/: replacing pattern is ./load_image.pl Image/
: note the difference between a single '/' and '\/'. for '/', it is
: the delimit character between patterns. for '\/', it represents th
| T********r
发帖数: 6210 | 4
frankly speaking, I do not know the meaning of & either. just made a guess
here, hehe. ok, my guess might be wrong. & probably means the matched
pattern. check the following link:
http://www.unicode.org/reports/tr18/
【在 j***y 的大作中提到】
:
: I find this is the most difficult part. All others I can understand.
: So with "&" present, the effect is to insert the string "./load_image.pl
: Image/" in the beginning of every line in the file, coz "&" tells it not to
: match anything, right?
| j***y
发帖数: 2074 | 5
Yes, you are right on this point.
http://www.cis.tugraz.at/zid/peter/unix/regular.html
【在 T********r 的大作中提到】
:
: frankly speaking, I do not know the meaning of & either. just made a guess
: here, hehe. ok, my guess might be wrong. & probably means the matched
: pattern. check the following link:
: http://www.unicode.org/reports/tr18/
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