Posix Character Sets difference between [[:blank:]] and [[:space:]]?
Clash Royale CLAN TAG#URR8PPP
2
On this website it says:
[[:blank:]] space and tab characters
[[:space:]] whitespace characters
What's the difference between space and tab characters and whitespace characters? To me, they almost seem the same.
sed regular-expression posix whitespace
edited Mar 20 '17 at 23:47
Gilles
527k12810561581
asked Mar 20 '17 at 15:40
14wml
11815
add a comment |
2
On this website it says:
[[:blank:]] space and tab characters
[[:space:]] whitespace characters
What's the difference between space and tab characters and whitespace characters? To me, they almost seem the same.
sed regular-expression posix whitespace
edited Mar 20 '17 at 23:47
Gilles
527k12810561581
asked Mar 20 '17 at 15:40
14wml
11815
add a comment |
2
2
2
On this website it says:
[[:blank:]] space and tab characters
[[:space:]] whitespace characters
What's the difference between space and tab characters and whitespace characters? To me, they almost seem the same.
sed regular-expression posix whitespace
edited Mar 20 '17 at 23:47
Gilles
527k12810561581
asked Mar 20 '17 at 15:40
14wml
11815
On this website it says:
[[:blank:]] space and tab characters
[[:space:]] whitespace characters
What's the difference between space and tab characters and whitespace characters? To me, they almost seem the same.
sed regular-expression posix whitespace
sed regular-expression posix whitespace
edited Mar 20 '17 at 23:47
Gilles
527k12810561581
asked Mar 20 '17 at 15:40
14wml
11815
edited Mar 20 '17 at 23:47
Gilles
527k12810561581
asked Mar 20 '17 at 15:40
14wml
11815
edited Mar 20 '17 at 23:47
Gilles
527k12810561581
edited Mar 20 '17 at 23:47
Gilles
527k12810561581
edited Mar 20 '17 at 23:47
Gilles
527k12810561581
527k12810561581
asked Mar 20 '17 at 15:40
14wml
11815
asked Mar 20 '17 at 15:40
14wml
11815
asked Mar 20 '17 at 15:40
14wml
11815
11815
add a comment |
add a comment |
1 Answer
1
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oldest
votes
7
The [[:space:]] class is a superset of [[:blank:]] which additionally (apart from the space and tab of [[:blank:]]) includes
- the newline character (
n, line feed on Unix, ASCII code 10), - vertical tab (
v, ASCII code 11), - form feed (
f, ASCII code 12), and - carriage return (
r, ASCII code 13).
... in the POSIX locale, that is. Other locales may have additional space characters.
answered Mar 20 '17 at 15:45
Kusalananda
121k16229372
IOW,[[:blank:]]is horizontal spacing characters only while[[:space:]]contains all horizontal and vertical spacing characters. See alsohvssinperlregular expressions.
– Stéphane Chazelas
Mar 20 '17 at 16:23
@StéphaneChazelas Isra vertical spacing character?
– Kusalananda
Mar 20 '17 at 16:25
1
Except for the space character, the[[:space:]]characters in the POSIX locale are all control characters, so the behaviour will vary with the device they are sent to. CR moves the cursor/carriage back to the start of the screen/page so on its own is not really a vertical spacing character, but it's part of the CRLF sequence that is sent to ttys for a line-break so as such can be seen as vertical spacing.
– Stéphane Chazelas
Mar 20 '17 at 16:35
1
Note that POSIX requires[[:space:]]to be a superset of[[:blank:]](in any locale). pubs.opengroup.org/onlinepubs/9699919799/basedefs/…
– Stéphane Chazelas
Mar 20 '17 at 16:37
add a comment |
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1 Answer
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1 Answer
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active
oldest
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oldest
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active
oldest
votes
7
The [[:space:]] class is a superset of [[:blank:]] which additionally (apart from the space and tab of [[:blank:]]) includes
- the newline character (
n, line feed on Unix, ASCII code 10), - vertical tab (
v, ASCII code 11), - form feed (
f, ASCII code 12), and - carriage return (
r, ASCII code 13).
... in the POSIX locale, that is. Other locales may have additional space characters.
answered Mar 20 '17 at 15:45
Kusalananda
121k16229372
IOW,[[:blank:]]is horizontal spacing characters only while[[:space:]]contains all horizontal and vertical spacing characters. See alsohvssinperlregular expressions.
– Stéphane Chazelas
Mar 20 '17 at 16:23
@StéphaneChazelas Isra vertical spacing character?
– Kusalananda
Mar 20 '17 at 16:25
1
Except for the space character, the[[:space:]]characters in the POSIX locale are all control characters, so the behaviour will vary with the device they are sent to. CR moves the cursor/carriage back to the start of the screen/page so on its own is not really a vertical spacing character, but it's part of the CRLF sequence that is sent to ttys for a line-break so as such can be seen as vertical spacing.
– Stéphane Chazelas
Mar 20 '17 at 16:35
1
Note that POSIX requires[[:space:]]to be a superset of[[:blank:]](in any locale). pubs.opengroup.org/onlinepubs/9699919799/basedefs/…
– Stéphane Chazelas
Mar 20 '17 at 16:37
add a comment |
7
The [[:space:]] class is a superset of [[:blank:]] which additionally (apart from the space and tab of [[:blank:]]) includes
- the newline character (
n, line feed on Unix, ASCII code 10), - vertical tab (
v, ASCII code 11), - form feed (
f, ASCII code 12), and - carriage return (
r, ASCII code 13).
... in the POSIX locale, that is. Other locales may have additional space characters.
answered Mar 20 '17 at 15:45
Kusalananda
121k16229372
IOW,[[:blank:]]is horizontal spacing characters only while[[:space:]]contains all horizontal and vertical spacing characters. See alsohvssinperlregular expressions.
– Stéphane Chazelas
Mar 20 '17 at 16:23
@StéphaneChazelas Isra vertical spacing character?
– Kusalananda
Mar 20 '17 at 16:25
1
Except for the space character, the[[:space:]]characters in the POSIX locale are all control characters, so the behaviour will vary with the device they are sent to. CR moves the cursor/carriage back to the start of the screen/page so on its own is not really a vertical spacing character, but it's part of the CRLF sequence that is sent to ttys for a line-break so as such can be seen as vertical spacing.
– Stéphane Chazelas
Mar 20 '17 at 16:35
1
Note that POSIX requires[[:space:]]to be a superset of[[:blank:]](in any locale). pubs.opengroup.org/onlinepubs/9699919799/basedefs/…
– Stéphane Chazelas
Mar 20 '17 at 16:37
add a comment |
7
7
7
The [[:space:]] class is a superset of [[:blank:]] which additionally (apart from the space and tab of [[:blank:]]) includes
- the newline character (
n, line feed on Unix, ASCII code 10), - vertical tab (
v, ASCII code 11), - form feed (
f, ASCII code 12), and - carriage return (
r, ASCII code 13).
... in the POSIX locale, that is. Other locales may have additional space characters.
answered Mar 20 '17 at 15:45
Kusalananda
121k16229372
The [[:space:]] class is a superset of [[:blank:]] which additionally (apart from the space and tab of [[:blank:]]) includes
- the newline character (
n, line feed on Unix, ASCII code 10), - vertical tab (
v, ASCII code 11), - form feed (
f, ASCII code 12), and - carriage return (
r, ASCII code 13).
... in the POSIX locale, that is. Other locales may have additional space characters.
answered Mar 20 '17 at 15:45
Kusalananda
121k16229372
edited Dec 15 at 23:06
answered Mar 20 '17 at 15:45
Kusalananda
121k16229372
answered Mar 20 '17 at 15:45
Kusalananda
121k16229372
answered Mar 20 '17 at 15:45
Kusalananda
121k16229372
121k16229372
IOW,[[:blank:]]is horizontal spacing characters only while[[:space:]]contains all horizontal and vertical spacing characters. See alsohvssinperlregular expressions.
– Stéphane Chazelas
Mar 20 '17 at 16:23
@StéphaneChazelas Isra vertical spacing character?
– Kusalananda
Mar 20 '17 at 16:25
1
Except for the space character, the[[:space:]]characters in the POSIX locale are all control characters, so the behaviour will vary with the device they are sent to. CR moves the cursor/carriage back to the start of the screen/page so on its own is not really a vertical spacing character, but it's part of the CRLF sequence that is sent to ttys for a line-break so as such can be seen as vertical spacing.
– Stéphane Chazelas
Mar 20 '17 at 16:35
1
Note that POSIX requires[[:space:]]to be a superset of[[:blank:]](in any locale). pubs.opengroup.org/onlinepubs/9699919799/basedefs/…
– Stéphane Chazelas
Mar 20 '17 at 16:37
add a comment |
IOW,[[:blank:]]is horizontal spacing characters only while[[:space:]]contains all horizontal and vertical spacing characters. See alsohvssinperlregular expressions.
– Stéphane Chazelas
Mar 20 '17 at 16:23
@StéphaneChazelas Isra vertical spacing character?
– Kusalananda
Mar 20 '17 at 16:25
1
Except for the space character, the[[:space:]]characters in the POSIX locale are all control characters, so the behaviour will vary with the device they are sent to. CR moves the cursor/carriage back to the start of the screen/page so on its own is not really a vertical spacing character, but it's part of the CRLF sequence that is sent to ttys for a line-break so as such can be seen as vertical spacing.
– Stéphane Chazelas
Mar 20 '17 at 16:35
1
Note that POSIX requires[[:space:]]to be a superset of[[:blank:]](in any locale). pubs.opengroup.org/onlinepubs/9699919799/basedefs/…
– Stéphane Chazelas
Mar 20 '17 at 16:37
IOW,
[[:blank:]] is horizontal spacing characters only while [[:space:]] contains all horizontal and vertical spacing characters. See also h vs s in perl regular expressions.– Stéphane Chazelas
Mar 20 '17 at 16:23
IOW,
[[:blank:]] is horizontal spacing characters only while [[:space:]] contains all horizontal and vertical spacing characters. See also h vs s in perl regular expressions.– Stéphane Chazelas
Mar 20 '17 at 16:23
@StéphaneChazelas Is
r a vertical spacing character?– Kusalananda
Mar 20 '17 at 16:25
@StéphaneChazelas Is
r a vertical spacing character?– Kusalananda
Mar 20 '17 at 16:25
1
1
Except for the space character, the
[[:space:]] characters in the POSIX locale are all control characters, so the behaviour will vary with the device they are sent to. CR moves the cursor/carriage back to the start of the screen/page so on its own is not really a vertical spacing character, but it's part of the CRLF sequence that is sent to ttys for a line-break so as such can be seen as vertical spacing.– Stéphane Chazelas
Mar 20 '17 at 16:35
Except for the space character, the
[[:space:]] characters in the POSIX locale are all control characters, so the behaviour will vary with the device they are sent to. CR moves the cursor/carriage back to the start of the screen/page so on its own is not really a vertical spacing character, but it's part of the CRLF sequence that is sent to ttys for a line-break so as such can be seen as vertical spacing.– Stéphane Chazelas
Mar 20 '17 at 16:35
1
1
Note that POSIX requires
[[:space:]] to be a superset of [[:blank:]] (in any locale). pubs.opengroup.org/onlinepubs/9699919799/basedefs/…– Stéphane Chazelas
Mar 20 '17 at 16:37
Note that POSIX requires
[[:space:]] to be a superset of [[:blank:]] (in any locale). pubs.opengroup.org/onlinepubs/9699919799/basedefs/…– Stéphane Chazelas
Mar 20 '17 at 16:37
add a comment |
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