Get all characters before first instance of another char
Clash Royale CLAN TAG#URR8PPP
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Say I have
npmv="3.4.5";
what is the simplest way to get all the characters before the first dot? In this case that would be "3"?
bash shell-script
asked Jun 22 at 7:32
Alexander Mills
1,848929
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up vote
0
down vote
favorite
Say I have
npmv="3.4.5";
what is the simplest way to get all the characters before the first dot? In this case that would be "3"?
bash shell-script
asked Jun 22 at 7:32
Alexander Mills
1,848929
add a comment |Â
up vote
0
down vote
favorite
up vote
0
down vote
favorite
Say I have
npmv="3.4.5";
what is the simplest way to get all the characters before the first dot? In this case that would be "3"?
bash shell-script
asked Jun 22 at 7:32
Alexander Mills
1,848929
Say I have
npmv="3.4.5";
what is the simplest way to get all the characters before the first dot? In this case that would be "3"?
bash shell-script
asked Jun 22 at 7:32
Alexander Mills
1,848929
asked Jun 22 at 7:32
Alexander Mills
1,848929
asked Jun 22 at 7:32
Alexander Mills
1,848929
asked Jun 22 at 7:32
Alexander Mills
1,848929
1,848929
add a comment |Â
add a comment |Â
1 Answer
1
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oldest
votes
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3
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npmv="3.4.5"
major=$npmv%%.*
printf 'The major version number is %sn' "$major"
The parameter substitution $variable%%pattern will remove the longest suffix string matching pattern from the value of $variable. The pattern is treated as a filename globbing pattern, not a regular expression. This is a standard parameter substitution that will work in all POSIX shells.
The same thing but with a single % would remove only the final .5 of the string in the example (the shortest matching suffix pattern). For prefix strings, use # instead of %.
See also the section on parameter expansions in the POSIX standard, and your shell's manual.
answered Jun 22 at 7:39
Kusalananda
101k13199312
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
3
down vote
accepted
npmv="3.4.5"
major=$npmv%%.*
printf 'The major version number is %sn' "$major"
The parameter substitution $variable%%pattern will remove the longest suffix string matching pattern from the value of $variable. The pattern is treated as a filename globbing pattern, not a regular expression. This is a standard parameter substitution that will work in all POSIX shells.
The same thing but with a single % would remove only the final .5 of the string in the example (the shortest matching suffix pattern). For prefix strings, use # instead of %.
See also the section on parameter expansions in the POSIX standard, and your shell's manual.
answered Jun 22 at 7:39
Kusalananda
101k13199312
add a comment |Â
up vote
3
down vote
accepted
npmv="3.4.5"
major=$npmv%%.*
printf 'The major version number is %sn' "$major"
The parameter substitution $variable%%pattern will remove the longest suffix string matching pattern from the value of $variable. The pattern is treated as a filename globbing pattern, not a regular expression. This is a standard parameter substitution that will work in all POSIX shells.
The same thing but with a single % would remove only the final .5 of the string in the example (the shortest matching suffix pattern). For prefix strings, use # instead of %.
See also the section on parameter expansions in the POSIX standard, and your shell's manual.
answered Jun 22 at 7:39
Kusalananda
101k13199312
add a comment |Â
up vote
3
down vote
accepted
up vote
3
down vote
accepted
npmv="3.4.5"
major=$npmv%%.*
printf 'The major version number is %sn' "$major"
The parameter substitution $variable%%pattern will remove the longest suffix string matching pattern from the value of $variable. The pattern is treated as a filename globbing pattern, not a regular expression. This is a standard parameter substitution that will work in all POSIX shells.
The same thing but with a single % would remove only the final .5 of the string in the example (the shortest matching suffix pattern). For prefix strings, use # instead of %.
See also the section on parameter expansions in the POSIX standard, and your shell's manual.
answered Jun 22 at 7:39
Kusalananda
101k13199312
npmv="3.4.5"
major=$npmv%%.*
printf 'The major version number is %sn' "$major"
The parameter substitution $variable%%pattern will remove the longest suffix string matching pattern from the value of $variable. The pattern is treated as a filename globbing pattern, not a regular expression. This is a standard parameter substitution that will work in all POSIX shells.
The same thing but with a single % would remove only the final .5 of the string in the example (the shortest matching suffix pattern). For prefix strings, use # instead of %.
See also the section on parameter expansions in the POSIX standard, and your shell's manual.
answered Jun 22 at 7:39
Kusalananda
101k13199312
edited Jun 22 at 7:45
answered Jun 22 at 7:39
Kusalananda
101k13199312
answered Jun 22 at 7:39
Kusalananda
101k13199312
answered Jun 22 at 7:39
Kusalananda
101k13199312
101k13199312
add a comment |Â
add a comment |Â
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