| ${#string} | Length of $string |
| | |
| ${string:position} | Extract substring from $string
at $position |
| ${string:position:length} | Extract $length
characters substring from $string
at $position |
| | |
| ${string#substring} | Strip shortest match of
$substring from front of
$string |
| ${string##substring} | Strip longest match of
$substring from front of
$string |
| ${string%substring} | Strip shortest match of
$substring from back of
$string |
| ${string%%substring} | Strip longest match of
$substring from back of
$string |
| | |
| ${string/substring/replacement} | Replace first match of
$substring with
$replacement |
| ${string//substring/replacement} | Replace all matches of
$substring with
$replacement |
| ${string/#substring/replacement} | If $substring
matches front end of
$string, substitute
$replacement for
$substring |
| ${string/%substring/replacement} | If $substring
matches back end of
$string, substitute
$replacement for
$substring |
| | |
| | |
| expr match "$string" '$substring' | Length of matching $substring*
at beginning of $string |
| expr "$string" : '$substring' | Length of matching $substring*
at beginning of $string |
| expr index "$string" $substring | Numerical position in $string
of first character in $substring
that matches |
| expr substr $string $position
$length | Extract $length characters
from $string starting at
$position |
| expr match "$string"
'\($substring\)' | Extract $substring* at
beginning of $string |
| expr "$string" :
'\($substring\)' | Extract $substring* at
beginning of $string |
| expr match "$string"
'.*\($substring\)' | Extract $substring* at
end of $string |
| expr "$string" :
'.*\($substring\)' | Extract $substring* at
end of $string |
