Table of Contents
These are the commands which modify a string. Note that none of these modify the string in place. In all cases a new string is returned.
string tolower stringReturns
string with all the letters
converted from upper to lower case.
string toupper stringReturns
string with all the letters
converted from lower to upper case.
string trim string ?trimChars?Returns
string with all occurrences of
trimChars removed from both ends. By
default
trimChars are whitespace (spaces,
tabs, newlines). Note that the characters are not treated as a
"block" of characters - in other words,
string trim "davidw"
dw would return the string
avi and not
davi.
string trimleft string
?trimChars?Returns
string with all occurrences of
trimChars removed from the left. By
default
trimChars are whitespace (spaces,
tabs, newlines)
string trimright string
?trimChars?Returns
string with all occurrences of
trimChars removed from the right. By
default
trimChars are whitespace (spaces,
tabs, newlines)
format formatString ?arg1 arg2 ...
argN?Returns a string formatted in the same manner as the ANSI
sprintf procedure. FormatString is a description of the formatting to
use. The full definition of this protocol is in the format man page. A useful subset of the definition
is that formatString consists of literal
words, backslash sequences, and %
fields. The % fields are
strings which start with a % and end
with one of:
s... Data is a string
d... Data is a decimal
integer
x... Data is a hexadecimal
integer
o... Data is an octal integer
f... Data is a floating point
number
The % may be followed by:
-... Left justify the data in this
field
+... Right justify the data in
this field
The justification value may be followed by a number giving the minimum number of spaces to use for the data.