NAME
string - Manipulate strings
SYNOPSIS
string option arg ?arg ...?
DESCRIPTION
Performs one of several string operations, depending on option. The legal options (which may be abbreviated) are:
string compare string1 string2
Perform a character-by-character comparison of strings string1 and string2 in the same way as the C strcmp procedure. Return -1, 0, or 1, depending on whether string1 is lexicographically less than, equal to, or greater than string2.
string first string1 string2
Search string2 for a sequence of characters that exactly match the characters in string1. If found, return the index of the first character in the first such match within string2. If not found, return -1.
string index string charIndex
Returns the charIndex'th character of the string argument. A charIndex of 0 corresponds to the first character of the string. If charIndex is less than 0 or greater than or equal to the length of the string then an empty string is returned.
string last string1 string2
Search string2 for a sequence of characters that exactly match the characters in string1. If found, return the index of the first character in the last such match within string2. If there is no match, then return -1.
string length string
Returns a decimal string giving the number of characters in string.
string match pattern string
See if pattern matches string; return 1 if it does, 0 if it doesn't. Matching is done in a fashion similar to that used by the C-shell. For the two strings to match, their contents must be identical except that the following special sequences may appear in pattern:
string tolower string
Returns a value equal to string except that all upper case letters have been converted to lower case.
string toupper string
Returns a value equal to string except that all lower case letters have been converted to upper case.
string trim string ?chars?
Returns a value equal to string except that any leading or trailing characters from the set given by chars are removed. If chars is not specified then white space is removed (spaces, tabs, newlines, and carriage returns).
string trimleft string ?chars?
Returns a value equal to string except that any leading characters from the set given by chars are removed. If chars is not specified then white space is removed (spaces, tabs, newlines, and carriage returns).
string trimright string ?chars?
Returns a value equal to string except that any trailing characters from the set given by chars are removed. If chars is not specified then white space is removed (spaces, tabs, newlines, and carriage returns).
string wordend string index
Returns the index of the character just after the last one in the word containing character index of string. A word is considered to be any contiguous range of alphanumeric or underscore characters, or any single character other than these.
string wordstart string index
Returns the index of the first character in the word containing character index of string. A word is considered to be any contiguous range of alphanumeric or underscore characters, or any single character other than these.
KEYWORDS
case conversion, compare, index, match, pattern, string, word