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Lists can be searched with the lsearch command, sorted with the lsort command, and a range of list entries can be extracted with the lrange command.

lsearch list pattern

searches list for an entry that matches pattern, and returns the index for the first match, or a -1 if there is no match.

lsort list

sorts list and returns a new list in the sorted order. By default, it sorts the list into alphabetic order.

lrange list first last

returns a list composed of the first through last entries in the list. If first is less than or equal to 0, it is treated as the first list element. If last is end or a value greater than the number of elements in the list, it is treated as the end. If first is greater than last then an empty list is returned.

By default, lsearch uses the globbing method of finding a match. Globbing is the wildcarding technique that most Unix shells use.

globbing wildcards are:

*

Matches any quantity of any character

?

Matches one occurrence of any character

\X

The backslash escapes a special character in globbing just the way it does in Tcl substitutions. Using the backslash lets you use glob to match a * or ?.

[...]

Matches one occurrence of any character within the brackets. A range of characters can be matched by using a range between the brackets. For example, [a-z] will match any lower case letter.

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