Practical Programming in Tcl & Tk, Third Edition

Searching Lists: lsearch

lsearch returns the index of a value in the list, or -1 if it is not present. lsearch supports pattern matching in its search. Glob-style pattern matching is the default, and this can be disabled with the -exact flag. The semantics of glob pattern matching is described in Chapter 4. The -regexp option lets you specify the list value with a regular expression. Regular expressions are described in Chapter 11. In the following example, the glob pattern l* matches the value list.

lsearch {here is a list}l*
=> 3
					

Example 5-6 uses lreplace and lsearch to delete a list element by value. The value is found with lsearch. The value is removed with an lreplace that does not specify any replacement list elements:

Example 5-6 Deleting ...