Practical Programming in Tcl and Tk, Fourth Edition

Chapter 5. Tcl Lists

This chapter describes Tcl lists. Tcl commands described are: list, lindex, llength, lrange, lappend, linsert, lreplace, lsearch, lset, lsort, concat, join, and split.

Lists in Tcl have the same structure as Tcl commands. All the rules you learned about grouping arguments in Chapter 1 apply to creating valid Tcl lists. However, when you work with Tcl lists, it is best to think of lists in terms of operations instead of syntax. Tcl commands provide operations to put values into a list, get elements from lists, count the elements of lists, replace elements of lists, and so on. It is a good habit to use commands like list and lappend to construct lists, instead of creating them by hand. Lists are used with commands such as foreach ...