By Don Libes

ISBN-10: 1565920902

ISBN-13: 9781565920903

Anticipate is instantly turning into part of each UNIX user's toolbox. It permits you to automate Telnet, FTP, passwd, rlogin, and thousands of different functions that generally require human interplay. utilizing anticipate to automate those purposes will let you accelerate initiatives and, in lots of situations, remedy new difficulties that you just by no means may have even thought of earlier than. for instance, you should use count on to check interactive courses with out alterations to their interfaces. Or wrap interactive courses with Motif-like front-ends to manage purposes via buttons, scrollbars, and different photo components without recompilation of the unique courses. you do not even desire the resource code! anticipate works with distant purposes, too. Use it to tie jointly net purposes together with Telnet, Archie, FTP, Gopher, and Mosaic. Don Libes is the writer of anticipate in addition to the writer of this booklet. In Exploring anticipate, he presents a accomplished educational on all of Expect's positive factors, permitting you to place it instantly to paintings in your difficulties. In a down-to-earth and funny type, he offers various examples of difficult real-world functions and the way they are often automatic utilizing count on to avoid wasting you money and time. anticipate is the 1st of a brand new breed of courses in accordance with Tcl, the instrument Command Language that's rocking the pc technology neighborhood. This publication offers an advent to Tcl and describes how count on applies Tcl's energy to the hot box of interplay automation. no matter if your curiosity is in anticipate or interplay automation otherwise you easily are looking to know about Tcl and spot the way it has been utilized in actual software program, you'll find Exploring anticipate a treasure trove of easy-to-understand and useful details.

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Extra resources for Exploring Expect (Nutshell Handbooks)

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By default, it sorts in increasing ASCII order. tclsh> lsort {one two three four five six} five four one six three two Several flags are available including -integer, -real, and -decreasing to sort in ways suggested by their names. It is also possible to supply lsort with a comparison procedure of your own. This is useful for lists with elements that are lists in themselves. [#] [#] Alternatively, you can write your own Tcl command to do this in C, C++, or any other faster language. 11. The split And join Commands The split and joincommands are useful for splitting strings into lists, and vice versa —joining lists into strings.

The lreplace Command The lreplace command is similar to the linsert command except that lreplace deletes existing elements before inserting the new ones. The second and third arguments identify the beginning and ending indices of the elements to be deleted, and the remaining arguments are inserted in their place. 9. The lsearch Command The lsearch command is the opposite of the lindex command. The lsearch command returns the index of the first occurrence of an element in a list. If the element does not exist, -1 is returned.

Tclsh> set a "foo bar \"hello\"" foo bar "hello" tclsh> set b "gorp" gorp tclsh> set ab "$a $b" foo bar "hello" gorp tclsh> llength $ab 4 ;# WRONG In contrast, the list command correctly preserves the embedded lists. The list command also correctly handles things such as escaped braces and quotes. If you want to append several lists together, use the concat command. tclsh> concat a b "Hello world" a b Hello world The concat command treats each of its arguments as a list. The elements of all of the lists are then returned in a new list.

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Exploring Expect (Nutshell Handbooks) by Don Libes

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