November 1999
Intermediate to advanced
832 pages
19h 28m
English
Content preview from Practical Programming in Tcl & Tk, Third EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Interactive Command History
The Tcl shell programs keep a log of the commands that you type by using a history facility. The log is controlled and accessed via the history command. The history facility uses the term event to mean an entry in its history log. The events are just commands, and they have an event ID that is their index in the log. You can also specify an event with a negative index that counts backwards from the end of the log. Event -1 is the previous event. Table 13-5 summarizes the Tcl history command. In the table, event defaults to -1.
In practice you will want to take advantage of the ability to abbreviate the history options and even the name of the history command itself. For the command, you need to type a unique prefix, ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.