1) In a Web
site, a trap is a page that does not allow the reader to back up a previous page (the Back
button on the toolbar is inoperable). A few Web site creators apparently use this technique to hold
the reader and force them to read the page or to encourage them to visit other pages on their site.
To exit a trap, the reader must either close the browser and open it again or enter a URL on the
address line. Traps are highly unpopular among Web users.
2) In assembler
language programming, a trap is a place in a program for handling unexpected or unallowable
conditions - for example, by sending an error message to a log or to a program user. If a return
code from another program were being checked by a calling program, a return code value that was
unexpected and unplanned for could cause a branch to a trap that recorded the situation and took
other appropriate action.
This was last updated in September 2005
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