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- '\" $Header: /user6/ouster/tcl/man/RCS/array.n,v 1.1 93/04/14 16:52:55 ouster Exp $ SPRITE (Berkeley)
- '\"
- .so man.macros
- .HS array tcl
- .BS
- '\" Note: do not modify the .SH NAME line immediately below!
- .SH NAME
- array \- Manipulate array variables
- .SH SYNOPSIS
- \fBarray \fIoption arrayName\fR ?\fIarg arg ...\fR?
- .BE
-
- .SH DESCRIPTION
- .PP
- This command performs one of several operations on the
- variable given by \fIarrayName\fR.
- \fIArrayName\fR must be the name of an existing array variable.
- The \fIoption\fR argument determines what action is carried
- out by the command.
- The legal \fIoptions\fR (which may be abbreviated) are:
- .TP
- \fBarray anymore \fIarrayName searchId\fR
- Returns 1 if there are any more elements left to be processed
- in an array search, 0 if all elements have already been
- returned.
- \fISearchId\fR indicates which search on \fIarrayName\fR to
- check, and must have been the return value from a previous
- invocation of \fBarray startsearch\fR.
- This option is particularly useful if an array has an element
- with an empty name, since the return value from
- \fBarray nextelement\fR won't indicate whether the search
- has been completed.
- .TP
- \fBarray donesearch \fIarrayName searchId\fR
- This command terminates an array search and destroys all the
- state associated with that search. \fISearchId\fR indicates
- which search on \fIarrayName\fR to destroy, and must have
- been the return value from a previous invocation of
- \fBarray startsearch\fR. Returns an empty string.
- .TP
- \fBarray names \fIarrayName\fR
- Returns a list containing the names of all of the elements in
- the array.
- If there are no elements in the array then an empty string is
- returned.
- .TP
- \fBarray nextelement \fIarrayName searchId\fR
- Returns the name of the next element in \fIarrayName\fR, or
- an empty string if all elements of \fIarrayName\fR have
- already been returned in this search. The \fIsearchId\fR
- argument identifies the search, and must have
- been the return value of an \fBarray startsearch\fR command.
- Warning: if elements are added to or deleted from the array,
- then all searches are automatically terminated just as if
- \fBarray donesearch\fR had been invoked; this will cause
- \fBarray nextelement\fR operations to fail for those searches.
- .TP
- \fBarray size \fIarrayName\fR
- Returns a decimal string giving the number of elements in the
- array.
- .TP
- \fBarray startsearch \fIarrayName\fR
- This command initializes an element-by-element search through the
- array given by \fIarrayName\fR, such that invocations of the
- \fBarray nextelement\fR command will return the names of the
- individual elements in the array.
- When the search has been completed, the \fBarray donesearch\fR
- command should be invoked.
- The return value is a
- search identifier that must be used in \fBarray nextelement\fR
- and \fBarray donesearch\fR commands; it allows multiple
- searches to be underway simultaneously for the same array.
-
- .SH KEYWORDS
- array, element names, search
-