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lsearch(n) Tcl Built-In Commands lsearch(n)
______________________________________________________________________________
NAME
lsearch - See if a list contains a particular element
SYNOPSIS
lsearch ?options? list pattern
_________________________________________________________________
DESCRIPTION
This command searches the elements of list to see if one of them
matches pattern. If so, the command returns the index of the first
matching element (unless the options -all or -inline are specified.) │
If not, the command returns -1. The option arguments indicates how the
elements of the list are to be matched against pattern and it must have
one of the following values:
-all Changes the result to be the list of all matching indices (or │
all matching values if -inline is specified as well.)
-ascii The list elements are to be examined as Unicode strings (the
name is for backward-compatability reasons.) This option is
only meaningful when used with -exact or -sorted.
-decreasing
The list elements are sorted in decreasing order. This option
is only meaningful when used with -sorted.
-dictionary
The list elements are to be compared using dictionary-style com-
parisons (see lsort for a fuller description). This option is
only meaningful when used with -exact or -sorted, and it is only
distinguishable from the -ascii option when the -sorted option
is given, because values are only dictionary-equal when exactly
equal.
-exact The list element must contain exactly the same string as pat-
tern.
-glob Pattern is a glob-style pattern which is matched against each
list element using the same rules as the string match command.
-increasing
The list elements are sorted in increasing order. This option
is only meaningful when used with -sorted.
-inline
The matching value is returned instead of its index (or an empty │
string if no value matches.) If -all is also specified, then │
the result of the command is the list of all values that │
matched.
-integer
The list elements are to be compared as integers. This option
is only meaningful when used with -exact or -sorted.
-not This negates the sense of the match, returning the index of the │
first non-matching value in the list.
-real The list elements are to be compared as floating-point values.
This option is only meaningful when used with -exact or -sorted.
-regexp
Pattern is treated as a regular expression and matched against
each list element using the rules described in the re_syntax
reference page.
-sorted
The list elements are in sorted order. If this option is speci-
fied, lsearch will use a more efficient searching algorithm to
search list. If no other options are specified, list is assumed
to be sorted in increasing order, and to contain ASCII strings.
This option is mutually exclusive with -glob and -regexp, and is
treated exactly like -exact when either -all, or -not is speci-
fied.
-start index
The list is searched starting at position index. If index has │
the value end, it refers to the last element in the list, and │
end-integer refers to the last element in the list minus the │
specified integer offset.
If option is omitted then it defaults to -glob. If more than one of
-exact, -glob, -regexp, and -sorted is specified, whichever option is
specified last takes precedence. If more than one of -ascii, -dictio-
nary, -integer and -real is specified, the option specified last takes
precedence. If more than one of -increasing and -decreasing is speci-
fied, the option specified last takes precedence.
EXAMPLES │
lsearch {a b c d e} c => 2 │
lsearch -all {a b c a b c} c => 2 5 │
lsearch -inline {a20 b35 c47} b* => b35 │
lsearch -inline -not {a20 b35 c47} b* => a20 │
lsearch -all -inline -not {a20 b35 c47} b* => a20 c47 │
lsearch -all -not {a20 b35 c47} b* => 0 2 │
lsearch -start 3 {a b c a b c} c => 5 │
SEE ALSO
foreach(n), list(n), lappend(n), lindex(n), linsert(n), llength(n), │
lset(n), lsort(n), lrange(n), lreplace(n)
KEYWORDS
list, match, pattern, regular expression, search, string
Tcl 8.4 lsearch(n)
Man(1) output converted with
man2html and wrapped by fishsponge
This page was generated on Sat Sep 8 16:41:05 GMT 2007
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