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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.	  This option is only meaningful when used with -exact
	      or -sorted.

       -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)
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