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LEARN ABOUT OPENDARWIN

lsearch

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 match-
       ing 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 mean-
	      ingful 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 comparisons.	This option is only meaningful when used  with	-exact	or
	      -sorted.

       -exact The list element must contain exactly the same string as pattern.

       -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  refer-
	      ence page.

       -sorted
	      The list elements are in sorted order.  If this option is specified, 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 specified.

       -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, -dictionary, -integer and -real is specified, the option specified last takes
       precedence.  If more than one of -increasing and -decreasing is specified, 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)