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Full Discussion: Selecting lines of a file
Top Forums Shell Programming and Scripting Selecting lines of a file Post 302461274 by puttster on Saturday 9th of October 2010 06:00:14 PM
Old 10-09-2010
Why is it that when I do $RANDOM=variable and then when i try to echo out $RANDOM + 1 I just get the $variable + 1 and not a random number within $variable's limits?

Nevermind I answered my own question by setting a variable = to random and doing random %$variable+1

Last edited by puttster; 10-09-2010 at 07:13 PM..
 

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lrange(n)						       Tcl Built-In Commands							 lrange(n)

__________________________________________________________________________________________________________________________________________________

NAME
lrange - Return one or more adjacent elements from a list SYNOPSIS
lrange list first last _________________________________________________________________ DESCRIPTION
List must be a valid Tcl list. This command will return a new list consisting of elements first through last, inclusive. The index values | first and last are interpreted the same as index values for the command string index, supporting simple index arithmetic and indices rela- | tive to the end of the list. If first is less than zero, it is treated as if it were zero. If last is greater than or equal to the number of elements in the list, then it is treated as if it were end. If first is greater than last then an empty string is returned. Note: "lrange list first first" does not always produce the same result as "lindex list first" (although it often does for simple fields that are not enclosed in braces); it does, however, produce exactly the same results as "list [lindex list first]" EXAMPLES
Selecting the first two elements: % lrange {a b c d e} 0 1 a b Selecting the last three elements: % lrange {a b c d e} end-2 end c d e Selecting everything except the first and last element: % lrange {a b c d e} 1 end-1 b c d Selecting a single element with lrange is not the same as doing so with lindex: % set var {some {elements to} select} some {elements to} select % lindex $var 1 elements to % lrange $var 1 1 {elements to} SEE ALSO
list(n), lappend(n), lindex(n), linsert(n), llength(n), lsearch(n), lset(n), lreplace(n), lsort(n), string(n) | KEYWORDS
element, list, range, sublist Tcl 7.4 lrange(n)
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