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TCl numeric list

TCl numeric list

(OP)
I need help with writing a procedure to compare two numeric lists in tcl. I am new to the language and therefore I just need some guidance.

RE: TCl numeric list

Hi

Quote (tclwannabe):

compare two numeric lists
In which way ?

For example this procedure compares two lists and returns -1, 1 or 0 when the first list is longer, the second list is longer or their lengths are equal respectively :

CODE --> Tcl

proc lcmp {a b} \
{
  set diff [expr [llength $a]-[llength $b]]

  if {$diff==0} {
    return 0
  } elseif {$diff<0} {
    return 1
  } else {
    return -1
  }
}
 

Feherke.

RE: TCl numeric list

consider this:

CODE

% set a {1 2 3}
1 2 3
% set b {4 5 6}
4 5 6
% foreach x $a y $b {puts $x,$y}
1,4
2,5
3,6
%

_________________
Bob Rashkin

RE: TCl numeric list

(OP)
thanks for your help both of you. The thing I am trying to do is to compare two numeric lists and then another set of two lists and if they both are equal then I do the next action. I understand the solution you have shared with me but the problem is with writing a procedure that will take four lists compare a particular set of two and then give me a result.

RE: TCl numeric list

(OP)
basically for equality elements of the lists have to be same.  

RE: TCl numeric list

Hi

Not sure what "particular set of two" should be, this procedure takes 4 parameters then compares 1st with 2nd and 3rd with 4th. It returns true if the compared lists contain the same elements in the same order.

CODE --> Tcl

proc lcompare {a b c d} \
{
  foreach x $a y $b { if {$x!=$y} { return 0 } }
  foreach x $c y $d { if {$x!=$y} { return 0 } }
  return 1
}

Feherke.

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