Query w.r.t foreach - The Tcl programming language

1b4b5 Query w.r.t foreach - The Tcl programming language

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Query w.r.t foreach

Posted by kris6 (kris6), 19 August 2006

$rows = {0 1 1 5} {1 24 1 5 } {2 1 1 5 } {3 48 1 5 } {4 1 1 4 }

My code looks like this;

foreach lrow rows{
puts " $lrow \n"
}

This will print
0 1 1 5
1 24 1 5
2 1 1 5
3 48 1 5
4 1 1 4

My requirement is to access the next element also within the same loop,

foreach lrow rows{
puts " $lrow \n"
//read the next element
puts " $lrow \n"
}

How do i read the next element?

Posted by admin (Graham Ellis), 19 August 2006

use for rather that foreach, for example:

Code:

set rowrow {{1 2 3} {4 5 6} {7 8 9} {A C J}}
for {set k 0} {$k < [expr [llength $rowrow] - 1]} {incr k} {
puts -nonewline "this "
puts [lindex $rowrow $k]
puts -nonewline "next "
set kp1 [expr $k + 1]
puts [lindex $rowrow $kp1]
}

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