Training, Open Source computer languages
PerlPHPPythonMySQLApache / TomcatTclRubyJavaC and C++LinuxCSS 
Search for:
Home Accessibility Courses Diary The Mouth Forum Resources Site Map About Us Contact
 
For 2021 - online Python 3 training - see ((here)).

Our plans were to retire in summer 2020 and see the world, but Coronavirus has lead us into a lot of lockdown programming in Python 3 and PHP 7.
We can now offer tailored online training - small groups, real tutors - works really well for groups of 4 to 14 delegates. Anywhere in the world; course language English.

Please ask about private 'maintenance' training for Python 2, Tcl, Perl, PHP, Lua, etc.
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]
     }




This page is a thread posted to the opentalk forum at www.opentalk.org.uk and archived here for reference. To jump to the archive index please follow this link.

You can Add a comment or ranking to this page

© WELL HOUSE CONSULTANTS LTD., 2021: Well House Manor • 48 Spa Road • Melksham, Wiltshire • United Kingdom • SN12 7NY
PH: 01144 1225 708225 • FAX: 01144 1225 793803 • EMAIL: info@wellho.net • WEB: http://www.wellho.net • SKYPE: wellho