Hi everybody, i want to make an argument at echo command that takes a alpharithmetic and returns it reversed. How this can be done? plus what makefile changes are needed (0 Replies)
In the make file
update updateq:
-------------------
----------
i want the makefile to display some messages when user gives "make update", but totally quite wehn user enters "make updateq". Can u tell me how to read these argument in makefile.
$1 doesnt work:( (3 Replies)
hi,
i have a script that runs on bash and would like to run it on a machine that has csh and bash. the default setting on that machine is csh. i dont want to change my code to run it with a csh shell. is there any way i can run the script (written in bash) on this machine? in other words is there... (3 Replies)
I have no idea what the following means. The teacher is too advanced for me to understand fully. We literally went from running a few commands over the last few months to starting shell scripting. I am not a programmer, I am more hardware oriented. I wish I knew what this question was asking... (3 Replies)
This is what I have:
#!/bin/bash
#ascript.sh
WORD1=`tail -n +$1 /home/gscn/word1.txt | head -1`
sed -e "s/WORD1/$WORD1/g" < /home/gscn/configtmp > /home/gscn/config
WORD2=`tail -n +$1 /home/gscn/word2.txt | head -1`
sed -e "s/WORD2/$WORD2/g" < /home/gscn/config2tmp >... (4 Replies)
The following bash script does not work because the java/groovy code always thinks there are four arguments even if there are only 1 or 2. As you can see from my hideous backslashes, I am using cygwin bash on windows.
export... (1 Reply)
Here is my script:
#!/bin/ksh
usage ()
{
echo " Usage: $0 <opt1> <opt2> <opt3> <opt4>"
}
if ; then
usage
exit;
fi
prog -a $1 -b $2 -c $3 -d $4 2>&1 | tee -a ~/$1.log
I want argument 4 to be optional, so if there's no argument for opt4, that it doesn't... (8 Replies)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
1) The script is executed in the Korn shell.
2) Name the shell script file is asg6s.
3) The asg6s file is... (7 Replies)
Discussion started by: ProgMan2015
7 Replies
LEARN ABOUT SUSE
foreach
foreach(n) Tcl Built-In Commands foreach(n)
__________________________________________________________________________________________________________________________________________________NAME
foreach - Iterate over all elements in one or more lists
SYNOPSIS
foreach varname list body
foreach varlist1 list1 ?varlist2 list2 ...? body
_________________________________________________________________DESCRIPTION
The foreach command implements a loop where the loop variable(s) take on values from one or more lists. In the simplest case there is one
loop variable, varname, and one list, list, that is a list of values to assign to varname. The body argument is a Tcl script. For each
element of list (in order from first to last), foreach assigns the contents of the element to varname as if the lindex command had been
used to extract the element, then calls the Tcl interpreter to execute body.
In the general case there can be more than one value list (e.g., list1 and list2), and each value list can be associated with a list of
loop variables (e.g., varlist1 and varlist2). During each iteration of the loop the variables of each varlist are assigned consecutive
values from the corresponding list. Values in each list are used in order from first to last, and each value is used exactly once. The
total number of loop iterations is large enough to use up all the values from all the value lists. If a value list does not contain enough
elements for each of its loop variables in each iteration, empty values are used for the missing elements.
The break and continue statements may be invoked inside body, with the same effect as in the for command. Foreach returns an empty string.
EXAMPLES
This loop prints every value in a list together with the square and cube of the value:
set values {1 3 5 7 2 4 6 8} ;# Odd numbers first, for fun!
puts "Value Square Cube" ;# Neat-looking header
foreach x $values { ;# Now loop and print...
puts " $x [expr {$x**2}] [expr {$x**3}]"
}
The following loop uses i and j as loop variables to iterate over pairs of elements of a single list.
set x {}
foreach {i j} {a b c d e f} {
lappend x $j $i
}
# The value of x is "b a d c f e"
# There are 3 iterations of the loop.
The next loop uses i and j to iterate over two lists in parallel.
set x {}
foreach i {a b c} j {d e f g} {
lappend x $i $j
}
# The value of x is "a d b e c f {} g"
# There are 4 iterations of the loop.
The two forms are combined in the following example.
set x {}
foreach i {a b c} {j k} {d e f g} {
lappend x $i $j $k
}
# The value of x is "a d e b f g c {} {}"
# There are 3 iterations of the loop.
SEE ALSO
for(n), while(n), break(n), continue(n)
KEYWORDS
foreach, iteration, list, looping
Tcl foreach(n)