Issue with accessing value inside while loop, outside it
Hi,
Even though i have declared the variable outside the while loop, the changing value inside the while loop never reflects outside it
Always getting the error as : "This is not a valid market... Exiting", even if the name is proper & exists in the list. Inside the while loop it gets set to 1, but outside during the "if" check it takes up the 0 value.
hi,
Is there a way to access the redirected file inside the script. Here is what the command line looks like:
$ shar * > archive_file.arc
I know I can't access the name of archive_file.arc with positional parameters like $1, $2.. Is there any way to figure out what file the output of the... (3 Replies)
I have a file (email) containing email addresses.
I have a second file (terms) that contains simple regular expressions and words/characters. Here are some examples:
\.trainee
\.group
\.web
I want to go through email and delete lines containing the expressions/words from terms and write... (1 Reply)
I'm trying to understand if it's possible to create a set of variables that are numbered based on another variable (using eval) in a loop, and then call on it before the loop ends.
As an example I've written a script called question (The fist command is to show what is the contents of the... (2 Replies)
Hi All,
I have some files in my directory, and i want to pull all data using for loop....I am using following code but getting error..!
for file in {file1, file2, file3, ..... filen}
do
L="$(tail -1 $file)";NUM=${L%%|*};DAT=${L##*|}
echo $NUM>>filedata.txt
done
Error:
tail:... (3 Replies)
Hi all
Sorry for the basic question, but i am writing a shell script to get around a slightly flaky binary that ships with one of our servers. This particular utility randomly generates the correct information and could work first time or may work on the 12th or 100th attempt etc !.... (4 Replies)
Hi all,
Here is an outline of the problem:
#variable declared at start of script
x=0;
#a function that increments x by 1 every 10 seconds
incrementX(){
increments x every 10 seconds;
}
#i want this to output the value of x every second. The problem is that x is always reported... (3 Replies)
Hi ,
I'm trying to move/copy the files inside the loop into a directory .
I tried the below code and the issue is the data is not copying into the created directory but the files are copying into another file
file_path="/home/etc"
Last_Day=20130930
mkdir $file_path/ARC_${Last_Day}
... (3 Replies)
Hi Guys,
I need to access multiple directories whcih is following similar structure and need to copy those files in desitination path.
for eg :
if ]
then
cd ${DIR}/Mon/loaded
echo "copying files to $GRS_DIR"
cp * ${DIR}/Mon/
echo "Files of Monday are Copied"
fi
if ]
then... (5 Replies)
Discussion started by: rohit_shinez
5 Replies
LEARN ABOUT DEBIAN
foreach
foreach(3tcl) Tcl Built-In Commands foreach(3tcl)__________________________________________________________________________________________________________________________________________________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(3tcl), while(3tcl), break(3tcl), continue(3tcl)KEYWORDS
foreach, iteration, list, looping
Tclforeach(3tcl)