I have a webpage, http://my.dns.com/~zp523/index.html,
I want all people to have read and execute privileges. I want to extend it with execute privilege. Which command should be used in chmod?
is it only give read(r) & execute(x) parameter in 'chmod ??? index.html'
thk a lot!! (1 Reply)
How do I access one of the indices in array tst with the code below?
tst=sprintf("%5.2f",Car / 12)
When I scan thru the array with
for ( i in tst ) { print i,tst }
I get the output of:
vec-7 144
But when I try this in the END
print tst
It looks like it's not set.
What am... (6 Replies)
PHP question...I posted this on the Web Development forum, but maybe this is a better place!
I have an SQL query that's pulled back user IDs as a set of columns. Rather than IDs, I want to use their names.
So I have an array of columns $col with values 1,7,3,12 etc and I've got an array $person... (3 Replies)
Hey everyone.
Is it possible to use two arrays in a loop?
Basically what I am trying to do is iterate through the elements in an array, and, based on a condition, use the current position in the array to point to that index in the array. Here's the loop structure I'm looking for:
... (1 Reply)
i have one file which contains data like the below
DE_CODE|AXXANY|APP_NAME|TELCO|LOC|NY
DE_CODE|AXXATX|APP_NAME|TELCO|LOC|TX
DE_CODE|AXXABT|APP_NAME|TELCO|LOC|BT
DE_CODE|AXXANJ|APP_NAME|TELCO|LOC|NJ
DE_CODE|AXXANJwt|APP_NAME|TELCO|LOC|WT
am going use a for loop or whole loop which will... (3 Replies)
I need your help to discover missing elements for each box.
In theory each box should have 4 items: ITEM01, ITEM02, ITEM08, and ITEM10.
Some boxes either have a missing item (BOX02 ITEM08) or might have da duplicate item (BOX03 ITEM02) and missing another one (BOX03 ITEM01).
file01.txt
... (2 Replies)
I'm looking for an efficient way to sum elements from 2 arrays using AWK and preserve header as well as sample names in the output array. I have Ubuntu 16.04 LTS. For example;
ARRAY 1
SAMPLE DERIVED ANCESTRAL
Sample1 14352 0
Sample2 14352 0
Sample3 14352 0
Sample4 ... (8 Replies)
So I need to Write an array processing program using a Linux shell programming language to perform the following.
Load array X of 20 numbers from an input file X.
Load array Y of 20 numbers from an input file Y.
Compute array Z by multiply Xi * Yi then compute the square-root of this... (2 Replies)
Discussion started by: sarapham409
2 Replies
LEARN ABOUT REDHAT
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
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)