Did you look at the description of handling arrays on the bash(1) man page on your system? I had hoped that showing how the array elements were printed in the for loop would have helped.
With a shell array like this, elements in the array have subscripts 0 through (n - 1) where n is the number of elements in the array. To get the value of the element of the array with subscript i, use ${array_name[i]}. The number of elements in the array is ${#array_name[@]}. So to print the 8th element of the array, use:
not:
But, you have an earlier problem. The:
in your script does not convert a CSV string into a CSV string with elements between commas converted to floating point values to two decimal places. It will only convert an initial string of digits (possibly including a single decimal point) into a single floating point value rounded to two digits after the decimal point. So, when you get to the command:
there is only one floating point value in $CSVstring and there aren't any commas in the expansion of that variable. So, V will be an array containing only one element.
I need to read a file (a list) and assign the value to a variable (for each line), I'm looping until the end of the file. My problem is, I want to assign 2 separate variables from the list. The process I'm using is:
awk '{print $3}' file1 > file2
awk '{print $4}' file1 > file3
cat file2... (2 Replies)
Hi,
I have a bash script that accepts some parameters as input, like:
sh script.sh first second third .....
I want to save these parameters as different variables, something like:
VAR1=first
VAR2=second
etc
I tried this, but apparently it didn't worked....... (16 Replies)
Hello,
I have a paramter $param consisting just of two literals and want to split it into two parameters, so I can combine it to a new parameter <char1><string><char2>, but the following code didn't work:
tmp_PARAM_1=cut -c1 $PARAM
tmp_PARAM_2=cut -c2 $PARAM... (2 Replies)
Hi,
I have a file like the following...
CUST=
DIR=
NULIST=
name=philps_123
How can i add values to each of these unassigned variables using a shell script?
say for eg: i have values for CUST as onida, dir as /dir/onida, NULIST as /tmp/onida_files. How can i add these values to... (11 Replies)
Hi ,I am trying to assign string to variable ,but it doesn't work
Also could you show me different ways to use grep,(I am trying to get the first,second and first column form file,and I am counting the chars)
let name=`grep "$id" product | cut -c6-20` (25 Replies)
Hello
I have a text file with the next pattern
Name,Year,Grade1,Grade2,Grade3
Name,Year,Grade1,Grade2,Grade3
Name,Year,Grade1,Grade2,Grade3
I want to assign to external variables the grades using the awk method.
After i read the file line by line in order to get the grades i use this
... (2 Replies)
How can I read a string delimited on spaces and assign the fields to incremented variables.
For example:
Given $exts= txt dat mov
I want to read in $exts and have "txt" "dat" and "mov" assigned to incremented variables like $ext1, $ext2, etc. I would like to do this in a loop so that I can... (4 Replies)
Hi guys,
I'm currently writing a script for automating a FreeBSD ZFS setup (ZFSonRooT). I got stuck at one point for raidz(1,2 a.k.a raid5,6) and am in need of assistance.
This is what I need. example:
#!/bin/sh <- must stay sh
echo -n "hdd list: "
read hdd_list
echo -n "hdd label list:... (2 Replies)
i have a program that spits out a certain number of values. i dont know the number of values. they can be 4, 10, 7, 20, no idea.
but, i want to be able to assign each of the value returned by this program to a variable.
in the latest instance, the program gave the following 6 values:
4... (8 Replies)
Hi all,
i have a .csv file with only two columns, like:
Login;Status
Luca;S
Marco;
Stefano;
Elettra;S
Laura;
...
I need to replace the blank space on Status column whit Enabled end, on the same column, S whit Disabled, like:
Login;Status
Luca;Disabled
Marco;Enabled
Stefano;Enabled... (10 Replies)
Discussion started by: kamose
10 Replies
LEARN ABOUT REDHAT
array
array(n) Tcl Built-In Commands array(n)
__________________________________________________________________________________________________________________________________________________NAME
array - Manipulate array variables
SYNOPSIS
array option arrayName ?arg arg ...?
_________________________________________________________________DESCRIPTION
This command performs one of several operations on the variable given by arrayName. Unless otherwise specified for individual commands
below, arrayName must be the name of an existing array variable. The option argument determines what action is carried out by the command.
The legal options (which may be abbreviated) are:
array anymore arrayName searchId
Returns 1 if there are any more elements left to be processed in an array search, 0 if all elements have already been returned.
SearchId indicates which search on arrayName to check, and must have been the return value from a previous invocation of array
startsearch. This option is particularly useful if an array has an element with an empty name, since the return value from array
nextelement won't indicate whether the search has been completed.
array donesearch arrayName searchId
This command terminates an array search and destroys all the state associated with that search. SearchId indicates which search on
arrayName to destroy, and must have been the return value from a previous invocation of array startsearch. Returns an empty string.
array exists arrayName
Returns 1 if arrayName is an array variable, 0 if there is no variable by that name or if it is a scalar variable.
array get arrayName ?pattern?
Returns a list containing pairs of elements. The first element in each pair is the name of an element in arrayName and the second
element of each pair is the value of the array element. The order of the pairs is undefined. If pattern is not specified, then all
of the elements of the array are included in the result. If pattern is specified, then only those elements whose names match pat-
tern (using the matching rules of string match) are included. If arrayName isn't the name of an array variable, or if the array
contains no elements, then an empty list is returned.
array names arrayName ?pattern?
Returns a list containing the names of all of the elements in the array that match pattern (using the matching rules of string
match). If pattern is omitted then the command returns all of the element names in the array. If there are no (matching) elements
in the array, or if arrayName isn't the name of an array variable, then an empty string is returned.
array nextelement arrayName searchId
Returns the name of the next element in arrayName, or an empty string if all elements of arrayName have already been returned in
this search. The searchId argument identifies the search, and must have been the return value of an array startsearch command.
Warning: if elements are added to or deleted from the array, then all searches are automatically terminated just as if array done-
search had been invoked; this will cause array nextelement operations to fail for those searches.
array set arrayName list
Sets the values of one or more elements in arrayName. list must have a form like that returned by array get, consisting of an even
number of elements. Each odd-numbered element in list is treated as an element name within arrayName, and the following element in
list is used as a new value for that array element. If the variable arrayName does not already exist and list is empty, arrayName
is created with an empty array value.
array size arrayName
Returns a decimal string giving the number of elements in the array. If arrayName isn't the name of an array then 0 is returned.
array startsearch arrayName
This command initializes an element-by-element search through the array given by arrayName, such that invocations of the array nex-
telement command will return the names of the individual elements in the array. When the search has been completed, the array done-
search command should be invoked. The return value is a search identifier that must be used in array nextelement and array done-
search commands; it allows multiple searches to be underway simultaneously for the same array. |
array unset arrayName ?pattern? |
Unsets all of the elements in the array that match pattern (using the matching rules of string match). If arrayName isn't the name |
of an array variable or there are no matching elements in the array, then an empty string is returned. If pattern is omitted and is |
it an array variable, then the command unsets the entire array.
KEYWORDS
array, element names, search
Tcl 8.3 array(n)