shell script array length

Posted by Dipro Sen on Stack Overflow See other posts from Stack Overflow or by Dipro Sen
Published on 2012-12-14T16:44:44Z Indexed on 2012/12/14 17:03 UTC
Read the original article Hit count: 275

Filed under:

arrays

|

shell

I assume arguments to my shell scripts willbe ./x.sh subject N file1 file2 fileN So I am splicing argv from 3 till end candidates=${@:3}

now I want to check whether length of candidates is same as given N I am trying with echo $((${#candidates[@]})) which is always returning 1.

I can do echo "$#-2" | bc but, I shouldn't I be able to get array size ?

I can use bc to do integer comparison. but I've to know the size of `candidates array which I am not getting properly.

© Stack Overflow or respective owner

Related posts about arrays

Arrays in php, Compare 2 arrays and keep duplicate values

as seen on Stack Overflow - Search for 'Stack Overflow'
The following is 2 different definitions of the problem: How can I process 2 arrays so that I can keep the data of duplicate array[key] values. I have arrays A and B. I want to create array C with the children that their id/key values exist in both A and B arrays. Thank you >>> More
commands&creating pointer [closed]

as seen on Stack Overflow - Search for 'Stack Overflow'
input 23 3 4 4 42 n 23 0 9 9 n n n 3 9 9 x //according to input,i should create int pointer arrays. pointer arrays // starting from 1 (that is initial arrays is arrays[1].when program sees n ,it // must be jumb to arrays 2 // the first int input 23 is num_arrays which used… >>> More
n & x commands&creating pointer&with using malloc [closed]

as seen on Stack Overflow - Search for 'Stack Overflow'
input 23 3 4 4 42 n 23 0 9 9 n n n 3 9 9 x //according to input,i should create int pointer arrays. pointer arrays // starting from 1 (that is initial arrays is arrays[1].when program sees n ,it // must be jumb to arrays 2 // the first int input 23 is num_arrays which… >>> More
reopen or read and say why not reopened [closed]

as seen on Stack Overflow - Search for 'Stack Overflow'
input 23 3 4 4 42 n 23 0 9 9 n n n 3 9 9 x //according to input,i should create int pointer arrays. pointer arrays // starting from 1 (that is initial arrays is arrays[1].when program sees n ,it // must be jumb to arrays 2 // the first int input 23 is num_arrays which used… >>> More
Fortran arrays and subroutines (sub arrays)

as seen on Stack Overflow - Search for 'Stack Overflow'
I'm going through a Fortran code, and one bit has me a little puzzled. There is a subroutine, say SUBROUTINE SSUB(X,...) REAL*8 X(0:N1,1:N2,0:N3-1),... ... RETURN END Which is called in another subroutine by: CALL SSUB(W(0,1,0,1),...) where W is a 'working array'. It appears that a specific… >>> More

Related posts about shell

How to restrict the users' shell allowing to execute shell programs

as seen on Server Fault - Search for 'Server Fault'
Is it possible to prevent any user to not use commands like ls, rm and other system commands which could harm the system. But the users should be able to execute shell programs. >>> More
Shell extension installation not recognized by Windows 7 64-bit shell

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a Copy Hook Handler shell extension that I'm trying to install on Windows 7 64-bit. The shell extension DLL is compiled in two separate versions for 32-bit and 64-bit Windows. The DLL implements DLLRegisterServer which adds the necessary registry entries. After adding the registry entries… >>> More
Running shell commands without a shell window

as seen on Stack Overflow - Search for 'Stack Overflow'
With either subprocess.call or subprocess.Popen, executing a shell command makes a shell window quicky appear and disappear. How can I run the shell command without the shell window? >>> More
Why can't I reinstall MySQL?

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I've been looking all around the Internet for an answer but didn't find anything. I hope you can help me now. I have a server with MySQL. From one day to another, MySQL didn't let me enter with my root password anymore (accsess denied for user 'root'@'localhost' using password: 'YES'). So I tried… >>> More
Bash/shell script - shell output redirection inside a function

as seen on Stack Overflow - Search for 'Stack Overflow'
function grabSourceFile { cd /tmp/lmpsource wget $1 > $LOG baseName=$(basename $1) tar -xvf $baseName > $LOG cd $baseName } When I call this function The captured output is not going to the log file. The output redirection works fine until I call the… >>> More