array lenght

[domenicodl]

Hi,
how do you count the length of an array?
The command "length" works for strings, what I do is to scan the array with a for loop and increment a counter by one until the end of the array. Is there any other smarter way to do it ?
Thank you in advance.

 

[feherke]

Hi

Is there any other smarter way to do it ?

In your earlier threads you wrote that your operating system is Ubuntu. Although you not specified which Awk implementation are you using, most probably it is GNU Awk.

[tt]length([s])
Return the length of the string s, or the length of $0 if s is not supplied. As a non-standard extension, with an array argument, length() returns the number of elements in the array.[/tt]

Regarding a POSIX standard way, I know about none.


Feherke.

http://free.rootshell.be/~feherke/

 

[domenicodl]

GNU AWK 3.1.6

 

[feherke]

Hi

3.1.6 is enough for this :

[tt]length([s])
Returns the length of the string s, or the length of $0 if s is not supplied. Starting with version 3.1.5, as a non-standard extension, with an array argument, length() returns the number of elements in the array.[/tt]

( YMMV, but I would do anything to update to 4.0.0 as it contains many NEWS. )


Feherke.

http://free.rootshell.be/~feherke/