Re: Loops (was Re: do { quit; } else { })

On 18.04.2025 16:34, bart wrote:

On 18/04/2025 14:01, Janis Papanagnou wrote:

>
Sure, many language support newer syntaxes for such things. Even older
languages do such abstractions; e.g. Awk[*]
>
     split ("one two three four five", table)
     for (i in table)
         print i, table[i]
>

 

(One of many things I like in this very small but powerful language.)

 
I had to check your claims:
 
* Awk primarily uses a C-style for loop; using 'for in' is an
alternative (it's not clear if this is specific to gnu-Awk)

The 'in' loop was always available and is also POSIX standard.

My footnote (you stripped it)....

[*] Read it as "GNU Awk", since in that variant (as opposed to standard
Awk) you can control the 'for' iteration order.

...pointed to a non-standard GNU extension how to iterate over Awk's
associative arrays; the standard provides no guarantee about the order
of traversal. GNU Awk allows to iterate in various ways; by index or
by value, in numeric or alphabetic order, ascending or descending.
These options are a very useful extension.

 
* 'i in table' iterates over /indices/, not values as is more typical of
languages that support 'in'.

Yes. - But see what I wrote about traversal options in GNU Awk.

Janis

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