Re: search for charater "="

On 5/5/2008 8:46 AM, pk wrote:
> On Monday 5 May 2008 15:25, Ed Morton wrote:
> 
> 
>>awk 'BEGIN{split("5 8 10",t);for(i in t)skip[t[i]]} !(NR in skip)' file
> 
> 
> So why not do just
> 
> awk 'BEGIN{skip[5];skip[8];skip[10]} !(NR in skip)' file
> 
> and avoid the extra array?
> 

because it's not reasonably scalable:

awk 'BEGIN{skip[5];skip[8];skip[10];skip[12];skip[15];skp[17];skip[21]}
!(NR in
skip)' file

vs:

awk 'BEGIN{split("5 8 10 12 15 17 21",t);for(i in t)skip[t[i]]} !(NR in
skip)' file

is open to typos (e.g. mistyping skp vs skip as I did in one spot above)
and it
doesn't let you just pass in a list of lines to skip:

awk -v lines="5 8 10 12 15 17 21" 'BEGIN{split(lines,t);for(i in
t)skip[t[i]]}
!(NR in skip)' file

Regards,

	Ed.