Split string into array not working

[erche]

Hi,
Can someone advise me to correct this script :

a="1,2,3,4,5,6,7,8"

nawk 'BEGIN { FS="," }
{ asum=split(a,b,FS)
printf ("%d",asum)
}

the result is asum = 0.
it supposed to be returning 8.

Please help

Thanks

 

[dickiebird]

Not sure what you want to acheive - but 'a' isn't passed into the nawk part of your script
If you want to sum array 'a' contents, then :
nawk '{
split("1 2 3 4 5 6 7 8",a)
for (j1=1;j1<=8;j1++) {
asum=asum+a[j1]
}
printf(&quot;%d&quot;,asum)
}'

HTH

Dickie Bird (-)))

 

[erche]

Oh I see,
so, for example, the a string is created like this :
a=$(nawk 'BEGIN { printf(&quot;a,b,c&quot; for (i=1;i<100;i+3) { printf(&quot;\n%d,%d,%d&quot;,i,i+1,i+2) }
}')

so, if i have that 'a' and and i put that a on :
nawk '{
a=$(nawk 'BEGIN { printf(&quot;a,b,c&quot; for (i=1;i<100;i+3){
printf(&quot;\n%d,%d,%d&quot;,i,i+1,i+2)
}}')
asum=split(a,b,&quot;,&quot
printf(&quot;%d&quot;,asum)
}'

It should be worked ?

 

[Salem]

If 'a' is your shell variable, then this should work

awk -v a=$a 'BEGIN { asum=split(a,b,",");print asum }'

If your awk doesn't support setting variables in this way, try

awk 'BEGIN { asum=split("'$a'",b,",");print asum }'