Revisions to How to do indirect variable evaluation

added 140 characters in body

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edited Jan 21, 2016 at 1:40

POSIXly:

for i in 1 2 3 4
do  AR1_p1=22
    AR1_p2=23
    AR1_p3=24
    AR1_p4=25
    echo "$((AR1_p$i))"
done

A little less messy, maybe:

for i in 1 2 3 4
do  echo "$((AR1_p$i=i+21))"
done

Still POSIXly, but far more sensible:

i=0 n=21 l=4
while  [ "$l" -ge "$((i+=1))" ]
do     echo "$((AR1_p$i=i+n))"
done

POSIXly:

for i in 1 2 3 4
do  AR1_p1=22
    AR1_p2=23
    AR1_p3=24
    AR1_p4=25
    echo "$((AR1_p$i))"
done

A little less messy, maybe:

for i in 1 2 3 4
do  echo "$((AR1_p$i=i+21))"
done

POSIXly:

for i in 1 2 3 4
do  AR1_p1=22
    AR1_p2=23
    AR1_p3=24
    AR1_p4=25
    echo "$((AR1_p$i))"
done

A little less messy, maybe:

for i in 1 2 3 4
do  echo "$((AR1_p$i=i+21))"
done

Still POSIXly, but far more sensible:

i=0 n=21 l=4
while  [ "$l" -ge "$((i+=1))" ]
do     echo "$((AR1_p$i=i+n))"
done

i dont even know why i put that other variable in at all.

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edited Jan 21, 2016 at 0:27

POSIXly:

for i in 1 2 3 4
do  AR1_p1=22
    AR1_p2=23
    AR1_p3=24
    AR1_p4=25
    echo "$((AR1_p$i))"
done

A little less messy, maybe:

AR1=21
for i in 1 2 3 4
do  echo "$((AR1_p$i=AR1+iAR1_p$i=i+21))"
done

POSIXly:

for i in 1 2 3 4
do  AR1_p1=22
    AR1_p2=23
    AR1_p3=24
    AR1_p4=25
    echo "$((AR1_p$i))"
done

A little less messy, maybe:

AR1=21
for i in 1 2 3 4
do  echo "$((AR1_p$i=AR1+i))"
done

POSIXly:

for i in 1 2 3 4
do  AR1_p1=22
    AR1_p2=23
    AR1_p3=24
    AR1_p4=25
    echo "$((AR1_p$i))"
done

A little less messy, maybe:

for i in 1 2 3 4
do  echo "$((AR1_p$i=i+21))"
done

Source Link

answered Jan 20, 2016 at 23:58

POSIXly:

for i in 1 2 3 4
do  AR1_p1=22
    AR1_p2=23
    AR1_p3=24
    AR1_p4=25
    echo "$((AR1_p$i))"
done

A little less messy, maybe:

AR1=21
for i in 1 2 3 4
do  echo "$((AR1_p$i=AR1+i))"
done

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