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That's the `ksh` array syntax. different shells have different array syntaxes.

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edited Jul 3, 2014 at 7:51

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sh does not support array, and your code does not create an array. It created three variable arr1, arr2, arr3.

To initialize an array element in a ksh-like shell, you must use syntax array[index]=value. To get all element in array, use ${array[*]} or ${array[@]}.

Try:

n=1
eval arr[$n]=a
n=2
eval arr[$n]=b
n=3
eval arr[$n]=c

n=1
eval echo \${arr[$n]}
n=2
eval echo \${arr[$n]}
n=3
eval echo \${arr[$n]}

n='*'

eval echo \${arr[$n]}

sh does not support array, and your code does not create an array. It created three variable arr1, arr2, arr3.

To initialize an array element, you must use syntax array[index]=value. To get all element in array, use ${array[*]} or ${array[@]}.

Try:

n=1
eval arr[$n]=a
n=2
eval arr[$n]=b
n=3
eval arr[$n]=c

n=1
eval echo \${arr[$n]}
n=2
eval echo \${arr[$n]}
n=3
eval echo \${arr[$n]}

n='*'

eval echo \${arr[$n]}

sh does not support array, and your code does not create an array. It created three variable arr1, arr2, arr3.

To initialize an array element in a ksh-like shell, you must use syntax array[index]=value. To get all element in array, use ${array[*]} or ${array[@]}.

Try:

n=1
eval arr[$n]=a
n=2
eval arr[$n]=b
n=3
eval arr[$n]=c

n=1
eval echo \${arr[$n]}
n=2
eval echo \${arr[$n]}
n=3
eval echo \${arr[$n]}

n='*'

eval echo \${arr[$n]}

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answered Jul 3, 2014 at 7:47

cuonglm

158.2k
41
342
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sh does not support array, and your code does not create an array. It created three variable arr1, arr2, arr3.

To initialize an array element, you must use syntax array[index]=value. To get all element in array, use ${array[*]} or ${array[@]}.

Try:

n=1
eval arr[$n]=a
n=2
eval arr[$n]=b
n=3
eval arr[$n]=c

n=1
eval echo \${arr[$n]}
n=2
eval echo \${arr[$n]}
n=3
eval echo \${arr[$n]}

n='*'

eval echo \${arr[$n]}