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edited Jul 27, 2023 at 8:27

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@cas shows how to use the shell. Personally I like to do it using a {= perl =} replacement string:

parallel echo '{= $_=2**$_ =}' ::: {5..10}

but the difference is tiny and more just a matter of taste.

There are situations, where the Perl version is better: If you for some reason is forced to use sha shell which does not have the $(( expression )) construct (e.g. fish) or need more computational functionality: parallel echo '{= $_=2**($_/2) =}'

@cas shows how to use the shell. Personally I like to do it using a {= perl =} replacement string:

parallel echo '{= $_=2**$_ =}' ::: {5..10}

but the difference is tiny and more just a matter of taste.

There are situations, where the Perl version is better: If you for some reason is forced to use sh which does not have the $(( expression )) construct.

@cas shows how to use the shell. Personally I like to do it using a {= perl =} replacement string:

parallel echo '{= $_=2**$_ =}' ::: {5..10}

but the difference is tiny and more just a matter of taste.

There are situations, where the Perl version is better: If you for some reason is forced to use a shell which does not have the $(( expression )) construct (e.g. fish) or need more computational functionality: parallel echo '{= $_=2**($_/2) =}'

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answered Jul 26, 2023 at 9:40

Ole Tange

37.5k
34
119
226

@cas shows how to use the shell. Personally I like to do it using a {= perl =} replacement string:

parallel echo '{= $_=2**$_ =}' ::: {5..10}

but the difference is tiny and more just a matter of taste.

There are situations, where the Perl version is better: If you for some reason is forced to use sh which does not have the $(( expression )) construct.