Re: Remove multiple fields from hashref?

references quick reference


@regular
## deref
@$ref

## deref
@{  $hRef }
@regular

@{  $hRef }{ qw/ s l i c e / }
@regular{ qw/ s l i c e / }

delete @{  $hRef }{ qw/ s l i c e / }
delete @regular{ qw/ s l i c e / }
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Comment on Re: Remove multiple fields from hashref? Download Code

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Re^2: Remove multiple fields from hashref? by Anonymous Monk on Mar 12, 2014 at 07:07 UTC
`use Data::Dump; %f = 1..8; dd\%f; delete @f{1..4}; dd\%f; $f=\%f; delete @{$f}{1..8}; dd $f; __END__ { 1 => 2, 3 => 4, 5 => 6, 7 => 8 } { 5 => 6, 7 => 8 } {}` [download]	[reply] [d/l]
Re^2: Remove multiple fields from hashref? by ultranerds (Hermit) on Mar 12, 2014 at 07:05 UTC
Thanks - so I basically just need to de-def it before I can do anything? :)	[reply]
Re^3: Remove multiple fields from hashref? by ultranerds (Hermit) on Mar 12, 2014 at 07:06 UTC
Never mind - I see what you mean - and it worked a charm. Thanks :)	[reply]
Re^4: Remove multiple fields from hashref? by Anonymous Monk on Mar 12, 2014 at 07:10 UTC
Yeah, thats about it :) FWIW, you don't need the extra {} in this case , but its the simplest rule to remember `$ perl -MData::Dump -e " $f = { 1..8 }; delete @$f{1..4}; dd$f; " { 5 => 6, 7 => 8 }` [download] Also happens to be first rule in References quick reference 99/100 I use rule 1 :)	[reply] [d/l]