Re^2: why can't I shift a split? (List vs Array)

Replies are listed 'Best First'.
Re^3: why can't I shift a split? (List vs Array) by LanX (Saint) on Aug 26, 2022 at 23:15 UTC
> should be EZ to coerce a list into an array sure: `DB<2> p shift @{[42..59]} 42` [download] or `DB<3> $shift = sub { shift @{$_[0]} } DB<4> p [42..59]->$shift 42` [download] but it doesn't make sense since the resulting shortened array is destroyed right away. Using a list slice is the logical° and easiest approach, without wasting operations. `DB<5> p (42..59)[0] 42` [download] compare an array slice which wastes resources again, by allocating an array in memory which is destroyed again. `DB<6> p [42..59]->[0] 42` [download] Cheers Rolf _{(addicted to the Perl Programming Language :) Wikisyntax for the Monastery} °) and "implementing" `pop` list is symmetrical `(42..59)[-1]`	[reply] [d/l] [select]

Replies are listed 'Best First'.

> should be EZ to coerce a list into an array

sure:

  DB<2> p shift @{[42..59]}
42
[download]

  DB<3> $shift = sub { shift @{$_[0]} }

  DB<4> p [42..59]->$shift
42
[download]

but it doesn't make sense since the resulting shortened array is destroyed right away.

Using a list slice is the logical° and easiest approach, without wasting operations.

  DB<5> p (42..59)[0]
42
[download]

compare an array slice which wastes resources again, by allocating an array in memory which is destroyed again.

  DB<6> p [42..59]->[0]
42
[download]

Cheers Rolf
_{(addicted to the Perl Programming Language :)

Wikisyntax for the Monastery}

°) and "implementing" pop list is symmetrical (42..59)[-1]