Re: Converting to boolean

There is also a variation on yours; $x &&= 1; and there is the corresponding pair on or; $x = $x || 0; $x ||= 0;. Update: Also trinary, $x = $x ? 1 : 0; and all sorts of variations on that, which have the advantage that truth and falsity are what you say they are.</Update>

None of the basic three are equivalent. Here is a comparison:

Expr Value Result Value Result

$x = $x && 1; true 1 false unchanged

$x = $x || 0; true unchanged false 0

$x = !! $x; true 1 false ''

But see diotalevi's fine reply for what !! actually returns. Context is everything!
Only $x = !! $x; gives you what I think you want.

But perl generally limps along just fine without any boolean type at all. See What is truth? (Curiosity corner).

After Compline,
Zaxo

Comment on Re: Converting to boolean
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Expr	Value	Result	Value	Result
`$x = $x && 1;`	true	1	false	unchanged
`$x = $x \|\| 0;`	true	unchanged	false	0
`$x = !! $x;`	true	1	false	''
But see diotalevi's fine reply for what !! actually returns. Context is everything!