>>>>> "Errin" == Errin M HMMA/IT Larsen <[EMAIL PROTECTED]> writes:
Errin> And furthermore, I will assume that the values in the hash are boolean
Errin> (i.e. '1' (ones) or '0' (zeros)). Now, I want to see if the WHOLE hash
Errin> is true, this being defined as every key having a value of '1'.
A bit of DeMorgans Laws knowledge helps here:
"ALL TRUE in my set" can be mapped to "NOT ANY FALSE in my set"
Since the count of items from grep in a scalar context is 0 when ANY
fails and non-zero when ANY succeeds, we can map this to:
NOT ANY FALSE in my set
! scalar grep !$_ , values %things;
And there's the formula!
Cleaning it up a bit:
if (! grep !$_, values %things) {
print "everything is true!\n";
}
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