Re^7: scanning hash

I was thinking of something simpler, such as:

$x = 1.23456;
$y = 1.234560000000001;
print 0+($x == $y); # prints 0 for me
print 0+($x eq $y); # prints 1 for me
[download]

$x = 0;
$y = "0";
[download]

Are they equal? Yes and no.

Comment on Re^7: scanning hash Select or Download Code

Replies are listed 'Best First'.
Re^8: scanning hash by Aristotle (Chancellor) on Aug 02, 2004 at 20:37 UTC
That is a very similar class of problem, although not exactly the same. I was dealing with the question of whether to compare "by reference" or "by value". A typical situation where this is an issue is comparing objects. What is the criterion then, identity or equality? The answer is much less clear than with the strings I used to demonstrate the point, because objects manifest as references by definition. Makeshifts last the longest.	[reply]

Replies are listed 'Best First'.

Re^8: scanning hash
by Aristotle (Chancellor) on Aug 02, 2004 at 20:37 UTC

That is a very similar class of problem, although not exactly the same.

I was dealing with the question of whether to compare "by reference" or "by value". A typical situation where this is an issue is comparing objects. What is the criterion then, identity or equality? The answer is much less clear than with the strings I used to demonstrate the point, because objects manifest as references by definition.

Makeshifts last the longest.

[reply]