Re^2: Searching between two hashes

in reply to Re: Searching between two hashes
in thread Searching between two hashes

Thanks for that. After 17 years of programming with Perl, I still get those particular operators confused. Part of it is also the fact that I don't do a whole lot of programming any more.

TStanley
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People sleep peaceably in their beds at night only because rough men stand ready to do violence on their behalf. -- George Orwell

Comment on Re^2: Searching between two hashes

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Re^3: Searching between two hashes by hippo (Bishop) on Nov 11, 2017 at 11:54 UTC
I still get those particular operators confused. Top tip: since you know that you fall victim to this (which is more than half the battle), don't write them as `$mac2 = ''` which is plausible, but instead like `'' = $mac2` which is not. The latter is trapped at compile time. Then when you see the compiler errors you can replace the offending expression with the correct `'' eq $mac2`. Always put the literal value on the left side of the operator to prevent it being a plausible assignment. HTH. (Edited for typo)	[reply] [d/l] [select]

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Re^3: Searching between two hashes
by hippo (Bishop) on Nov 11, 2017 at 11:54 UTC

I still get those particular operators confused.

Top tip: since you know that you fall victim to this (which is more than half the battle), don't write them as $mac2 = '' which is plausible, but instead like '' = $mac2 which is not. The latter is trapped at compile time. Then when you see the compiler errors you can replace the offending expression with the correct '' eq $mac2. Always put the literal value on the left side of the operator to prevent it being a plausible assignment. HTH.

(Edited for typo)

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