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!instanceof and !in operators
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bonch
#1 Posted : Wednesday, February 20, 2013 10:17:42 PM(UTC)
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Instead of writing:

Code:

if (!(someInstance instanceof someClass)) {}


It would be nice to write:

Code:

if (someInstance !instanceof someClass) {}

// or perhaps

if (someInstance notinstanceof someClass) {}


Same thing for the in operator:

Code:

if (!(someElement in someTable)) {}


Might instead be:

Code:

if (someElement !in someTable)) {}

// or perhaps

if (someElement notin someTable) {}


Thoughts?
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JayFoxRox
#2 Posted : Monday, July 15, 2013 8:09:50 PM(UTC)
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[Late reply]

Not really necessary in my opinion. It would only make the syntax more complicated with no obvious benefit.
I see your point though. And if there was a symbol instead of "instanceof" I would possibly like the inclusion for completion, example:
"x instanceof xClass" -> "x ~ xClass" then it would make sense to have "!~" because it's slightly more similar to "=" and "!=".

But personally I don't think you have to check for "is not instance of". For "in" this probably happens more often but only changing one would be confusing and it's still not necessary. Especially since "!(x in xTable)" is not that unreadable either. Especially with more readable code such as "(x in xTable) == false" which would probably work too.
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YourLocalFaxMachine
#3 Posted : Thursday, September 11, 2014 9:22:45 PM(UTC)
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While I would almost never use this, I would love a nicer syntax for it. It is pretty useless for just about everything, but I like me some pretty syntax.
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