+12 works as "positive 12" in English, so why not in Elm? It's intuitive
that `-12` means -12, so it follows that `+12` could well mean 12. This
isn't unprecedented (Scala and Java).
Following this discussion (below) on Slack #beginners, I think that `+12`
should be interpreted by Elm the same way as `12` is, rather than as `+
12`. I don't think many, if any, write `+12` to mean `+ 12`.
What do you think? Even if the use-case below isn't compelling enough to
make the change, what use-case or what else would keep the change from
being made?
Here's the discussion:
"In Elm, is there a reason why -12 is a valid number while +12 is not?...
I was trying to parse the "+12" string to an int and getting parse
errors... My use case is validating a form when I enter a number of
decibels to change audio volumes. I wanted it to work with -10 or +12 or
just 12."
"Just to be clear, I can find a work around my use case, it’s not big deal.
I just found it surprising."
> String.toInt("+12")
Err "could not convert string '+12' to an Int" : Result.Result String
"The above is confusing, even Java gets it right :slightly_smiling_face:"
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