Pops wrote:
$("start").value -= 1*$("rows").value; // <- WORKS AS EXPECTED
$("start").value += 1*$("rows").value; // <- BUG!!
$("start").value -= -1*$("rows").value; // <- FIX!!
To me, that looks look like a JS type casting bug or inclusive
addition bug?
I don't think so. I simply think of "+=" as shorthand, e.g.,
a += b
is simple shorthand for
a = a + b;
Because "a = a - b" cannot be a concatenation, the casting is done and a
numeric value is returned. But "a = a + b" is legitimate for strings,
so no casting is necessary, and a string is returned. That's the
downside of using "+" for concatenation.
-- Scott
