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gotcha: n. A misfeature of a system, especially a
programming language or environment, that tends to breed bugs or mistakes
because it is both enticingly easy to invoke and completely unexpected
and/or unreasonable in its outcome. For example, a classic gotcha in
C is the fact that if (a=b)
{code;} is syntactically valid and sometimes even correct. It
puts the value of b into a and then executes code if a is
non-zero. What the programmer probably meant was if
(a==b) {code;}, which executes code if a and
b are equal.
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