It was common practice for C compilers to prepend a leading underscore to all external scope program identifiers to avert clashes with contributions from runtime language support If the runtime support is provided by the compiler, you would think it would make more sense to prepend an underscore to the few external identifiers in the … Read more
The unary plus operator performs an automatic conversion to int when the type of its operand is byte, char, or short. This is called unary numeric promotion, and it enables you to do things like the following: char c=”c”; int i = +c; Granted, it’s of limited use. But it does have a purpose. See … Read more
I found a good explanation at Pass-By-Name Parameter Passing. Essentially, the body of a function is interpreted at call time after textually substituting the actual parameters into the function body. In this sense the evaluation method is similar to that of C preprocessor macros. By substituting the actual parameters into the function body, the function … Read more
define(‘TRUE’, false); define(‘FALSE’, true); Happy debugging! (PHP < 5.1.3 (2 May 2006), see Demo) Edit: Uppercase bools are constants and lowercases are values. You are interested in the value, not in the constant, which can easily change. Eliminated run-time constant fetching for TRUE, FALSE and NULL author dmitry <dmitry> Wed, 15 Mar 2006 09:04:48 +0000 … Read more