Re: and then и or else

ïÔ: Alexey Naidyonov <CGatePro_at_mx_ru>
äÁÔÁ: Mon 23 Oct 2006 - 22:49:29 MSD

On Mon, 2006-10-23 at 11:03 -0700, Vladimir A. Butenko wrote:

> > ÷ÏÏÂÝÅ, ÏÂÒÁÔÉÔÅ ×ÎÉÍÁÎÉÅ ÎÁ ÏÐÉÓÁÎÉÅ ÁÌØÔÅÒÎÁÔÉ×ÎÏÇÏ ÓÉÎÔÁËÓÉÓÁ. åÓÌÉ
> > ÐÏÌØÚÏ×ÁÔØÓÑ ÔÏÌØËÏ ÉÍ, ÔÏ ÐÏÌÕÞÁÅÔÓÑ ÐÏÞÔÉ ÞÉÓÔÙÊ Ñ×ÁÓËÒÉÐÔ. õÓÌÁÄÁ
> > ×ÚÇÌÑÄÕ ÚÁËÏÒÅÎÅÌÙÈ ÓÉÛÎÉËÏ×.
>
> äÁÖÅ ÚÁËÏÒÅÎÅÌÙÊ ÓÉÛÎÉË-Ñ×ÁÓËÉÐÝÉË-ÌÉÎÕÈÏÍÁÎ ÐÏÎÉÍÁÅÔ ÞÔÏ ÏÐÅÒÁÃÉÉ
>
> if(getValue() & getMask()) ....
> É
> if(getValue() && getMask()) ....
>
> ÂÕÄÕÔ ÒÁÂÏÔÁÔØ "ÓÌÅÇËÁ ÐÏ-ÒÁÚÎÏÍÕ".

îÕ ÄÁ, ÐÏÔÏÍÕ ÞÔÏ ÜÔÏ ÒÁÚÎÙÅ ÏÐÅÒÁÃÉÉ. ðÅÒ×ÕÀ ÎÁÚÙ×ÁÀÔ "bitwise and", Á ×ÔÏÒÕÀ -- "logical and". íÎÅ, ËÓÔÁÔÉ, ×ÓÔÒÅÞÁÌÉÓØ coding style policy, × ËÏÔÏÒÙÈ ÐÒÑÍÏ ÚÁÐÒÅÝÁÌÏÓØ ÉÓÐÏÌØÚÏ×ÁÔØ bitwise ops × ÌÏÇÉÞÅÓËÉÈ ÕÓÌÏ×ÉÑÈ, ×ÍÅÓÔÏ ÜÔÏÇÏ ÒÅËÏÍÅÎÄÏ×ÁÌÏÓØ ÐÉÓÁÔØ

boolean mask = getMask();
if (getValue() && mask) ...

ôÁË ÞÔÏ "and" É "and then" ÍÎÅ, ÐÏÖÁÌÕÊ, ÄÁÖÅ ÎÒÁ×ÉÔÓÑ. ÷Ï ×ÓÑËÏÍ ÓÌÕÞÁÅ, ÐÏÓÌÅ ÒÁÚÍÙÛÌÅÎÉÊ, Ñ ÒÅÛÉÌ ÏÓÔÁÎÏ×ÉÔØÓÑ ÎÁ ÏÓÎÏ×ÎÏÍ ÓÉÎÔÁËÓÉÓÅ cg/pl, ÈÏÔÑ ÁÌØÔÅÒÎÁÔÉ×ÎÙÊ ÍÎÅ ×ÓÑËÏ ÐÒÉ×ÙÞÎÅÅ.

> é ×ÒÑÄ ÌÉ ÐÒÉ ÞÔÅÎÉ ÐÒÏÇÒÁÍÍÙ "×ÓÌÕÈ" ÂÕÄÅÔ
> ÎÁÚÙ×ÁÔØ ×ÔÏÒÏÊ ÏÐÅÒÁÔÏÒ "and".

:-)
óÐÒÏÓÉÌ ËÏÌÌÅÇÕ:
<...> I would use the plain and for the logical and <...> and be more verbose for the bitwise one

ðÒÁ×ÄÁ, ÏÐÙÔ ÎÅ ÓÏ×ÓÅÍ ËÏÒÒÅËÔÎÙÊ, ÐÏÔÏÍÕ ÞÔÏ ÏÎ ÎÅÍÅÃ. îÁÄÏ ÂÕÄÅÔ ÓÐÒÏÓÉÔØ ÂÒÉÔÁÎÃÁ :-)

SY,
--
 Alexey Naidyonov
 ITooLabs ðÏÌÕÞÅÎÏ Mon Oct 23 18:49:30 2006

üÔÏÔ ÁÒÈÉ× ÂÙÌ ÓÇÅÎÅÒÉÒÏ×ÁÎ hypermail 2.1.8 : Fri 24 Apr 2015 - 16:15:09 MSK