I have a 2.67 GHz Celeron processor, 1.21 GB of RAM on a x86 Windows XP Professional machine. My understanding is that the Android emulator should start fairly quickly on such a machine, but for me it does not. I have followed all instructions in setting up the IDE, SDKs, JDKs and such and have had some success in staring the emulator quickly but is very particulary. How can I, if possible, fix this problem?
$x = ((int) self::YESTERDAY) + ((int) self::TODAY) + ((int) self::TOMORROW); Then if $x === 1; You've got what you need.
ReplyDeleteEDITED:
Even without type casts (int), it works well, thanks to @DaveRandom, so:
if (self::YESTERDAY + self::TODAY + self::TOMORROW == 1) {}, as for me.
The neatest way I can think of is array_sum():
ReplyDeleteif (array_sum(array(self::YESTERDAY, self::TODAY, self::TOMORROW)) == 1) {
// Do something
}
EDIT Actually, all you need to do it replace the ^ with + in your original attempt, and it achieves the same thing:
$x = self::YESTERDAY + self::TODAY + self::TOMORROW;
This turns $x into the number of TRUE values. So for a boolean output use:
$ok = self::YESTERDAY + self::TODAY + self::TOMORROW === 1;
Just as an alternative to devdRew's answer
ReplyDelete$x = array_count_values(array((int) self::YESTERDAY,(int) self::TODAY,(int) self::TOMORROW));
if (isset($x[1]) && $x[1] == 1) {
echo 'Only one TRUE';
}
You can loop over a list of your variables and break when you found a second boolean that is true:
ReplyDelete$moreThanOneTrue=false;
$oneTrue;
foreach ($BOOL_VAR_ARRAY as $bool) {
if ($bool) {
if($oneTrue) {
$moreThanOneTrue=true;
break;
}
$oneTrue=true;
}
}
Like this it's more handy when you have more than three variables.
x will return true if and only if one is true and others are false.
ReplyDelete$x = ($a && !($b || $c)) || ($b && !($a || $c)) || ($c && !($a || $b));
May be a bad code, but works.