instance

Eclipse will give an error, "The left-hand side of an assignment must be a variable", when I try something like: public class Thing{ String a1; int a2; public void meth(){ Thing A = new Thing(); this = A; } } I had to assign each variable ( this.a1 = A.a1; this.a2 = A.a2; ) as a work around. Are there other ways to do this without going through each variable field? And if this is not a variable what is it called? this is a pseudo-variable that points to the current instance of the object, it can not be reassigned. It's also considered a keyword in the language, according to section §3.9 of the

I'm trying to make some kind of function that loads and instantiates a class from a given variable. Something like this: <?php function loadClass($class) { $sClassPath = SYSPATH."/classes/{$class}.php"; if (file_exists($sClassPath)) { require_once($sClassPath); $class = $class::getInstance(); } } ?> If I use it like this: <?php loadClass('session'); ?> It should include and instantiate the session class. BTW: the static getInstance function comes from this code: <?php function getCallingClass() { $backtrace = debug_backtrace(); $method = $backtrace[1]['function']; $file = file($backtrace[1][

I am a little confused here with this findbugs warning in eclipse. public class MyClass { public static String myString; } public class AnotherClass { public void doSomething() { MyClass.myString = "something"; } } This gives me a findbugs warning "write to static field from instance method", however this does not give me a warning: public class MyClass { public static String myString; } public class AnotherClass { public void doSomething() { doAnotherThing(); } public static doAnotherThing() { MyClass.myString = "something"; } } How is this any different?, and why is writing to a static

I've learn a while ago on StackOverflow that we can get the "instance ID" of any resource , for instance: var_dump(intval(curl_init())); // int(2) var_dump(intval(finfo_open())); // int(3) var_dump(intval(curl_init())); // int(4) var_dump(intval(finfo_open())); // int(5) var_dump(intval(curl_init())); // int(6) I need something similar but applied to classes: class foo { public function __construct() { ob_start(); var_dump($this); // object(foo)#INSTANCE_ID (0) { } echo preg_replace('~.+#(\d+).+~s', '$1', ob_get_clean()); } } $foo = new foo(); // 1 $foo2 = new foo(); // 2 The above works but I

I want to create a new user in IAM, and allow him to be able to create new EC2 instances, but be able to view/administer only those instances that he creates. Is this possible with IAM? This is the group policy I tried: { "Statement": [ { "Effect": "Allow", "Action": [ "ec2:DescribeImages", "ec2:DescribeKeyPairs", "ec2:DescribeSecurityGroups", "ec2:DescribeAvailabilityZones" ], "Resource": "*" }, { "Effect": "Allow", "Action": [ "ec2:DescribeInstances","ec2:RunInstances", "ec2:TerminateInstances", "ec2:StartInstances", "ec2:StopInstances", "DescribeInstanceAttribute", "DescribeInstanceStatus"

Does OO JS have a mechanism for casting instance objects to boolean? I would like to be able to use custom instance objects directly in conditionals, and make assertions along the lines of !!(new Foo(0)) === false , !!(new Foo(1)) === true . Python has __nonzero__ and __len__ (see here ) Ruby has to_bool . How does JS do this for String literals "" and zero 0 ? No, JS does not provide a trap method for casting to boolean. Truthiness of a value is statically determined by the language rules and cannot be changed. You should give your instances a method to be explicitly invoked like isValid() ,