tested in laravel 4.2 for belongsToMany relationships if you’re in the model: //copy attributes $new = $this->replicate(); //save model before you recreate relations (so it has an id) $new->push(); //reset relations on EXISTING MODEL (this way you can control which ones will be loaded $this->relations = []; //load relations on EXISTING MODEL $this->load(‘relation1′,’relation2’); //re-sync everything … Read more
Apart from do not use clone, implement a copy constructor, you asked about memory constraints. The idea of cloning is to create an exact duplicate of the cloned object. So in worst case, you use twice the amount of memory afterwards. Practically – a bit less, because Strings are often interned and will (usually) not … Read more
I needed to install command line tools from Xcode. To do so- Open Xcode and hit Cmd+, Click Downloads Install command line tools. http://www.hongkiat.com/blog/mountain-lion-git-fix/
If it’s definitely just a Date, it won’t make any difference either way. If the actual object might be a subclass of Date (such as java.sql.Date) then I’d hope that clone() would preserve the extra information (including which class it is) whereas calling the constructor wouldn’t. As an aside, if you used Joda Time you … Read more
This works public static T DeepClone<T>(this T a) { using (MemoryStream stream = new MemoryStream()) { DataContractSerializer dcs = new DataContractSerializer(typeof(T)); dcs.WriteObject(stream, a); stream.Position = 0; return (T)dcs.ReadObject(stream); } }
protected native Object clone(). I don’t know exactly (I need to take a look at the native code) but it makes a new instance of the object inside the JVM and copies all fields. But you should avoid using clone() – it is hard to get it right. Look at this question for more details
You can’t. That’s the point of unexported fields: only the declaring package can modify them. Note that if the T type is declared in another package, you can’t even write: p := somepackage.T{“some string”, []int{10, 20}} because this would implicitly try to set the unexported T.is field and thus results in a compile-time error: implicit … Read more
That’s because the clone() method throws CloneNotSupportedException if your object is not Cloneable. You should take a look at the documentation for clone() method. Following is how clone() method is declared in the class Object: protected Object clone() throws CloneNotSupportedException Note: Also, it’s been realized that Clone is broken. This answer here in SO explains … Read more
That depends on what type of tag you use and what level of protection against cloning you want. NFC tags (as defined by the NFC Forum) have no protection against cloning. Such tags are intended as containers for freely readable data (so called NDEF messages). Anyone could read an NDEF message from one tag and … Read more
Object cloning is the act of making a copy of an object. As Cody pointed out, cloning in PHP is done by making a shallow copy of the object. This means that internal objects of the cloned object will not be cloned, unless you explicitly instruct the object to clone these internal objects too, by … Read more