...t, and changing a reference. s2 still points to the same object as we initially set s1 to point to. Setting s1 to "Help!" only changes the reference, while the String object it originally referred to remains unchanged. If strings were mutable, we could do something like this: String s1 = "Hello"; St...

...y and a set member, because these data structures use the hash value internally. All of Python’s immutable built-in objects are hashable, while no mutable containers (such as lists or dictionaries) are. Objects which are instances of user-defined classes are hashable by default; they all comp...

... 1 is that it requires both the server and clients to sort and sign identically. This is fiddly code and either it's right or you get 401 Unauthorized with little help. This increases the barrier to writing a client. By requiring the authorization request to run over SSL, OAuth 2.0 removes the need...

...eral strings selected in a file in Sublime Text and I want to convert them all to lowercase. 5 Answers ...

... Git submodules. Git addresses this issue using submodules. Submodules allow you to keep a Git repository as a subdirectory of another Git repository. This lets you clone another repository into your project and keep your commits separate. ...

...d query in the same order as the index will simply return the rows sequentially in the correct order. Finding a record in a BTree takes O(Log(n)) time. Finding a range of records in order is only OLog(n) + k where k is the number of records to return. If the records are out of order, the cost coul...

...}); Each directive will get its own instance of the controller, but this allows you to share the logic between as many components as you want. Require a Controller If you want to share the same instance of a controller, then you use require. require ensures the presence of another directive an...

...ow level, the return is translated into some sort of jump. If a function really returned nothing at all, there would be no way of knowing what and when to call the next function, or to call event handlers and the like. So to recap: No, a JS function needn't return anything as far as your code goes....

...rror changes made to another, instead of copying the existing data. It's called assignment by reference, which, to quote the manual, "means that both variables end up pointing at the same data, and nothing is copied anywhere". The only thing that is deprecated with =& is "assigning the result ...

...interface, a module that is a part of the Zope Component Architecture, a really awesomely cool component framework. Here you don't subclass from the interfaces, but instead mark classes (or even instances) as implementing an interface. This can also be used to look up components from a component reg...