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Stack vs heap allocation of structs in Go, and how they relate to garbage collection
...
It's worth noting that the words "stack" and "heap" do not appear anywhere in the language spec. Your question is worded with "...is declared on the stack," and "...declared on the heap," but note that Go declaration syntax says nothing about stack or heap.
That technically makes t...
Send email using java
... new Oauth2.Builder(httpTransport, JSON_FACTORY, credentials).setApplicationName("JStock").build();
Userinfoplus userInfo = userInfoService.userinfo().get().execute();
return userInfo;
}
public static String loadEmail(File dataStoreDirectory) {
File file ...
Replace Fragment inside a ViewPager
...u probably noticed yourself, using that ID in your code causes nothing to happen. I will explain why:
First of all, to make ViewPager repopulate the pages, you need to call notifyDataSetChanged() that resides in the base class of your adapter.
Second, ViewPager uses the getItemPosition() abstract ...
Volatile vs. Interlocked vs. lock
... ARE CONCURRENTLY SAFE ON ANY NUMBER OF COREs OR CPUs.
Interlocked methods apply a full fence around instructions they execute, so reordering does not happen.
Interlocked methods do not need or even do not support access to a volatile field, as volatile is placed a half fence around operations on gi...
Call Go functions from C
...f your package to supply a custom callback function, we use the exact same approach as above, but we supply the user's custom handler (which is just a regular Go function) as a parameter that is passed onto the C side as void*. It is then received by the callbackhandler in our package and called.
L...
What's the need of array with zero elements?
...d it would have meant the very same thing. The authors of the Linux kernel apparently love to make things needlessly complicated and non-standard, if an option to do so reveals itself.
In older C standards, ending a struct with an empty array was known as "the struct hack". Others have already expl...
What is hashCode used for? Is it unique?
...lue
types must override this method to provide a hash function that is
appropriate for that type and to provide a useful distribution in a
hash table. For uniqueness, the hash code must be based on the value
of an instance field or property instead of a static field or
property.
Objec...
List of Delphi language features and version in which they were introduced/deprecated
...e same ABI for all calls.
Delphi 10.2 Tokyo
Support for Linux server apps (Intel 64-bit using LLVM and ARC).
Assigning a dynamic arrays to a pointer using the @ operator is only allowed when hard-casting the array.
More flexible namespace resolution of unit names
Delphi 10.1 Berlin
Nati...
How can I prevent SQL injection in PHP?
If user input is inserted without modification into an SQL query, then the application becomes vulnerable to SQL injection , like in the following example:
...
How do I adjust the anchor point of a CALayer, when Auto Layout is being used?
...make the mistake of triggering layout at the time that a view transform is applied.]
Autolayout vs. View Transforms
Autolayout does not play at all well with view transforms. The reason, as far as I can discern, is that you're not supposed to mess with the frame of a view that has a transform (oth...