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Java: What is the difference between and ?
... {
static Log log = LogFactory.getLog(); // <clinit>
private int x = 1; // <init>
X(){
// <init>
}
static {
// <clinit>
}
}
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impr...
Lowercase JSON key names with JSON Marshal in Go
...the generated json is formatted.
For example:
type T struct {
FieldA int `json:"field_a"`
FieldB string `json:"field_b,omitempty"`
}
This will generate JSON as follows:
{
"field_a": 1234,
"field_b": "foobar"
}
...
How to make a Java thread wait for another thread's output?
...ered Nov 14 '08 at 7:56
Herman LintveltHerman Lintvelt
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In Python, when to use a Dictionary, List or Set?
...oes not: also a crucial distinction. (A "multiset", which maps duplicates into a different count for items present more than once, can be found in collections.Counter -- you could build one as a dict, if for some weird reason you couldn't import collections, or, in pre-2.7 Python as a collections.d...
Does making a struct volatile make all its members volatile?
... a struct const make all its members const?
If I have:
struct whatever { int data; };
const whatever test;
Will test.data be const too?
My answer is : Yes. If you declare an object of type whatever with const then all its members will be const too
Similarly, if you declare an object of type w...
How can I get the SQL of a PreparedStatement?
...ut, for prepared statements, the bind arguments are automatically inserted into the SQL output. This greatly Improves readability and debugging for many cases." Very useful for debugging, as long as you're aware that it's not how the statement is actually being executed by the DB server.
...
How does Haskell printf work?
...dently-typed languages. But there is some deep magic going on with Text.Printf that seems rather type-wonky.
1 Answer
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Why is the default value of the string type null instead of an empty string?
...nd I would feel it to be more consistent with the other
value types like int or double for example.
Assigning the default value to a specific reference type other than null would make it inconsistent.
Additionally Nullable<String> would make sense.
Nullable<T> works with the va...
How do I update an entity using spring-data-jpa?
...at I had the wrong primary key type specified in my Spring Data repository interface. It said extends CrudRepository<MyEntity, Integer> instead of extends CrudRepository<MyEntity, String> like it should have. Does that help? I know this is almost a year later. Hope it helps someone else....
Handler is abstract ,cannot be instantiated
...e() {
public void run() {
for (int i = 1; i <= 10; i++) {
// some process
downloadFile();
h.sendEmptyMessage(i);
Log.d(LOG_TAG, "i = " + i);...