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Is it OK to use == on enums in Java?
...owever, the enum construct gives you various benefits:
Each instance's toString() prints the name given in code.
(As mentioned in another post,) a variable of the enum type can be compared against constants using the switch-case control structure.
All the values in the enumeration can be queried u...
How can I calculate an md5 checksum of a directory?
...ther groupid and ownerid numbers are the same, not necessarily whether the string representation of group/owner are the same. This is in line with what for example rsync -a --delete does: it synchronizes virtually everything (minus xattrs and acls), but it will sync owner and group based on their I...
Color in git-log
...it 1.8.3 (May 24, 2013), you can use %C(auto) to decorate %d in the format string of git log.
From the release notes:
* "git log --format" specifier learned %C(auto) token that tells Git
to use color when interpolating %d (decoration), %h (short commit
object name), etc. for terminal output...
How to do a newline in output
...ems that both Ruby and PHP do not expand escape sequences in single quoted strings.
– kjagiello
Dec 31 '13 at 15:02
2
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how to remove only one style property with jquery
... documentation for css() says that setting the style property to the empty string will remove that property if it does not reside in a stylesheet:
Setting the value of a style property
to an empty string — e.g.
$('#mydiv').css('color', '') — removes
that property from an element if it
...
Is a GUID unique 100% of the time?
...me GUID values then put two of them next to each other.
Guid.NewGuid().ToString() + Guid.NewGuid().ToString();
If you are too paranoid then put three.
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How do I escape a percentage sign in T-SQL?
...nd the desired character (e.g. '!') to each of the existing % signs in the string and then add ESCAPE '!' (or your character of choice) to the end of the query.
For example:
SELECT *
FROM prices
WHERE discount LIKE '%80!% off%'
ESCAPE '!'
This will make the database treat 80% as an actual part o...
.NET List Concat vs AddRange
...e done a test comparing Concat and AddRange with a List<KeyValuePair<string, string>> with 1000 elements, concatenated/added 100 times, and AddRange was extremely faster. The results were these: AddRange 13 ms, Concat().ToList() 16,000 ms, and Concat on an IEnumerable doing only the ToLi...
Performant Entity Serialization: BSON vs MessagePack (vs JSON)
...include <msgpack.hpp>
class myclass {
private:
std::string str;
std::vector<int> vec;
public:
// This macro enables this class to be serialized/deserialized
MSGPACK_DEFINE(str, vec);
};
int main(void) {
// serialize
my...
Android ListView not refreshing after notifyDataSetChanged
...data again.
The idea is something similar to this :
private ArrayList<String> titles;
private MyListAdapter adapter;
private ListView myListView;
@Override
public void onCreate(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.main_activity);
...