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How do I find out which keystore was used to sign an app?
...this file may also be CERT.RSA, but there should only be one .RSA file).
Then issue this command:
keytool -printcert -file ANDROID_.RSA
You will get certificate fingerprints like this:
MD5: B3:4F:BE:07:AA:78:24:DC:CA:92:36:FF:AE:8C:17:DB
SHA1: 16:59:E7:E3:0C:AA:7A:0D:F2:0D:05:20:12:...
How to define @Value as optional
...required?
Working on the assumption that by 'not required' you mean null then...
You have correctly noted that you can supply a default value to the right of a : character. Your example was @Value("${myValue:DEFAULT}").
You are not limited to plain strings as default values. You can use SPEL ex...
Implementing Comments and Likes in database
...ing a new kind of entity involves just adding a new "inherited" table - it then automatically plugs into the whole like/tag/comment machinery.
Entity-relationship term for this is "category" (see the ERwin Methods Guide, section: "Subtype Relationships"). The category symbol is:
Assuming a user...
What is the difference between class and instance methods?
...Object
+ (void)aClassMethod;
- (void)anInstanceMethod;
@end
They could then be used like so:
[MyClass aClassMethod];
MyClass *object = [[MyClass alloc] init];
[object anInstanceMethod];
Some real world examples of class methods are the convenience methods on many Foundation classes like NSSt...
Is asynchronous jdbc call possible?
...ySql?) offers a means to intercept the socket creation (see SocketFactory) then I imagine it would be possible to build an async event driven database layer on top of the JDBC api but we'd have to encapsulate the whole JDBC behind an event driven facade, and that facade wouldn't look like JDBC (afte...
What is a C++ delegate?
...the one passed in by the user, compiler tricks like first forward declare, then typedef then declare again, this time inheriting from another class or similar shady techniques. While it is a great accomplishment for the implementers who built that, it is still a sad testimoney on how C++ evolves.
On...
When is CRC more appropriate to use than MD5/SHA1?
...
If security is you goal then you should never ever use MD5, SHA-1 should also be avoided, some variant of SHA-2 is recommended.
– Peter
Mar 17 '17 at 10:26
...
How to debug Apache mod_rewrite
... there too because if you only enable it (as i did) in the .htaccess file, then nothing will be logged.
– chacham15
Nov 13 '13 at 23:20
12
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ObservableCollection not noticing when Item in it changes (even with INotifyPropertyChanged)
...fire when an item is changed. I guess you'll need a more bruteforce method then:
public class CollectionViewModel : ViewModelBase
{
public ObservableCollection<EntityViewModel> ContentList
{
get { return _contentList; }
}
public CollectionViewModel()
{
...
What is Func, how and when is it used
... 1-argument instance method is very similar to 2-argument static function. Then, we have delegates which store target object and function pointer. Delegates can store the first argument in target or not do that.
– Ark-kun
Jan 9 '14 at 21:37
...