大约有 23,000 项符合查询结果（耗时：0.0325秒） [XML]
Collections.emptyMap() vs new HashMap()
...e this, and does not allow null references:
public ResultSet executeQuery(String query, Map<String, Object> queryParameters);
If you have a query that doesn't take any parameters, it's certainly a bit wasteful to create a HashMap, which involves allocating an array, when you could just pass...
The entitlements specified…profile. (0xE8008016). Error iOS 4.2
... run the HealthKit "fit" app for iOS8 - there was an additional identifier string in the entitlements file. Removing it allowed the project to run after following other steps mentioned in this thread
– Alex Stone
Jul 17 '14 at 18:38
...
Installing Ruby Gem in Windows
...uby 2.0.0p353 (2013-11-22) [i386-mingw32]
For Ruby 2.4 or later, run the extra installation at the end to install the DevelopmentKit. If you forgot to do that, run ridk install in your windows console to install it.
For earlier versions:
Download and install DevelopmentKit from the same downloa...
Is it possible for a computer to “learn” a regular expression by user-provided examples?
...
Yes, it's certainly "possible"; Here's the pseudo-code:
string MakeRegexFromExamples(<listOfPosExamples>, <listOfNegExamples>)
{
if HasIntersection(<listOfPosExamples>, <listOfNegExamples>)
return <IntersectionError>
string regex = "";
...
How can I use different certificates on specific connections?
...eArrayInputStream derInputStream = new ByteArrayInputStream(app.certificateString.getBytes());
CertificateFactory certificateFactory = CertificateFactory.getInstance("X.509");
X509Certificate cert = (X509Certificate) certificateFactory.generateCertificate(derInputStream);
String alias = "alias";//ce...
WHERE vs HAVING
...ect_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
+----+-------------+-------+-------+---------------+-------+---------+------+------+--------------------------+
| 1 | SIMPLE | table | range | value | value | 4 | NULL | 5 | U...
Can we omit parentheses when creating an object using the “new” operator?
... making a mistake you should use (new Object).func(). But I consider using extra parenthesis and extra equal signs, as in == vs ===, a bad excuse for not learning your language.
– Jean Vincent
Jun 2 '17 at 12:26
...
Non-Relational Database Design [closed]
...DBs are a massive win, and the drawbacks of less flexible queries and some extra code for data validation seems a small price to pay.
Have you hit your head against anything that seems impossible?
Not yet. Map/reduce as a means of querying a database is unfamiliar, and requires a lot more thinking...
Finish all previous activities
...eturn you to home screen finishing all the other activites. You can add an extra in the intent and read that in the home screen activity and finish it also (maybe launch login screen again from there or something).
I am not sure but you can also try going to login with this flag. I don't know how t...
Transposing a NumPy array
...rally speaking though, you don't ever need to worry about this. Adding the extra dimension is usually not what you want, if you're just doing it out of habit. Numpy will automatically broadcast a 1D array when doing various calculations. There's usually no need to distinguish between a row vector a...