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When to use EntityManager.find() vs EntityManager.getReference() with JPA
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153
I usually use getReference method when i do not need to access database state (I mean getter met...
What is a raw type and why shouldn't we use it?
...arameters?
The following is a quote from Effective Java 2nd Edition, Item 23: Don't use raw types in new code:
Just what is the difference between the raw type List and the parameterized type List<Object>? Loosely speaking, the former has opted out generic type checking, while the latter expl...
Set time to 00:00:00
...ndar.HOUR uses 0-11 (for use with AM/PM), and Calendar.HOUR_OF_DAY uses 0-23.
To quote the Javadocs:
public static final int HOUR
Field number for get and set indicating
the hour of the morning or afternoon. HOUR is used for the 12-hour
clock (0 - 11). Noon and midnight are represented...
get UTC time in PHP
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113
Using gmdate will always return a GMT date. Syntax is same as for date.
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What is sharding and why is it important?
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193
Sharding is just another name for "horizontal partitioning" of a database. You might want to sea...
How can I delete Docker's images?
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Sunny
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answered Mar 30 '15 at 22:15
user1378912user1378912
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log all sql queries
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edited Mar 25 '13 at 13:12
alecxe
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Do I need all three constructors for an Android custom view?
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edited Sep 1 '16 at 23:29
mbonnin
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answered ...
Xcode : failed to get the task for process
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answered Sep 20 '13 at 13:52
hasanhasan
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Do HTML WebSockets maintain an open connection for each client? Does this scale?
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edited Apr 13 '15 at 16:17
answered Feb 3 '11 at 0:13
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