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How do I update if exists, insert if not (AKA “upsert” or “merge”) in MySQL?
...sage`
(`thing_id`, `times_used`, `first_time_used`)
VALUES
(4815162342, 1, NOW())
ON DUPLICATE KEY UPDATE
`times_used` = `times_used` + 1
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follo...
Can I install Python 3.x and 2.x on the same Windows computer?
...ude C:\Python27\;C:\Python27\Scripts\;C:\Python34\;C:\Python34\Scripts\;
Now in command line you can use python for 2.7 and python3 for 3.4.
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f...
Accessing attributes from an AngularJS directive
...
URL is now changed to docs.angularjs.org/api/ng/service/$compile#Attributes
– bhatiaravi
Mar 25 '14 at 12:49
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Why start an ArrayList with an initial capacity?
...
If you know in advance what the size of the ArrayList is going to be, it is more efficient to specify the initial capacity. If you don't do this, the internal array will have to be repeatedly reallocated as the list grows.
The large...
What's the Point of Multiple Redis Databases?
...
I don't really know any benefits of having multiple databases on a single instance. I guess it's useful if multiple services use the same database server(s), so you can avoid key collisions.
I would not recommend building around using the KE...
Set up adb on Mac OS X
...
Has now moved to cask: brew cask install android-platform-tools
– hoju
Apr 7 '17 at 14:53
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Is it possible to “await yield return DoSomethingAsync()”
...erators as implemented with yield are a blocking construct, so as of right now await and yield are incompatible.
Long Because iterating over an IEnumerable is a blocking operation, calling a method marked as async will still execute it in a blocking manner, since it has to wait for that operation t...
Is there a way to simulate the C++ 'friend' concept in Java?
...real so that the runtime will throw a NullPointerException if it is null.
Now boys :
package montague;
import capulet.Juliet;
public class Romeo {
public static final class Love { private Love() {} }
private static final Love love = new Love();
public static void cuddleJuliet() {
...
Why do you create a View in a database?
...pected cost of fixing it later is more than the definite cost of fixing it now.
– Mr. Boy
Feb 8 '10 at 9:19
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Only using @JsonIgnore during serialization, but not deserialization
...eer's solution works for Jackson 2.6.3. This should be the accepted answer now that Jackson has been updated.
– Kent Bull
Mar 11 '16 at 0:17
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