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Test if object implements interface
... work in a NullPointerException safe way. For example:
if ("" instanceof java.io.Serializable) {
// it's true
}
yields true. Since:
if (null instanceof AnyType) {
// never reached
}
yields false, the instanceof operator is null safe (the code you posted isn't).
instanceof is th...
How to create Android Facebook Key Hash?
.... I have been able to navigate to the folder containing the keytool in the Java SDK. Although I keep getting the error openssl not recognised as an internal or external command. The problem is even if I can get this to work, what would I do and with what afterwards?
...
Fastest way to determine if an integer's square root is an integer
...e (C/C++). Your results may vary, especially because I don't know how the Java factor will play out.
My approach is threefold:
First, filter out obvious answers. This includes negative numbers and looking at the last 4 bits. (I found looking at the last six didn't help.) I also answer yes for...
What __init__ and self do on Python?
...what if you put x = 'Hello' outside init but inside the class? is it like java where it's the same, or does it become like a static variable which is only initialised once?
– Jayen
Apr 9 '12 at 0:41
...
Detecting programming language from a snippet
... occur with certain frequencies in a text it's likely that the language is Java etc. But I don't think you will get anything that is completely fool proof, as you could name for example a variable in C the same name as a keyword in Java, and the frequency analysis will be fooled.
If you take it up ...
What is the difference between Collections.emptyList() and Collections.EMPTY_LIST
In Java, we have Collections.emptyList() and Collections.EMPTY_LIST . Both have the same property:
4 Answers
...
Is there a way for non-root processes to bind to “privileged” ports on Linux?
...
Yes @C.Ross since it would have to be applied to /usr/bin/java and then would open the capability to any java app running on the system. Too bad capabilities cannot also be set per-user.
– joeytwiddle
Aug 15 '13 at 11:02
...
Why do we need private subnet in VPC?
... data transfer charges for all data transferred via the NAT gateway) = $47.98
t2.nano instance configured as a NAT instance = $4.84/month ($0.0065 * 744 hours in a month) + $10 ($.10/GB standard AWS data transfer charges for all data transferred via the NAT instance) = $14.84
This of course change...
Why would you use an ivar?
...un", (cft * 10000000000.0) / kRuns);
Output:
1: 23.0 picoseconds/run
2: 98.4 picoseconds/run
This is 4.28 times slower and this was a non-atomic primitive int, pretty much the best case; most other cases are even worse (try an atomic NSString * property!). So if you can live with the fact that ...
Elasticsearch query to return all records
...btained page
https://gist.github.com/drorata/146ce50807d16fd4a6aa
Using java client
import static org.elasticsearch.index.query.QueryBuilders.*;
QueryBuilder qb = termQuery("multi", "test");
SearchResponse scrollResp = client.prepareSearch(test)
.addSort(FieldSortBuilder.DOC_FIELD_NAM...