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What exactly does big Ө notation represent?
...lanation
O(n) is asymptotic upper bound. If T(n) is O(f(n)), it means that from a certain n0, there is a constant C such that T(n) <= C * f(n). On the other hand, big-Omega says there is a constant C2 such that T(n) >= C2 * f(n))).
Do not confuse!
Not to be confused with worst, best and avera...
How to convert an Array to a Set in Java
...t.of(someArray);
In Java 10+, the generic type parameter can be inferred from the arrays component type:
var mySet = Set.of(someArray);
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Why would you use String.Equals over ==? [duplicate]
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It's entirely likely that a large portion of the developer base comes from a Java background where using == to compare strings is wrong and doesn't work.
In C# there's no (practical) difference (for strings) as long as they are typed as string.
If they are typed as object or T then see other ...
What is the purpose of @SmallTest, @MediumTest, and @LargeTest annotations in Android?
...pment?
You can run a group of tests annotated with specific annotation.
From AndroidJUnitRunner documentation:
Running a specific test size i.e. annotated with SmallTest or MediumTest or LargeTest:
adb shell am instrument -w -e size [small|medium|large] com.android.foo/android.support.t...
How to only get file name with Linux 'find'?
...ical to the -exec primary with the exception that utility will be executed from the directory that holds the current file.
When used + instead of ;, then {} is replaced with as many pathnames as possible for each invocation of utility. In other words, it'll print all filenames in one line.
...
How to unit test abstract classes: extend with stubs?
...se them just for testing. They usually are very very very minimal (inherit from the abstract class) and not more.Then, in your Unit Test you can call the abstract method you want to test.
You should test abstract class that contain some logic like all other classes you have.
...
How should I call 3 functions in order to execute them one after the other?
...ideo on YouTube: youtube.com/watch?v=y5mltEaQxa0 - and wrote up the source from the video here drive.google.com/file/d/1NrsAYs1oaxXw0kv9hz7a6LjtOEb6x7z-/… There are some more nuances like the catch missing in this example that this elaborates on. (use a different id in the getPostById() line or tr...
Regular expression for letters, numbers and - _
...ink that you need a little more. Note this doesn't match legal file names from a system perspective. That would be system dependent and more liberal in what it accepts. This is intended to match your acceptable patterns.
^([a-zA-Z0-9]+[_-])*[a-zA-Z0-9]+\.[a-zA-Z0-9]+$
Explanation:
^ Match th...
Sequence-zip function for c++11?
...ers are not the same (it may crash or iterate beyond the end).
Starting from Boost 1.56.0 (2014 Aug 7) you could use boost::combine (the function exists in earlier versions but undocumented):
#include <boost/range/combine.hpp>
#include <vector>
#include <list>
#include <stri...
iOS app, programmatically get build version
..."Contact Us" button, I use this code to get a formatted HTML on the e-mail from the user. It gives me all the info that I need to start helping solving any issue:
struct utsname systemInfo;
uname(&systemInfo);
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
NSDate *date = [NSDat...