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Finding duplicates in O(n) time and O(1) space
...ns in O(N) time. A swap only occurs if there is an i such that A[i] != i, and each swap sets at least one element such that A[i] == i, where that wasn't true before. This means that the total number of swaps (and thus the total number of executions of the while loop body) is at most N-1.
The seco...
What is the logic behind the “using” keyword in C++?
...aration. The
identifier following the using keyword becomes a typedef-name and the
optional attribute-specifier-seq following the identifier appertains
to that typedef-name. It has the same semantics as if it were
introduced by the typedef specifier. In particular, it does not define
a new type and ...
Android global variable
...
You can extend the base android.app.Application class and add member variables like so:
public class MyApplication extends Application {
private String someVariable;
public String getSomeVariable() {
return someVariable;
}
...
LISTAGG in Oracle to return distinct values
...0. Thanks to this post here by user3465996
select col1 ,
dbms_xmlgen.convert( -- HTML decode
dbms_lob.substr( -- limit size to 4000 chars
ltrim( -- remove leading commas
REGEXP_REPLACE(REPLACE(
REPLACE(
XMLAGG(
XMLELEMENT("A",col2 )
...
Should I use static_cast or reinterpret_cast when casting a void* to whatever
... fact that every use of reinterpret_cast is downright dangerous because it converts anything to anything else really (for pointers), while static_cast is much more restrictive, thus providing a better level of protection. This has already saved me from bugs where I accidentally tried to coerce one p...
Creating a custom JButton in Java
Is there a way to create a JButton with your own button graphic and not just with an image inside the button?
5 Answers
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WebAPI Multiple Put/Post parameters
...ost multiple parameters on a WebAPI controller. One param is from the URL, and the other from the body. Here is the url:
/offers/40D5E19D-0CD5-4FBD-92F8-43FDBB475333/prices/
...
Using Enums while parsing JSON with GSON
...
From the documentation for Gson:
Gson provides default serialization and deserialization for Enums... If you would prefer to change the default representation, you can do so by registering a type adapter through GsonBuilder.registerTypeAdapter(Type, Object).
Following is one such approach.
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Is AsyncTask really conceptually flawed or am I just missing something?
...nnot believe that a class that flawed in design made it into the framework and no-one is talking about it, so I guess I just must be missing something.
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SQL Server Output Clause into a scalar variable
...
You need a table variable and it can be this simple.
declare @ID table (ID int)
insert into MyTable2(ID)
output inserted.ID into @ID
values (1)
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