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Printing 1 to 1000 without loop or conditionals
Task : Print numbers from 1 to 1000 without using any loop or conditional statements. Don't just write the printf() or cout statement 1000 times.
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Base64 encoding and decoding in client-side Javascript
...JavaScript');
// If we don't use toString(), JavaScript assumes we want to convert the object to utf8.
// We can make it convert to other formats by passing the encoding type to toString().
var s = b.toString('base64');
And here is how you decode base64 encoded strings:
var b = new Buffer('SmF2YVNj...
Input text dialog Android
When a user clicks a Button in my App (which is printed in a SurfaceView ), I'd like a text Dialog to appear and I would like to store the result in a String . I'd like the text Dialog to overlay the current screen. How can I do this?
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How to manage REST API versioning with spring?
...versions using Spring 3.2.x, but I haven't find anything that is easy to maintain. I'll explain first the problem I have, and then a solution... but I do wonder if I'm re-inventing the wheel here.
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How to parse Excel (XLS) file in Javascript/HTML5
...with it. I need to read xls file row-wise, read data in every column and convert it to JSON.
11 Answers
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Why does this go into an infinite loop?
...e in this answer for purposes of illustration, since C# allows you to pass int parameters by reference with the ref keyword. I've decided to update it with actual legal Java code using the first MutableInt class I found on Google to sort of approximate what ref does in C#. I can't really tell if tha...
List columns with indexes in PostgreSQL
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Create some test data...
create table test (a int, b int, c int, constraint pk_test primary key(a, b));
create table test2 (a int, b int, c int, constraint uk_test2 unique (b, c));
create table test3 (a int, b int, c int, constraint uk_test3b unique (b), constraint uk_te...
How to pass a function as a parameter in Java? [duplicate]
...Java 8 and above
Using Java 8+ lambda expressions, if you have a class or interface with only a single abstract method (sometimes called a SAM type), for example:
public interface MyInterface {
String doSomething(int param1, String param2);
}
then anywhere where MyInterface is used, you can ...
Writing your own STL Container
... typedef typename A::reference reference;
typedef typename A::pointer pointer;
typedef std::random_access_iterator_tag iterator_category; //or another tag
iterator();
iterator(const iterator&);
~iterator();
iterator& operator=(const iterat...
Using arrays or std::vectors in C++, what's the performance gap?
...sing the array around will lose any information about its size (array to pointer conversion). You should use boost::array in that case, which wraps a C++ array in a small class and provides a size function and iterators to iterate over it.
Now the std::vector vs. native C++ arrays (taken from the i...