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栈和队列的面试题Java实现 - 更多技术 - 清泛网 - 专注C/C++及内核技术
... public Node current;
//方法：入栈操作
public void push(int data) {
if (head == null) {
head = new Node(data);
current = head;
} else {
Node node = new Node(data);
node.pre = current;//current结点将作为当...
What is the purpose of std::make_pair vs the constructor of std::pair?
...e from http://www.cplusplus.com/reference/std/utility/make_pair/
pair <int,int> one;
pair <int,int> two;
one = make_pair (10,20);
two = make_pair (10.5,'A'); // ok: implicit conversion from pair<double,char>
Aside from the implicit conversion bonus of it, if you didn't use make...
Difference between a Structure and a Union
... once.
To give a concrete example of their use, I was working on a Scheme interpreter a little while ago and I was essentially overlaying the Scheme data types onto the C data types. This involved storing in a struct an enum indicating the type of value and a union to store that value.
union foo {...
What is C# analog of C++ std::pair?
I'm interested: What is C#'s analog of std::pair in C++? I found System.Web.UI.Pair class, but I'd prefer something template-based.
...
Get battery level and state in Android
...mation.
To sum it up, a broadcast receiver for the ACTION_BATTERY_CHANGED intent is set up dynamically, because it can not be received through components declared in manifests, only by explicitly registering for it with Context.registerReceiver().
public class Main extends Activity {
private Tex...
Get screen width and height in Android
...rics();
getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
int height = displayMetrics.heightPixels;
int width = displayMetrics.widthPixels;
In a view you need to do something like this:
((Activity) getContext()).getWindowManager()
.getDefaultDisplay()
...
How do you specify that a class property is an integer?
...nd in the process of creating a class with an "ID" field that should be an integer, I have gotten a little confused.
8 Answ...
Breaking out of a nested loop
...o, but that is ugly, and not always possible. You can also place the loops into a method (or an anon-method) and use return to exit back to the main code.
// goto
for (int i = 0; i < 100; i++)
{
for (int j = 0; j < 100; j++)
{
goto Foo; // yeuck!
...
Enum “Inheritance”
... @zionpi yes but note that (I believe) the standard switch gets compiled into same IL code as a full if, else if, else block would: which I think has a better better syntax anyway. You do loose ability for resharper / VS to autocomplete all the case statements, but I think that's not the end of th...
How to create a sub array from another array in Java?
...
You can use
JDK > 1.5
Arrays.copyOfRange(Object[] src, int from, int to)
Javadoc
JDK <= 1.5
System.arraycopy(Object[] src, int srcStartIndex, Object[] dest, int dstStartIndex, int lengthOfCopiedIndices);
Javadoc
...