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Why does Java's hashCode() in String use 31 as a multiplier?
Per the Java documentation, the hash code for a String object is computed as:
13 Answers
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(![]+[])[+[]]… Explain why this works
...ition, an empty Array, [], this is made just to convert the false value to String, because the string representation of an empty array is just an empty string, is equivalent to:
false+[]; // "false"
false+''; // "false"
The last part, the pair of square brackets after the parentheses, they are th...
Is it possible to deserialize XML into List?
...")]
public Int32 Id { get; set; }
[XmlElement("name")]
public String Name { get; set; }
}
static class Program
{
static void Main()
{
XmlSerializer ser= new XmlSerializer(typeof(UserList));
UserList list = new UserList();
list.Items.Add(new User { Id = 1...
How to apply multiple styles in WPF
...es, my first approach was to create a constructor that takes any number of strings using the “params” keyword:
public MultiStyleExtension(params string[] inputResourceKeys)
{
}
My goal was to be able to write the inputs as follows:
<Button Style="{local:MultiStyle BigButtonStyle, GreenBut...
Passing enum or object through an intent (the best solution)
...N 1:
public enum AwesomeEnum {
SOMETHING, OTHER;
private static final String name = AwesomeEnum.class.getName();
public void attachTo(Intent intent) {
intent.putExtra(name, ordinal());
}
public static AwesomeEnum detachFrom(Intent intent) {
if(!intent.hasExtra(name)) throw new Ill...
Java int to String - Integer.toString(i) vs new Integer(i).toString()
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Integer.toString calls the static method in the class Integer. It does not need an instance of Integer.
If you call new Integer(i) you create an instance of type Integer, which is a full Java object encapsulating the value of your int...
Looking for jQuery find(..) method that includes the current node
...
@ronen An extra file for something which can be done in one line? Thanks, but no thanks.
– user659025
Nov 18 '15 at 14:58
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Sqlite: CURRENT_TIMESTAMP is in GMT, not the timezone of the machine
..., row-size and caching if a datetime value is a 64bit integer vs. a 20byte string
– Falco
Aug 27 at 9:59
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How to pass the values from one activity to previous activity
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Intent resultIntent = new Intent();
resultIntent.putExtra(PUBLIC_STATIC_STRING_IDENTIFIER, enteredTextValue);
setResult(Activity.RESULT_OK, resultIntent);
finish();
The final step is in the calling Activity: Override onActivityResult to listen for callbacks from the text entry Activity. Get the...
iOS app error - Can't add self as subview
...NavigationController+Consistent.h"
#import <objc/runtime.h>
/// This char is used to add storage for the isPushingViewController property.
static char const * const ObjectTagKey = "ObjectTag";
@interface UINavigationController ()
@property (readwrite,getter = isViewTransitionInProgress) BOOL ...