Sometimes you want to add an element to the beginning of an array without modifying any of the current elements (order) within the array. Whenever this is the case, you can use array_unshift().
array_unshift() prepends passed elements to the front of the array.
Note that the list of elements is ...
void doSomething(String... strings) {
for (String s : strings) {
System.out.println(s);
}
}
The three periods after the final parameter's type indicate that the final argument may be passed as an array or as a sequence of arguments. Varargs can be used only in the final argume...
Access ModifierVisibilityInheritancePrivateClass onlyCan't be inheritedNo modifier / PackageIn packageAvailable if subclass in packageProtectedIn packageAvailable in subclassPublicEverywhereAvailable in subclass
There was once a private protected (both keywords at once) modifier that could be appli...
Using Razor @functions keyword gives the capability of introducing classes and methods for inline use within a Razor file:
@functions
{
string GetCssClass(Status status)
{
switch (status)
{
case Status.Success:
return "alert-success&qu...
A class can have members.
Instance variables can be declared with/without type annotations, and optionally initialized. Uninitialised members have the value of null, unless set to another value by the constructor.
class Foo {
var member1;
int member2;
String member3 = "Hello world!&q...
For instance, two tables are given,
T1
id x y
8 42 1.9
9 30 1.9
T2
id signal
8 55
8 56
8 59
9 57
9 58
9 60
The goal is to get the new table T3:
id x y s1 s2 s3
8 42 1.9 55 ...
To get Unix Epoch Time, use the constant timeIntervalSince1970:
Swift
let date = NSDate() // current date
let unixtime = date.timeIntervalSince1970
Objective-C
NSDate *date = [NSDate date]; // current date
int unixtime = [date timeIntervalSince1970];
When creating Random instances with the same seed, the same numbers will be generated.
int seed = 5;
for (int i = 0; i < 2; i++)
{
Console.WriteLine("Random instance " + i);
Random rnd = new Random(seed);
for (int j = 0; j < 5; j++)
{
Console.Write(rnd.Next(...
There are three visibility types that you can apply to methods (class/object functions) and properties (class/object variables) within a class, which provide access control for the method or property to which they are applied.
You can read extensively about these in the PHP Documentation for OOP Vi...
Definition : When multiple methods with the same name are declared with different parameters, it is referred to as method overloading. Method overloading typically represents functions that are identical in their purpose but are written to accept different data types as their parameters.
Factors af...
Oracle supports DATE (includes time to the nearest second) and TIMESTAMP (includes time to fractions of a second) datatypes, which allow arithmetic (addition and subtraction) natively. For example:
To get the next day:
select to_char(sysdate + 1, 'YYYY-MM-DD') as tomorrow from dual;
To get the ...
Table file with header, footer, row names, and index column:
file: table.txt
This is a header that discusses the table file
to show space in a generic table file
index name occupation
1 Alice Salesman
2 Bob Engineer
3 Charlie Janitor
This is a footer becaus...
Occasionally you'd want to catch an exception and throw it from a different thread or method while preserving the original exception stack. This can be done with ExceptionDispatchInfo:
using System.Runtime.ExceptionServices;
void Main()
{
ExceptionDispatchInfo capturedException = null;
...
Whenever a Python script is invoked from the command line, the user may supply additional command line arguments which will be passed on to the script. These arguments will be available to the programmer from the system variable sys.argv ("argv" is a traditional name used in most programmi...
Messages printed from NSLog are displayed on Console.app even in the release build of your app, which doesn't make sense for printouts that are only useful for debugging. To fix this, you can use this macro for debug logging instead of NSLog.
#ifdef DEBUG
#define DLog(...) NSLog(__VA_ARGS__)
#els...
To use Leaflet, load its stylesheet and JavaScript file to your page:
<link rel="stylesheet" href="/css/leaflet.css" />
<script src="/js/leaflet.js"></script>
These resources can be downloaded from a variety of locations such as Leaflet's homepage...
