Creating an Array: Difference between revisions
Line 85: | Line 85: | ||
For a single dimension array with 10 elements: |
For a single dimension array with 10 elements: |
||
$array = array(1, 2, 3, 4, 5, 6, 7, 8, 9, 10) //$array[3] == 3 |
$array = array(1, 2, 3, 4, 5, 6, 7, 8, 9, 10) //$array[3] == 3 |
||
$array = array("a", "b", "c", "d", "e", "f", "g", "h", "i", "j") //$array[3] == "c" |
$array = array("a", "b", "c", "d", "e", "f", "g", "h", "i", "j") //$array[3] == "c" |
||
Revision as of 11:59, 23 January 2007
![Task](http://static.miraheze.org/rosettacodewiki/thumb/b/ba/Rcode-button-task-crushed.png/64px-Rcode-button-task-crushed.png)
You are encouraged to solve this task according to the task description, using any language you may know.
In this task, the goal is to create an array.
mIRC
Interpeter: mIRC Script Editor Libraries: mArray Snippet
alias creatmearray { .echo -a $array_create(MyArray, 5, 10) }
Visual Basic .Net
Compiler: Visual Studio .NET 2005
Dim myArray as new ArrayList Dim myArray2 as new ArrayList = { "Item1", "Item2" }
BASIC
Interpeter: QuickBasic 4.5, PB 7.1
' $DYNAMIC DIM SHARED myArray(-10 TO 10, 10 TO 30) AS STRING REDIM SHARED myArray(20, 20) AS STRING myArray(1,1) = "Item1" myArray(1,2) = "Item2"
JavaScript
var myArray = new Array(); var myArray2 = new Array("Item1","Item2"); var myArray3 = ["Item1", "Item2"];
3DS Max 8 - MaxScript
myArray = #() myArray2 = #("Item1", "Item2")
Python
Interpeter: Python 2.3, 2.4, 2.5 Libraries: None are needed
Array=[ [0,0,0,0,0,0], [1,1,1,1,1,1], [2,2,2,2,2,2], [3,3,3,3,3,3] ] #You would call the array by this code. This will call the 3rd 1 on the second list Array[1][3]
Alternatively you can create it programmatically with a list comprehension:
Array = [ [i]*6 for i in range(4) ]
Create an empty array:
Array = []
Perl
Interpeter: Perl Libraries: None are needed
use vars qw{ @Array };
@Array=( [0,0,0,0,0,0], [1,1,1,1,1,1], [2,2,2,2,2,2], [3,3,3,3,3,3] ); #You would call the array by this code. This will call the 3rd 1 on the second list print $Array[1][3];
# Alternative: my @array_using_qw = qw/coffee sugar cream/;
# Alternative: my @Array3 = (); push @Array3, "Item1"; push @Array3, "Item2"; $Array3[2] = "Item3"; $Array3[3][0] = "Item4";
@Array = ('This', 'That', 'And', 'The', 'Other');
$ArrayRef = ['This', 'That', 'And', 'The', 'Other']; print $ArrayRef->[2]; # would print "And"
PHP
For a single dimension array with 10 elements:
$array = array(1, 2, 3, 4, 5, 6, 7, 8, 9, 10) //$array[3] == 3 $array = array("a", "b", "c", "d", "e", "f", "g", "h", "i", "j") //$array[3] == "c"
For a multi-dimension array:
$array = array( array(0, 0, 0, 0, 0, 0), array(1, 1, 1, 1, 1, 1), array(2, 2, 2, 2, 2, 2), array(3, 3, 3, 3, 3, 3) ); #You would call the array by this code. This will call the 3rd 1 on the second list echo $array[1][3];
Ruby
my_array = Array.new # This is the most basic way to create an empty one-dimensional array in Ruby.
array = [ [0, 0, 0, 0, 0, 0], [1, 1, 1, 1, 1, 1], [2, 2, 2, 2, 2, 2], [3, 3, 3, 3, 3, 3] ] # You would call the array by this code. This will call the 3rd 1 on the second list array[1][3]
# You can also create a sequential array from a range using the 'splat' operator: array = [*0..3] # or use the .to_a method for Ranges array = (0..3).to_a #=> [0,1,2,3] # This lets us create the above programmatically: array = [*0..3].map {|i| [i] * 6} # or use the .map (.collect which is the same) method for Ranges directly # note also that arrays of length 6 with a default element are created using Array.new array = (0..3).map {|i| Array.new(6,i)} #=> [[0, 0, 0, 0, 0, 0], [1, 1, 1, 1, 1, 1], [2, 2, 2, 2, 2, 2], [3, 3, 3, 3, 3, 3]]
Ada
Compiler: GCC 4.1.2
type Arr is array (Positive range <>) of Integer; Uninitialized : Arr (1 .. 10); Initialized_1 : Arr (1 .. 20) := (others => 1); Initialized_2 : Arr := (1 .. 30 => 2); Const : constant Arr := (1 .. 10 => 1, 11 .. 20 => 2, 21 | 22 => 3);
OCaml
let nbItems = 5 and initialValue = 0 in make_vect nbItems initialValue
Java
For example for an array of 10 int values:
int[] intArray = new int[10];
Creating an array of Strings:
String[] s = {"hello" , "World" };
C
Compiler: GCC, MSVC, BCC, Watcom
Libraries: None are needed
// Dynamic int n = 10 * sizeof(int); int *myArray = (int*)malloc(n); if(myArray != NULL) { memset(myArray, 0, n); myArray[0] = 1; myArray[1] = 2; free(myArray); myArray = NULL; }
Libraries: None are needed
// Static int myArray2[10] = { 1, 2, 0}; /* 3..9 := 0 */
C++
Compiler: GCC, MSVC, BCC, Watcom
Libraries: None are needed
// Dynamic const int n = 10; int* myArray = new int[n]; if(myArray != NULL) { myArray[0] = 1; myArray[1] = 2; delete[] myArray; myArray = NULL; }
Libraries: None are needed
// Static int myArray2[10] = { 1, 2, 0}; /* 3..9 := 0 */
Libraries: STL
// STL std::vector<int> myArray3(10); myArray3.push_back(1); myArray3.push_back(2);
Libraries: Qt
// Qt QVector<int> myArray4(10); myArray4.push_back(1); myArray4.push_back(2);
Libraries: MFC
// MFC CArray<int,int> myArray5(10); myArray5.Add(1); myArray5.Add(2);
C#
Example of array of 10 int types:
int[] numbers = new int[10];
Example of array of 3 string types:
string[] words = { "these", "are", "arrays" };
You can also declare the size of the array and initialize the values at the same time:
int[] more_numbers = new int[3]{ 21, 14 ,63 };
For Multi-Deminsional arrays you delcare them the same except for a comma in the type declaration.
The following creates a 3x2 int matrix
int[,] number_matrix = new int[3][2];
As with the previous examples you can also initialize the values of the array, the only difference being each row in the matrix must be enclosed in its own braces.
string[,] string_matrix = { {"I","swam"}, {"in","the"}, {"freezing","water"} };
or
string[,] funny_matrix = new string[2][2]{ {"clowns", "are"} , {"not", "funny"} };