Retrieving an Element of an Array

Retrieving an Element of an Array
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 retrieve an element of an array.

X86 assembly

Assembler: nasm

mov esi, array_offset
mov ebx, 2
mov eax, [esi+ebx*4]

ActionScript

var arr:Array = new Array(1,2,3);
var myVar:Number = arr[1];
// the value of myVar is: 2

AppleScript

on getArrayValue(array, location)
    -- very important -- The list index starts at 1 not 0
    return item location in array
end getArrayValue

C

 int array_index(int array[], int index) {
   return array[index];
 }

C#

 int getArrayValue( int values[], int index ) {
   return values[index];
 }
 

C++

 template<typename T>
 T array_index(T array[], size_t index) {
   return array[index];
 }

ColdFusion

<cfset arr = ArrayNew(1)>
<cfset arr[1] = "one">
<cfset arr[2] = "2">
<cfset arr[3] = 3>
<cfset var = arr[1]>

The value of var is "one"

ColdFusion Arrays are NOT zero-based, their index begins at 1

Common Lisp

  (defun array-value (array index)
    (aref array index))

Java

public Object getArrayElem(Object[] array, int pos) {
    return array[pos];
}

JavaScript

var element = array[index];

mIRC

Interpeter: mIRC Script Editor

Library: mArray Snippet

 alias readmyarray { echo -a $array_read(MyArray, 2, 3) }

Perl

Interpreter: Perl 5.8.8

$elem = $array[0];

PHP

$array = array('php', 'has', 'arrays');
// First element 
$elem  = $array[0];

Python

Interpreter: Python 2.5

The item is an element in a list at a given index

 item = aList[index]

or

To use a list like a stack be it FIFO/LIFO

 aList.pop()  # Pop last item in a list
 aList.pop(0) # Pop first item in a list

Note: When using the pop() method, the element is removed from the list.

Ruby

 ary = ['Ruby','rules','big','time']
 #the first element
 element = ary[0]
 #or
 element = ary.first
 # => element = 'Ruby'

 #the last element
 element = ary[-1]
 #or
 element = ary.last
 # => element = 'time'

 #retrieving different values at once
 elements = ary.values_at(0,2,3)
 # => elements = ['Ruby','big','time']

 #select the first element of length 3
 element = ary.find{|el|el.length==3}
 # => element = "big"

Smalltalk

  "Retrieve second element of an array"
  index := 2
  element := anArray at: index