Retrieving an Element of an Array: Difference between revisions
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(Java - there it is pretty simple eh!!) |
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In this task, the goal is to retrieve an element of an [[array]]. |
In this task, the goal is to retrieve an element of an [[array]]. |
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==[[AppleScript]]== |
==[[AppleScript]]== |
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(defun array-value (array index) |
(defun array-value (array index) |
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(aref array index)) |
(aref array index)) |
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[[Category:Java]] |
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==[[mIRC]]== |
==[[mIRC]]== |
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# => element = "big" |
# => element = "big" |
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==Smalltalk== |
==[[Smalltalk]]== |
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[[Category:SmallTalk]] |
[[Category:SmallTalk]] |
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index := 2 |
index := 2 |
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element := anArray at: index |
element := anArray at: index |
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Revision as of 10:26, 25 January 2007
Retrieving an Element of an Array
You are encouraged to solve this task according to the task description, using any language you may know.
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]
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]; }
Common Lisp
(defun array-value (array index) (aref array index))
Java
public Object getArrayElem(Object[] array, int pos) { return array[pos]; }
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