Retrieving an Element of an Array: Difference between revisions
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==[[Ruby]]== |
==[[Ruby]]== |
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ary = ['Ruby','rules','big','time'] |
ary = ['Ruby','rules','big','time'] |
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#the first element |
#the first element |
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element = ary[0] |
element = ary[0] |
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#or |
#or |
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element = ary.first |
element = ary.first |
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# => element = 'Ruby' |
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#the last element |
#the last element |
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#or |
#or |
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element = ary.last |
element = ary.last |
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# => element = 'time' |
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#retrieving different values at once |
#retrieving different values at once |
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elements = ary.values_at(0,2,3) |
elements = ary.values_at(0,2,3) |
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# => elements = ['Ruby','big','time'] |
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#select the first element of length 3 |
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element = ary.find{|el|el.length==3} |
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# => element = "big" |
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==x86 assembly== |
==x86 assembly== |
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'''Assembler:''' nasm |
'''Assembler:''' nasm |
Revision as of 22:08, 22 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.
mIRC
Interpeter: mIRC Script Editor Library: mArray Snippet
alias readmyarray { echo -a $array_read(MyArray, 2, 3) }
C
int array_index(int array[], int index) { return array[index]; }
C++
template <class T> T array_index(T *array, int index) { return array[index]; }
C#
int getArrayValue( int values[], int index ) { return values[index]; }
Common Lisp
(defun array-value (array index) (aref array index))
Perl
Interpreter: Perl 5.8.8
$elem = $array[0];
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"
x86 assembly
Assembler: nasm
mov esi, array_offset mov ebx, 2 mov eax, [esi+ebx*4]