| Array |
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typedict |
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An
Array
is a one-dimensional heterogeneous collection of objects.
Elements in an array can be accessed by numeric index using familiar
subscript or pointer notation:
array[0] *array array[i+j] *(array+i+j)
Array elements are uninitialized until they are assigned a value,
either by an initializer in a declaration or by an explicit assignment
statement.
The first value assigned to an array element determines its type.
Try to use an uninitialized element and you will get an
undefined
error.
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| Example: |
The program,
import yoix.stdio.*;
Array a1[3];
a1[1] = "This is a test";
Array a2[5] = {1, "hello", 0.5};
Array a3 = {1, 2, new Array {3, 4}, new Object};
printf("a1=%O\na2=%O\na3=%.2O\n", a1, a2, a3);
creates three arrays, initializes some of the elements, and then prints
a1=Array[3:0]
>--uninitialized--
^"This is a test"
--uninitialized--
a2=Array[5:0]
>1
^"hello"
0.5
--uninitialized--
--uninitialized--
a3=Array[4:0]
>1
2
Array[2:0]
>3
4
NULL:POINTER
on standard output.
Notice how we used the
%O
format to get a quick dump of the arrays and added precision to
the format to get a full dump of the last array.
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| See Also: |
Dictionary,
getArrayBands,
Hashtable,
isArray,
String,
Vector
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