asp dynamic array[reprint]

The ASP array mentioned in this article refers to the array using the default language VBScript as the language in ASP.

example:

DimMyArray()

for i = 0 to 10

ReDim Preserve MyArray(i)

MyArray(i)=i

next

subscript

• The subscripts of ASP arrays also start from 0.
• To get the value of a certain element, add parentheses after the array variable. The subscript value is marked in the parentheses, such as arr(0). Note that it is not square brackets, but small brackets.

definition

dim arr2(2) 'Define static array

Adding parentheses after the variable name creates an array. If a value is specified in the brackets, it means defining a static array, that is, a fixed-size array.

in code

• arr() defines a dynamic array, which needs to be redefined to determine the length before it can be used. Please see below for redefinition.
• arr2(2) defines a static array with a subscript upper limit of 2 (length 3), which is different from other languages ​​(such as C#, JavaScript). The parameters in parentheses in other languages ​​indicate the length.

erase

When erasing a dynamic array, the storage space of the dynamic array is released; when erasing a static array, it only initializes the element values ​​of the array.

redim arr(2)

erase arr

alert(ubound(arr))' error, erase has released all the storage space of the dynamic array.

dim arr(1)

erase arr

alert(ubound(arr))' displays 1, erase only initializes the element value of the static array, and the space it occupies is still there.