NetLinx Programming Overview
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NetLinx Programming Language Reference Guide
CHAR TV_CHAN[11] = {2, 3, 4, 5, 8, 11, 13, 21, 27, 33, 39}
CHAR TV_CHAN[] = {2, 3, 4, 5, 8, 11, 13, 21, 27, 33, 39}
Multi-dimensional arrays allow multiple collections of data. NetLinx allows up to five array dimensions;
array size is limited only by available memory. A two-dimensional array is a collection of single
dimensional arrays. Three-dimensional arrays are collections of two-dimensional arrays. Here are
examples of multi-dimensional arrays:
INTEGER NUM1D[10] (* [COLUMN] *)
INTEGER NUM2D[5][10] (* [ROW][COLUMN] *)
INTEGER NUM3D[2][5][10] (* [TABLE][ROW][COLUMN] *)
NUM3D[1] refers to the 1st table
NUM3D[1][4] refers to the 4th row of the 1st table
NUM3D[1][3][7] refers to the 7th column of the 3rd row of the 1st table
CHAR NAME[16] (* [PRESET NAME] *)
CHAR PRESET[10][16] (* [PRESET NUM][PRESET NAME] *)
CHAR USER_PRESET[10][10][16] (* [USER][PRESET NUM][PRESET NAME] *)
CHAR USER_PRESET[10][10][16] allows you to define tables that can store ten 16-character preset
names for ten users. With Axcess, you would either store ten two-dimensional arrays or index one two-
dimensional array (
USER_PRESET[100][16]). For example, the fifth user would occupy
USER_PRESET[41] through USER_PRESET[50].
It is sometimes difficult for people to envision multi-dimensional arrays beyond three-dimensions. We
sometimes try to define the arrays spatially, as in a three-dimensional array. If we take the approach of
cascading arrays, it is easier to understand. Using the previous example of defining user presets, you can
expand the array to five dimensions by classifying the preset name by location and department. For
example: AMX has three domestic locations; each location has a sales team, a professional services team
and a tech support team; each team has a maximum of ten employees; each employee has the ability to
store 10 preset names; each preset name can have up to 16 characters. The array would look like this:
CHAR USER_PRESET[3][3][10][10][16]
(*[LOCATION][DEPT][USER][PRESET][NAME]*)
NetLinx has a new set of functions to better deal with arrays. LENGTH_ARRAY and
MAX_LENGTH_ARRAY determine the effective length and defined length of an array. When used with
multi-dimensional arrays,
LENGTH_ARRAY and MAX_LENGTH_ARRAY return the lengths associated
with the level of the array supplied as the argument. For example:
INTEGER NUM_LIST [10] = {1, 2, 3, 4, 5}
LEN = MAX_LENGTH_ARRAY (NUM_LIST) (* LEN = 10 *)
LEN = LENGTH_ARRAY (NUM_LIST) (* LEN = 5 *)
INTEGER NEW_LIST[] = {10, 20, 30, 40}
LEN = MAX_LENGTH_ARRAY (NEW_LIST) (* LEN = 4 *)
LEN = LENGTH_ARRAY (NEW_LIST) (* LEN = 4 *)
INTEGER MULTI_LIST[4][10] = { {1, 2, 3}, {4, 5, 6, 7}, {8, 9} }
LEN = MAX_LENGTH_ARRAY (MULTI_LIST[2]) (* LEN = 10 *)
LEN = LENGTH_ARRAY (MULTI_LIST[2]) (* LEN = 4 *)
LEN = MAX_LENGTH_ARRAY (MULTI_LIST) (* LEN = 4 *)
LEN = LENGTH_ARRAY (MULTI_LIST) (* LEN = 3 *)
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