CMatrix:Exists

CMatrix:Exists

The Exists method returns true if a CMatrix member exists with the specified indices.

Syntax

bSuccess = CMatrix:Exists( row, col )

row,col is the index of the member to test.
If the member is initialized, this method returns true.
If not initialized, false is returned.

Remarks

If you use Init then the first n x m members are set and this function will return true if tested with an index in range. Otherwise, members are uninitialized if you do not Set them or if you Remove them.

Example

The following script fragment tests whether the matrix member at index [2][2] has been initialized:

M = CMatrix:new()	-- create a CMatrix
M:Set( 1, 3, 0.112 )	-- set member [1][3]
M:Set( 2, 4, 5.5 )	-- set member [2][4]
if ( M:Exists(2,2) ) then s = "yes"	-- has member [2][2] been set?
else s = "no" end
Printf("M[2][2] exists= %s", s)	-- result: M[2][2] exists= no