Returning Zero When a Referenced Cell is Blank

Define an empty cell as one with no content. My Excel Toolbox includes the following dynamic array function to return its argument with empty values converted to null text (""):
    =EmptyAsText(RangeArray)
RangeArray can be a single cell like A1 or a contiguous range like A1:D9 or the result of a function like UNIQUE that returns an array of cell values.
For example, if A1 is empty
    =A1    -- returns 0
    =EmptyAsText(A1)    -- returns null text ("") which appears empty (blank)
    =ISBLANK(A1)    -- returns TRUE
    =ISBLANK(EmptyAsText(A1))    -- returns FALSE
If A1 is empty, A2 is 1, A3 is 0, and A4 is 1
    =A1:A4    -- returns an array like {0; 1; 0; 1}
    =EmptyAsText(A1:A4)    -- returns an array like {""; 1; 0; 1}
    =UNIQUE(A1:A4)    -- returns an array like {0; 1; 0}
    =EmptyAsText(UNIQUE(A1:A4))    -- returns an array like {""; 1; 0}
Notice UNIQUE(A1:A4) does not appear to return unique values. The result of EmptyAsText(UNIQUE(A1:A4)) looks like three unique values, but the one derived from an empty cell is actually null text.
The result of EmptyAsText(RangeArray) is the same size as RangeArray, but if RangeArray is an extended range (like A:D) it will be restricted so it does not exceed its worksheet's used range. If RangeArray is noncontiguous, #VALUE! is returned.
See https://sites.google.com/view/MyExcelToolbox/

Define an empty cell as one with no content and a blank cell as one that appears empty but might have content. So a blank cell might be empty, or it might contain a single apostrophe (') or space character(s) as constant text, or it might have a formula that returns null text ("") or space character(s).
With these definitions for empty and blank, My Excel Toolbox includes the following two functions:
    =IsCellEmpty(Target)
    =IsCellBlank(Target)
IsCellEmpty returns TRUE if Target is empty (no content), FALSE if not.
IsCellBlank returns TRUE if Target is blank (appears empty), FALSE if not.
If Target is a contiguous range with more than one cell, a dynamic array is returned with TRUE/FALSE corresponding to each cell in Target; if Target is an array or a noncontiguous range, #VALUE! is returned.
With these definitions for empty and blank, Excel's ISBLANK function returns TRUE for an empty cell and FALSE for a blank cell that is not empty; therefore, ISBLANK is equivalent to IsCellEmpty except ISBLANK will accept an array as well as a contiguous range. ISBLANK(Target) returns FALSE instead of #VALUE! if Target is a noncontiguous range.
The following formula is equivalent to IsCellBlank(Target)
    =(TRIM(Target)="")
where Target is a range like A1 or A1:D9; however, TRIM will accept an array as well as a contiguous range.
See https://sites.google.com/view/MyExcelToolbox/