The column letter to convert.
Optional. If true, the function will return a zero-indexed column number. Default is false.
The column number corresponding to the input column letter.
Will throw an error if the input column letter is invalid.
letterToCol('A');;
//=> 1
letterToCol('Z');;
//=> 26
letterToCol('AA');;
//=> 27
letterToCol('AB', true);;
//=> 27
Generated using TypeDoc
Converts a column letter (e.g., A, B, C, ..., Z, AA, AB, ...) to a column number.