Convert numbers to letters beyond the 26 character alphabet

问题:

I'm creating some client side functions for a mappable spreadsheet export feature.

I'm using jQuery to manage the sort order of the columns, but each column is ordered like an Excel spreadsheet i.e. a b c d e......x y z aa ab ac ad etc etc

How can I generate a number as a letter? Should I define a fixed array of values? Or is there a dynamic way to generate this?

回答1:

I think you're looking for something like this

    function colName(n) {         var ordA = 'a'.charCodeAt(0);         var ordZ = 'z'.charCodeAt(0);         var len = ordZ - ordA + 1;                var s = "";         while(n >= 0) {             s = String.fromCharCode(n % len + ordA) + s;             n = Math.floor(n / len) - 1;         }         return s;     }  // Example:      for(n = 0; n ");

回答2:

You can use code like this, assuming that numbers contains the numbers of your columns. So after this code you'll get the string names for your columns:

var letters = ['a', 'b', 'c', ..., 'z']; var numbers = [1, 2, 3, ...]; var columnNames = []; for(var i=0;i

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