Working with javascript method

Question

To get a value like '4,3' I have this:

var value = objeto.row(4).cell(3);

What's the correct form to develop the js method? I suppose I have to do something like that:

function objeto(rowIndex){
   cell: function(cellIndex){
      return rowIndex + ',' + cellIndex;
   }
}

I know it doesn't work, it is only a guess. Thank you...

Are you asking how to write code so that you can use the syntax in the first bit of code you provided to get "4,3"? — STT
– STT, Commented Oct 8, 2014 at 13:32
You have to add 2 methods to objeto prototype: row() will set the this.row value and return this, and cell() will return this.row + "," + this.cell. I guess. — Romeo
– Romeo, Commented Oct 8, 2014 at 13:33
you simple forget row, so you need something like this: var objeto = { row : function (rowIndex){ return { cell : function (cellIndex){ return rowIndex+','+cellIndex; }} }} — Grundy
– Grundy, Commented Oct 8, 2014 at 13:38

Grundy · Accepted Answer · 2014-10-08 13:52:37Z

3

yet another way without adding internal function to window

var objeto = { 
    row : function (rowIndex){ 
        return { 
            cell : function (cellIndex){ 
                return rowIndex+','+cellIndex; 
            }
        }
    }
}

answered Oct 8, 2014 at 13:52

Grundy

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Comments

Martin Wedvich · Accepted Answer · 2014-10-08 13:40:23Z

1

If you'd like to keep a hierarchy where cells belong to rows, you could do this:

var objeto = {
    row: function ( rowIndex ) {
        return ( function ( rowIndex ) {
            this.cell = function ( cellIndex ) {
                return rowIndex + ',' + cellIndex;
            };
            return {
                cell: this.cell
            }
        }( rowIndex ) );
    }
}

answered Oct 8, 2014 at 13:40

Martin Wedvich

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4 Comments

Grundy Over a year ago

this.cell add cell function to window in your case :-)

Felix Kling Over a year ago

Please note that you are creating or assigning to the global variable cell whenever the function is called. You should avoid that.

levi Over a year ago

there is no need for the additional closure within the row method. the value of rowIndex is already preserved via the row method, which itself acts as a closure.

Martin Wedvich Over a year ago

You guys are right, I was a bit trigger happy there. Grundy's answer would be the preferred solution.

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