Improve functional example

Author: tshemsedinov

JavaScript/2-functional-good.js

@@ -21,15 +21,14 @@ const renderCell = (cell, i) => cellPad(i, cell + '', cellWidth(i));
 const renderRow = row => row.map(renderCell).join('');
 const renderTable = table => table.map(renderRow).join('\n');
 
-// const densityCol = () => 3;
-const densityCol = 3;
+const densityCol = () => 3;
 const sortByDensity = table => table.sort(
- (row1, row2) => (row2[densityCol] - row1[densityCol])
+ (row1, row2) => (row2[densityCol()] - row1[densityCol()])
 );
 const calcColumn = (table, max) => table.map(
- row => (row.push(proportion(max, row[densityCol])), row)
+ row => (row.push(proportion(max, row[densityCol()])), row)
 );
-const calcProportion = table => calcColumn(table, table[0][densityCol]);
+const calcProportion = table => calcColumn(table, table[0][densityCol()]);
 
 const parseTable = lines => lines.map(line => line.split(','));
 const toLines = data => data.split('\n').filter((s, i) => i && s);