Merge pull request #27 from Deathsteps/number-zero-row-value

Get empty cells when row values are zeroes, expect number zero cells

Author: securedeveloper

lib/components/ExcelFile.js

@@ -41,7 +41,8 @@ class ExcelFile extends React.Component {
 
             React.Children.forEach(columns, column => {
                 const getValue = typeof (column.props.value) === 'function' ? column.props.value : row => row[column.props.value];
-                sheetRow.push(getValue(row) || '');
+                const itemValue = getValue(row);
+                sheetRow.push(isNaN(itemValue) ? (itemValue || '') : itemValue);
             });
 
             sheetData.push(sheetRow);