brackets-negative

Detect data of currency type with a leading currency symbol as well at detect two types of negative number formatting

• Author: Tom Buckle

This plug-in will add automatic negative currency detection for currency columns to DataTables. Note that only $, c, £ and € symbols are detected with this code, This plugin has also been updated to automatically detect negative values either those using '-' as well as numbers using '()' to specify negatives. This plugin also includes automatic type detection

Plug-in code

(function(){
    // Change this list to the valid characters you want to be detected
    var validChars = "$£€c" + "0123456789" + ".-,()'";
    // Init the regex just once for speed - it is "closure locked"
    var
    str = jQuery.fn.dataTableExt.oApi._fnEscapeRegex( validChars ),re = new RegExp('[^'+str+']');
    $.fn.dataTableExt.aTypes.unshift(
        function ( data )
        {
            if ( typeof data !== 'string' || re.test(data) ) {
                return null;
            }
            return 'currency';
        }
    );
    $.fn.dataTable.ext.type.order['currency-pre'] = function ( data ) {
        //Check if its in the proper format
        if(data.match(/[\()]/g)){
            if( data.match(/[\-]/g) !== true){
                //It matched - strip out parentheses & any characters we dont want and append - at front
                data = '-' + data.replace(/[\$£€c\(\),]/g,'');
            }else{
                //Already has a '-' so just strip out non-numeric charactors exluding '-'
                data = data.replace(/[^\d\-\.]/g,'');
            }
        }else{
            data = data.replace(/[\$£€\,]/g,'');
        }
        return parseInt( data, 10 );
    };
}());

CDN

This plug-in is available on the DataTables CDN:

Note that if you are using multiple plug-ins, it is beneficial in terms of performance to combine the plug-ins into a single file and host it on your own server, rather than making multiple requests to the DataTables CDN.

Version control

If you have any ideas for how this plug-in can be improved, or spot anything that is in error, it is available on GitHub and pull requests are very welcome!

• This plug-in: brackets-negative.js
• Full DataTables plug-ins repository: DataTables/Plugins