Question

Ignore my novice knowledge in jQuery. I started to learn recently and I have a challenge in front of me. I have a checkbox with names checkbox_0, checkbox_1 and want to remove "checkbox_" from the strings so that I would use the 0, 1 in my loop to extract the data for that index. Thanks

aData value alerts me the value checkbox_0, checkbox_1 etc. those are the checkboxes selected.

submitButton.on("click", function() {
           $("Table :checked").each(function(e) {
                var iData =Table.fnGetData( this.parentNode);
                // Strip of the checkbox_ from the string
                for(var i=0; i<=iData.length; i++) {
                  aData = iData[i][7];
                }
                alert(aData);
                Table.fnDraw();             
                 
            });
        });

Answer 1

This is just a JavaScript, not a jQuery, thing.

To remove the first occurence of the work “checkbox_”:

var updatedString = originalString.replace("checkbox_", "");

Or if you know it’ll always be in the form "checkbox_n" where n is a digit,

var updatedString = originalString.substring(9);

…which chops the first nine characters off the string.

In either case, you end up with a string. If you want a number, you can use parseInt:

var updatedString = parseInt(originalString.replace("checkbox_", ""), 10);
// or
var updatedString = parseInt(originalString.substring(9), 10);

…or just put a + in front of it to cause an automatic cast (but note that in that case, both decimal and hex strings will be handled):

var updatedString = +originalString.replace("checkbox_", "");
// or
var updatedString = +originalString.substring(9);

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Note that I’ve written updatedString = originalString.blah(...); but of course you can replace your reference, e.g., “originalString = originalString.blah(…);`.

More to explore:

• MDN page on String