How do i replace the second number from a string only?
Actual sting:
messages_0_items_0_data_0
Required Results:
messages_0_items_1_data_0
var new_index = 1;
this_input.attr('id', this_input.attr('id').replace(/[0-9]+(?!.*[0-9])/, new_index ));
the above code is changing the last number rather than the second number like follwoing:
Not Good:
messages_0_items_0_data_1
You could capture just before the second number in group 1, and then match the second number to be replaced.
^(\D*\d+\D+)\d+
See a regex demo.
const s = `messages_0_items_0_data_0
messages[0][items][0][data][0]`;
const regex = /^(\D*\d+\D+)\d+/gm;
console.log(s.replace(regex, (m, g1) => `${g1}1`));