Validating form field for a specific combination of numbers and alphabets

Question

I need to validate a form field for a specific type of combination of numbers and alphabets:

• first four digits are alphabets
• next digit is zero
• next 6 digits are numeric

e.g.
IBKL 0 001084

Answer 1

Assuming your validation is client-side:

first four digits are alphabets next digit is zero and next 6 digits are numeric

Compact test:

/[a-zA-Z]{4}\s?0\s?[0-9]{6}\s?$/.test("IBKL 0 001084 ");
/[a-zA-Z]{4}\s?0\s?[0-9]{6}\s?$/.test("IBKL 0 001084");
/[a-zA-Z]{4}\s?0\s?[0-9]{6}\s?$/.test("IBKL0001084");

Verbose test:

var first_four = "[a-zA-Z]{4}",  zero = "0",  next_six = "[0-9]{6}", space_maybe = "\\s?", end = "$";

RegExp(first_four + space_maybe + zero + space_maybe + next_six + space_maybe + end).test("IBKL 0 001084 ");

RegExp(first_four + space_maybe + zero + space_maybe + next_six + space_maybe + end).test("IBKL 0 001084");

RegExp(first_four + space_maybe + zero + space_maybe + next_six + space_maybe + end).test("IBKL0001084");