December 2023
Intermediate to advanced
242 pages
5h 28m
English
Content preview from Text Processing with JavaScript
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| Recipe 56 | Validating Social Security Numbers |
Task
Suppose you have a loan application form (or maybe a background check form) and want to perform a check to ensure that the Social Security number (SSN) provided by users conforms to the standard format of an SSN.
The SSN is a nine-digit number that is divided into three parts separated by hyphens: AAA-GG-SSSS. The first set of three digits is called the area number, as it was once assigned based on geographical region. But it cannot be 000, 666, or between 900 and 999.
The group number, which consists of digits four and five, ranges from 01 to 99. The last four digits are known as serial numbers and are assigned from 0001 to 9999. You need a solution that adheres to all these rules and lets you ...
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