Example General Resource Tools

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Validating Brazilian Postcodes
How to write a regular expression to validate Brazilian Postcodes? For example, 23080-060 is a valid Brazilian Postcodes. Here is the regular expression to validate Brazilian Postcodes: \d{5}-\d{3} \d{5} - 2 digits - - A - \d{3} - 3 digits 2013-01-29, 3111👍, 0💬

Validating United Kingdom postcodes
How to write a regular expression to validate United Kingdom postcodes? For example, EC1A 1BB is a valid UK postcodes. Here is the regular expression to validate United Kingdom postcodes: [A-Z]{1,2}\d[A-Z\d]? \d[ABD-HJLNP-UW-Z]{2} [A-Z]{1,2} - 1 or 2 letters \d - A digit [A-Z\d]? - An optional lette... 2013-01-29, 2966👍, 0💬

Validating Canadian Postal Codes
How to write a regular expression to validate Canadian Postal Codes? For example, T2X 1V4 is a valid Canadian postal codes. Here is the regular expression to validate Canadian postal codes: [ABCEGHJKLMNPRSTVXY]\d[A-Z] ?\d[A-Z]\d [ABCEGHJKLMNPRSTVXY] - 18 FSA possible letters \d - A digit [A-Z] - Any... 2013-01-29, 2845👍, 0💬

Validating Complexity and Length of Passwords
How to write a regular expression to check the complexity and length of passwords with the following requirements: Password must be at least 6 characters long Password must include at least including 1 upper case letter Password must include at least including 1 lower case letter Password must inclu... 2013-01-29, 3150👍, 0💬

Detecting missing closing parenthesis in program code
How to detect missing closing parenthesis in program code using regular expression? For example, I have the following program code: n = - (LN(1-(B/m)*(r/q))/LN(1+(r/q)) ;Can anyone help? 2013-01-29, 4170👍, 0💬

Finding content between two quotes
How to find content between two quotes in a text string using regular expression? For example, I have the following string: print "\$45.00\n"; Here is the regular expression to capture the content between two quotes: "([^"]*)" 2013-01-29, 2920👍, 0💬

Finding blank lines in a text file
How to find blank lines in a text file using regular expression? You can use the following logic to find blank lines in a text file: 1. Read each line from the text file in a loop. 2. Validate each line with this regular expression: ^\s*$ 3. If matched, you know that this line is a blank line. 2013-01-29, 3008👍, 0💬

Web address URL validation
How to perform a validation on Web address URLs using a regular expression? For example, " http://regex.fyicenter.com/ " is a valid Web address URL. To perform a basic validation on Web address URLs, try this regular expression: ^https?:\/\/([A-Z0-9][-\w]*(\. [A-Z0-9][-\w]*)+):?(\d+)?\/? 2013-01-27, 3065👍, 0💬

US Social Security Number validation
How to perform a validation on US Social Security Numbers using a regular expression? For example, " 333-23-2329 " is a valid US Social Security Number. To perform a basic validation on US Social Security Numbers, try this regular expression: ^[\d]{3}-[\d]{2}-[\d]{4}$ 2013-01-27, 3030👍, 0💬

Email addresse basic validation
How to perform a basic validation on email address using a regular expression? For example, " test+email@fexample.com " is an invalid email address. To perform a basic validation on email addresses, try this regular expression: ^\D\w+(\.\w+)*[@]\w+(\.\w+)*\. [a-zA-Z]{2,4}$ 2013-01-27, 7313👍, 0💬

US phone number validation
How to perform a validation on US phone numbers using a regular expression? For example, " (021)423-2323 " is an valid US phone number. To perform a validation on US phone numbers, try this regular expression: ^\(?\d{3}\)?[-\s.]?\d{3}[-\s.] \d{4}$ 2013-01-27, 3318👍, 0💬

IP address validation
How to perform a validation on IP addresses using a regular expression? For example, " 198.168.1.78 " is an valid IP address. To perform a validation on IP addresses, try this regular expression: ^(([1-9]?\d|1\d{2}|2[0-4]\d|25 [0-5]).){3}([1-9]?\d|1\d{2}|2[ 0-4]\d|25[0-5])$ 2013-01-27, 2956👍, 0💬

US post code validation
How to perform a validation on US post codes using a regular expression? For example, " 12345-5434 " is an valid US post code. To perform a validation on US post codes, try this regular expression: ^([0-9]{5})(-[0-9]{4})?$ 2013-01-27, 3057👍, 0💬

MasterCard credit card number validation
All credit card numbers issued by MasterCard must start with 51 through 55 and have 16 digits. For example, 5271190242643112 is a valid MasterCard credit card number. How to write a single regular expression to validate a MasterCard credit card number described above? Here is the regular expression ... 2013-01-22, 9609👍, 0💬

American Express credit card number validation
All credit card numbers issued by American Express must start with 34 or 37 and have 15 digits. For example, 346997719493686 is a valid American Express credit card number. How to write a single regular expression to validate a American Express credit card number described above? Here is the regular... 2013-01-22, 10068👍, 0💬

Visa credit card number validation
All credit card numbers issued by Visa must start with a 4 and have 13 or 16 digits. For example, 346997719493686 is a valid Visa credit card number. How to write a single regular expression to validate a Visa credit card number described above? Here is the regular expression for Visa credit card nu... 2013-01-22, 4309👍, 0💬

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Example General Resource Tools