|Regular expression tester
This online calculator allows user to experiment with regular expressions.
The Email Finder calculator allows users to search for and extract email addresses from a block of text using a regular expression.
|The Phone Number Extractor
The phone number extractor calculator is a useful tool that extracts phone numbers from a large block of text.
Hack the three-digit code
|Tips and tricks #1: How to set output value
This article describes process of calculator creation and how to set output value.
|Tips and tricks #2: How to make calculator translatable into different languages
This article describes the process of adding translation support to the calculator, so it can be translated into different languages.
|Tips and tricks #3: How to make calculator with custom errors
This article describes the process of adding custom errors to the calculator
|Tips and tricks #4: How to make calculator with table output
This article describes how to make calculator which outputs results in table format
|Tips and tricks #5: How to show/hide input and output controls in a calculator
This article describes how to control visibility of input and output controls in a calculator
|Tips and tricks #6: How to make calculator with virtual keyboard
This article describes how to create calculator with virtual keyboard using SVG image
|Tips and tricks #7: How to make calculator with SVG image map
This article describes how to create calculator with image map using SVG image
|Map of France regions
Simple image map of France regions to illustrate usage of SVG image maps
|Tips and tricks #8: How to reuse existing calculator
This article describes process of reusing another calculator's logic (algorithm) in your calculator.
|Date to timestamp converter
|Tips and tricks #9: Big numbers
How to use big number input and PCR library.