Skip to Content
Learn Red ? Fundamentals of Red
book

Learn Red ? Fundamentals of Red

by Ivo Balbaert
May 2018
Beginner content levelBeginner
252 pages
6h 19m
English
Packt Publishing
Content preview from Learn Red ? Fundamentals of Red

Using query string parameters

What if we want to know the rates for a date in the past, say, March 15? The website shows us that these rates can be obtained at http://www.floatrates.com/historical-exchange-rates.html?currency_date=2018-03-15&base_currency_code=USD&format_type=xml. This URL uses query string parameters to pass the date, currency code, and format type to the FloatRates web service.

We can make our script flexible by storing these parameters in variables and asking the user for the specific values he/she is interested in. We then build the complete URL by applying rejoin on a block, fitting in, and joining all parts of the URL together:

;-- see Chapter07/currency-rates2.red:url-base: http://www.floatrates.com/historical-exchange-rates.html? ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Start your free trial

You might also like

How I Built a Personal Board of Directors With GenAI

How I Built a Personal Board of Directors With GenAI

Vipin Gupta
How to Become a Game-Changing Leader

How to Become a Game-Changing Leader

Douglas A. Ready, Alan Mulally
Why AI Demands a New Breed of Leaders

Why AI Demands a New Breed of Leaders

Faisal Hoque, Thomas Davenport, Erik Nelson

Publisher Resources

ISBN: 9781789130706Supplemental Content