February 2019
Intermediate to advanced
320 pages
8h 28m
English
Content preview from Functional Programming For Dummies
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Chapter 9
Advancing with Higher-Order Functions
IN THIS CHAPTER
Defining the kinds of data manipulation
Changing dataset size using slicing and dicing
Changing dataset content using mapping and filtering
Organizing your data
Previous chapters in this book spend a lot of time looking at how to perform basic application tasks and viewing data to see what it contains in various ways. Just viewing the data won’t do you much good, however. Data rarely comes in the form you need it and even if it does, you still want the option to mix it with other data to create yet newer views of the real world. Gaining the ability to shape data in certain ways, throw out what you don’t need, refine its appearance, change its type, and otherwise condition it to meet your needs is the essential goal of this chapter.
Shaping, in the form of slicing and dicing, is the most common kind of manipulation. Data analysis can take hours, days, or even weeks at times. Anything you can do to refine the data to match specific criteria is important in getting answers fast. Obtaining answers quickly is essential in ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.