June 2022
Intermediate to advanced
130 pages
2h 45m
English
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Chapter 5Key-Value Data
The previous two chapters were about linear data. This chapter will focus on key-value data. Let’s set the stage, right from the beginning.
Key-value data is everywhere in functional programming because key-value data is everywhere in the world. All of these examples represent key-value pairs:
- We look up definitions in a dictionary by a word.
- Programs refer to people informally by name, or formally by a social security number or email address.
- Function or program options have names and values.
- Database rows have columns.
- Data structures often have fields.
These examples all associate a key with a value. To put it another way, these associations are mappings. In fact, way down at its foundation, functional programming is also ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.