January 2020
Intermediate to advanced
470 pages
11h 13m
English
Content preview from Mastering JavaScript Functional Programming - Second Edition
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Revisiting an example
We can start tying ends together by revisiting a problem from a previous chapter. Remember when we had to calculate the average latitude and longitude for some geographic data that we looked at in the Extracting data from objects section of Chapter 5, Programming Declaratively – A Better Style? Basically, we started with some data such as the following and the problem was to calculate the average latitude and longitude of the given points:
const markers = [ {name: "AR", lat: -34.6, lon: -58.4}, {name: "BO", lat: -16.5, lon: -68.1}, {name: "BR", lat: -15.8, lon: -47.9}, {name: "CL", lat: -33.4, lon: -70.7}, {name: "CO", lat: 4.6, lon: -74.0}, {name: "EC", lat: -0.3, lon: -78.6}, {name: "PE", lat: -12.0, lon: -77.0},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,
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