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A Common-Sense Guide to Data Structures and Algorithms, Second Edition - exercises with `array.sort` (page 476)

GeoffreyBooth

GeoffreyBooth

Node.js & CoffeeScript Core Teams

A Common-Sense Guide to Data Structures and Algorithms, Second Edition - exercises with `array.sort` (page 476)

In the answers for the Chapter 13 exercises, there are several uses of JavaScript’s array.sort() to sort an array of numbers. However, this sorts numbers as strings, and so a number like 22 will appear before a number like 3:

[3, 1, 22].sort();
// [ 1, 22, 3 ], when what we want is [ 1, 3, 22 ]

The answers should replace uses of array.sort() with:

array.sort((a, b) => (a < b) ? -1 : 1);
1 comment
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jaywengrow

jaywengrow

Author of A Common-Sense Guide to Data Structures and Algorithms

Thanks for this! We were able to fix this in time for the first printing.

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