PurelyFunctional.tv

Index Usage Pattern

Want this course?

Buy for $75
Membership
 Video time: 18m07s
PREVIOUS
NEXT

Want this course?

Buy for $75
Membership

Index Usage Pattern

Course: Clojure Collections

Updated October 24, 2018

Code

We look at another usage pattern for HashMaps. This one is for looking things up based on a key. We look at three variations on it.

Buy this course to view the code.

Next Lesson

21 min

Tuple Usage Pattern

We look at another typical usage pattern. This one uses Vectors to hold bits of data together. It's a replacement for Entities (which use a HashMap), but it has a lot of limitations, which we go over. WE talk about the Variant Tuple variation.

Course: Clojure Collections

0 / 34
0 / 34
 
Lessons
 
Introduction to Clojure's Collections
 
5 min 
 
Data structures
 
8 min 
 
Vector collection
 
24 min 
 
HashMap collection
 
30 min 
 
Set collection
 
19 min 
 
List collection
 
12 min 
 
Queue collection
 
11 min 
 
Sorted Map collection
 
11 min 
 
Sorted Set collection
 
7 min 
 
Access patterns
 
8 min 
 
Sequential Access Pattern
 
26 min 
 
Remembering Duplicates Access Pattern
 
16 min 
 
Lookup by key Access Pattern
 
12 min 
 
Associate key and value Access Pattern
 
19 min 
 
Dissociate a key and value Access Pattern
 
4 min 
 
Count the elements Access Pattern
 
6 min 
 
Equality Comparison Access Pattern
 
12 min 
 
Removing an item from a set Access Pattern
 
8 min 
 
Splitting a sequence Access Pattern
 
8 min 
 
Containment Check Access Pattern
 
9 min 
 
First-in, first-out Access Pattern
 
12 min 
 
Last-in, First-out Access Pattern
 
6 min 
 
Usage patterns
 
2 min 
 
Entity Usage Pattern
 
17 min 
 
Index Usage Pattern
 
18 min 
 
Tuple Usage Pattern
 
21 min 
 
Multi-comparison Usage Pattern
 
11 min 
 
Transients
 
11 min 
 
Usage in an Atom
 
17 min 
 
Hybrid Collections
 
11 min 
 
Hybrid Types
 
27 min 
 
Vectors and Lists in syntax
 
6 min 
 
Lazy sequences
 
5 min 
 
Collections vs sequences
 
14 min