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Learning Qlik Sense: The Official Guide
Learning Qlik Sense: The Official Guide

Learning Qlik Sense: The Official Guide: Get to grips with the vision of Qlik Sense for next generation business intelligence and data discovery

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Profile Icon Christopher Ilacqua Profile Icon James Richardson Profile Icon Henric Cronström
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€36.99
Full star icon Full star icon Full star icon Empty star icon Empty star icon 3 (14 Ratings)
Paperback Feb 2015 230 pages 1st Edition
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€36.99
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Arrow left icon
Profile Icon Christopher Ilacqua Profile Icon James Richardson Profile Icon Henric Cronström
Arrow right icon
€36.99
Full star icon Full star icon Full star icon Empty star icon Empty star icon 3 (14 Ratings)
Paperback Feb 2015 230 pages 1st Edition
eBook
€8.99 €29.99
Paperback
€36.99
Subscription
Free Trial
Renews at €18.99p/m
eBook
€8.99 €29.99
Paperback
€36.99
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Free Trial
Renews at €18.99p/m

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Learning Qlik Sense: The Official Guide

Chapter 2. Variables and Memory

To write your C++ game program, you will need your computer to remember a lot of things. Things such as where in the world is the player, how many hit points he has, how much ammunition he has left, where the items are in the world, what power-ups they provide, and the letters that make up the player's screen name.

The computer that you have actually has a sort of electronic sketchpad inside it called memory, or RAM. Physically, computer memory is made out of silicon and it looks something similar to what is shown in the following screenshot:

Variables and Memory

Does this RAM look like a parking garage? Because that's the metaphor we're going to use

RAM is short for Random Access Memory. It is called random access because you can access any part of it at any time. If you still have some CDs lying around, they are an example of non-random access. CDs are meant to be read and played back in order. I still remember jumping tracks on Michael Jackson's...

Variables

A saved location in computer memory that we can read or write to is called a variable.

A variable is a component whose value can vary. In a computer program, you can think of a variable as a container, into which you can store some data. In C++, these data containers (variables) have types. You have to use the right type of data container to save your data in your program.

If you want to save an integer, such as 1, 0, or 20, you will use an int type container. You can use float-type containers to carry around floating-point (decimal) values, such as 38.87, and you can use string variables to carry around strings of letters (think of it as a "string of pearls", where each letter is a pearl).

You can think of your reserved spot in RAM like reserving parking space in a parking garage: once we declare our variable and get a spot for it, no one else (not even other programs running on the same machine) will be given that piece of RAM by the operating system. The RAM beside...

Summary

In this chapter, we spoke about variables and memory. We talked about mathematical operations on variables and how simple they were in C++.

We also discussed how arbitrarily complex data types can be built using a combination of these simpler data types, such as floats, integers, and characters. Constructions such as this are called objects.

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Description

Learning Qlik® Sense is for anyone seeking to understand and utilize the revolutionary new approach to business intelligence offered by Qlik Sense. Familiarity with the basics of business intelligence will be helpful when picking up this book, but not essential.

Who is this book for?

Learning Qlik® Sense is for anyone seeking to understand and utilize the revolutionary new approach to business intelligence offered by Qlik Sense. Familiarity with the basics of business intelligence will be helpful when picking up this book, but not essential.
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Publication date : Feb 06, 2015
Length: 230 pages
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Language : English
ISBN-13 : 9781782173359
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Frequently bought together


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Learning Qlik Sense: The Official Guide
€36.99
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Table of Contents

13 Chapters
1. Coding with C++ Chevron down icon Chevron up icon
2. Variables and Memory Chevron down icon Chevron up icon
3. If, Else, and Switch Chevron down icon Chevron up icon
4. Looping Chevron down icon Chevron up icon
5. Functions and Macros Chevron down icon Chevron up icon
6. Objects, Classes, and Inheritance Chevron down icon Chevron up icon
7. Dynamic Memory Allocation Chevron down icon Chevron up icon
8. Actors and Pawns Chevron down icon Chevron up icon
9. Templates and Commonly Used Containers Chevron down icon Chevron up icon
10. Inventory System and Pickup Items Chevron down icon Chevron up icon
11. Monsters Chevron down icon Chevron up icon
12. Spell Book Chevron down icon Chevron up icon
Index Chevron down icon Chevron up icon

Customer reviews

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Full star icon Full star icon Full star icon Empty star icon Empty star icon 3
(14 Ratings)
5 star 21.4%
4 star 21.4%
3 star 14.3%
2 star 21.4%
1 star 21.4%
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George Narita Feb 23, 2016
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Great book
Amazon Verified review Amazon
Sourabh Feb 09, 2020
Full star icon Full star icon Full star icon Full star icon Full star icon 5
Good book
Amazon Verified review Amazon
P J Webb Apr 01, 2015
Full star icon Full star icon Full star icon Full star icon Full star icon 5
If you want to learn about Qlik Sense this book is excellent! It teaches you the concepts of Qlik Sense, how and why to create each of the many visualizations, how to quickly load data, as well as creating stories, publishing to streams, and administering your site. There are also a number of business cases discussed to show how to release the true power of Qlik Sense.
Amazon Verified review Amazon
Mike Fitzgerald Feb 22, 2015
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
This a concisely written text for those starting out with Qlik Sense. It covers the full range of topics that a new user would require, but goes into no depth with any of them. I suspect this is because the Developers guide is coming (and a cookbook no doubt!). When I saw who the authors were I was expecting something a little more in depth and enlightening. However, I am happy to have it sit on my shelf as the first guide to the most exciting BI solution available today. The four stars is more for my love of the product than this light, well written book.
Amazon Verified review Amazon
Adam Ant Sep 16, 2015
Full star icon Full star icon Full star icon Full star icon Empty star icon 4
Covers what you need - but this product is changing fast and so this is rapidly out of date
Amazon Verified review Amazon
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