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Painless introduction to algorithms for self-taught developers.

Beoordeeld in het Verenigd Koninkrijk op 17 maart 2018

Geverifieerde aankoop

Despite having been a software developer for more years than is socially acceptable, I lack a background in computer science - granted, I have a doctorate in computational physics and can write code for money but I've never had any formal training in the 'fundamentals' of computer science.

Let's get something straight: algorithms can be hard, and when you get down to the nitty gritty the source material is drier than a particularly dry thing at midday in the Sahara so anything that attempts to make the concepts more palatable to the self-taught is to be applauded irrespective of whether or not it succeeds. The thought of an illustrated book will, no doubt, make the purists recoil in horror - that's their loss. Sometimes a couple of drawings are far more illuminating than pages full of discrete mathematics, and this is what we have here.

This won't be to everyone's tastes - some programming knowledge is assumed, but the fundamentals are discussed in a fluff-free manner with short snippets of code (in Python) to reinforce the points made. The usual suspects are here: starting with binary search, moving up through various sorting and tree/graph algorithms with a brief detour into NP-complete problems such as the travelling salesman and knapsack problem. There's an excellent overview of big-O notation and one of the better explanations of recursion that I've come across - I almost feel that I understand it now.

If your background is in 'hard' computer science then there's probably very little here for you - having said that, if you're self-taught or have moved into software development from another discipline then you'll probably learn something. Certainly, I found even the basic stuff to be very illuminating and have started applying some of the concepts to my own code with tangible results.

TL;DR - if you've already got a grounding in computer science then look elsewhere- there are plenty of other books on algorithms and algorithmic design that will go into excruciating amounts of detail. If you're not one of these people and want to get up to speed then this may be right up your street - the content is engaging enough that it'll encourage you to read more deeply into the subject.

46 mensen vonden dit nuttig

Vertaal recensie in het Nederlands

JW Kim

Not really well written

Beoordeeld in het Verenigd Koninkrijk op 20 juni 2021

Geverifieerde aankoop

Is grokking for beginners?

grokking algorithms looks like it's written for a grade schooler. Cute cartoon animals habitats the illustrations, which look hand drawn, like a friendly comic artist is just guiding you through a difficult subject.

Unfortunately the context is ill-digested.
The difficulty of the subject is not well translated for the beginner. In fact, a more formal looking textbook would provide more clearer explanations.

In short, this is just another algorithm intro book with friendly rat cartoons.

Do not recommend

5 mensen vonden dit nuttig

Vertaal recensie in het Nederlands

Nick O

An Honest Readers Review

Beoordeeld in het Verenigd Koninkrijk op 13 mei 2022

Geverifieerde aankoop

Absolutely terrible, please read on.

It's hard to know where to begin with this review, I'll try my best to keep it as brief as possible.

TLDR - Badly put together, concepts explained in a horrible meaningless way. "A book for visual learners" is quite honestly a lie. Some algorithms are just simply not explained at all, with no depth and bad 'visual' illustrations. If you want the most basic, sometimes not even that, explanations of a few algorithms in a physical format then waste your money on this. For those that want a better more completely FREE explanation, then might I suggest you look at the chapter headings from this book and google them. Taking the first page that is offered, unless it is from the blog of this author lol. Trust me you will get far more for your 'troubles'.

1 - The 3rd sentence in the 'about this book' section = "Any time a new concept is introduced, I explain it right away or tell you when I'll explain it". - Every new concept is followed by ....."I'll talk more about that in later chapters". Every single one, in the first 40 pages it is easily said 10+ times. Quick spoiler alert, most of the time it is rarely explained very well in whatever chapter you find it.

I can't begin to tell how aggravating I found this to be. It was honestly like 'part' learning something, it very quickly became a rather annoying thing to read.

2 - The way in which things are explained is just terrible, I mean shockingly terrible. In one of the early chapters to explain why an algorithm is correct and works, the author bizarrely uses flawed logic to make his point. It is hard to convey this here without typing out everything but believe me when I say it was something along the lines of "This is why 1 + 1 = 2. If we change one of the 1's to a 3 then it would equal 4. Ha-ha, I told you 1 + 1 = 2".

I found the whole explanation just odd. Very strange considering it is a book about algorithms and by its very nature relies on logic. For the author to use such an illogical argument to prove a point was just awkward to read.

I honestly don't think this book was read in depth by anyone before it went to print, as someone would have picked up on things like this. I don't feel the author has any authority on teaching the subject matter tbh. The way in which he decides to explain algorithms is sometimes confusing, almost as if he has gone out of his way to make it different to anyone else's way before him. Only to end on a bad example and be happy that it is good enough because it is original.

3 - "This book is for visual learners" - Never was a term more misused I'm afraid. I kid you not when I tell you that most of the 'visual' sections are simply tables / graphs seemingly hand drawn on the page with a handwriting font used, instead of a basic text font. I was honestly left laughing after 40-50 pages having realised this is what the author meant by visually explaining concepts for visual learners lol

If someone who knows more about visual learning than I, could explain how changing fonts in a book from standard book text to one that looks like it was handwritten makes the learning experience better then I'd love to hear (see) it. I'm afraid there was nothing visually helpful in this book for me. A standard table with a standard font would have been just as good and better, as the use of a handwritten font meant it was sometimes harder to read. At times this was not helped at all as the illustrator sometimes decided to write the characters on their side.

4 - Amazon states this book is 300 pages long - Eh no, not even close Amazon. A flat out lie. Firstly, the index (always at the back of a book) starts on page 235 (it's not a huge index, in case you were thinking). Secondly on any given page, the lines are no more than 15 words long. There is a gap of 1 inch to the left of text on every page. Then there is a gap of roughly 2.5 inches to the right of the text on every page.

I'm sure you're now thinking, oh but this must be where all the wonderfully helpful illustrations are. Don't kid yourself lol. For the most part these gaps are never used. It's a weird tactic I'm guessing to try and pad the book out? Make it seem like there is more than there really is? Yeah, it doesn't work.

In fact, I would be scared to work out how many pages of writing this book is, I'm going to guess a very conservative 80 pages. That is of course with all the meaningless illustrations taken away also.

5 - I can't for the life of me see any reason as to why I would recommend this book to anyone if I'm being honest. I've come away having finished it laughing about it more than thinking "Ah fantastic, now I understand x, y & z.

How this is number 1 in Algorithmic Programming on Amazon is beyond me. How some are rating it more than 2 stars is also confusing me. With some reviewers stating how they got more from the 1st 10 pages of this book than a year in uni ?????? LMAO.

I highly recommend you look at 'A Common-Sense Guide to Data Structures and Algorithms' over this book. Amazon states that book is 250 pages and yet the index starts on page 475 LMAO - You couldn't make that crap up lol. With that you will get an in-depth explanation of data structures and algorithms and will come away from it knowing you have learnt something. With the author not trying to reinvent the wheel with weird and different ways to explain his ideas.

In case you're still unsure on my thoughts - I highly recommend you DO NOT buy this book.

Een iemand vond dit nuttig

Vertaal recensie in het Nederlands

Henrik Warne

Great introduction to algorithms for anybody new to programming

Beoordeeld in het Verenigd Koninkrijk op 2 januari 2020

Geverifieerde aankoop

Grokking Algorithms is a great introduction to algorithms for anybody new to programming. What makes the book stand out is its use of pictures to help explain how the algorithms work.
Several concepts that aren’t algorithms per se are also explained, for example arrays, linked lists, hash maps and call stacks. The book covers a broad range of algorithms, from basic ones, like binary search and sorting, to more advanced like graph algorithms and dynamic programming.
The implementations are given in Python. However, the emphasis is not on the code, but on explaining how the algorithms work. The true test to see if you have understood the content is to write your own implementations of the algorithms. Reading this book is a good first step to that understanding.

3 mensen vonden dit nuttig

Vertaal recensie in het Nederlands

Yay!!

Stunning book for Visual Learners.

Beoordeeld in het Verenigd Koninkrijk op 28 november 2019

Geverifieerde aankoop

After years of University Computer Science, its amazing how little you know about programming.

This book is specifically geared towards the visual learner. We want to "see" where we're going, and this book gives you more in the first chapter than an entire year of University education.

If you're a visual learner, this book is unique and a must have.
There is nothing else on the market that has this approach. You can "see" the point, the logic and how it works, and that's it. You've learnt a "hard concept" and are grinning from ear to ear, as it's taken you 10 minutes.

Een iemand vond dit nuttig

Vertaal recensie in het Nederlands

R. Saxby

Great resource for kinesthetic learners and those new to computer science

Beoordeeld in het Verenigd Koninkrijk op 29 maart 2018

Geverifieerde aankoop

This is the first resource on Algorithms that has worked for me. Aditya writes in a clear, concise, and accessible way. He provides very relevant, real-world examples of the existence and application of algorithms, as well as code examples (in Python), both of which are crucial for kinesthetic learners such as myself. 100% recommend.
Another bonus is that the publisher provides the means to download the ebook versions (kindle, pdf, etc.) free of charge with the purchase of the paper book.

4 mensen vonden dit nuttig

Vertaal recensie in het Nederlands

Azik

Loved it

Beoordeeld in het Verenigd Koninkrijk op 17 januari 2019

Geverifieerde aankoop

14 years old boy heavily into coding really loved this book.

7 mensen vonden dit nuttig

Vertaal recensie in het Nederlands

Kelly

Great book, highly recommend

Beoordeeld in het Verenigd Koninkrijk op 22 februari 2021

Geverifieerde aankoop

Got this book to support in study. It is excellent at introducing algorithms in an easy to understand way, and the publishers provide an online version as well.

One small point, the early chapters use python2 to demonstrate some of the topics, most current python developers will be using 3+ so if you want to run in a python3 environment you will need to change the syntax in parts.

Vertaal recensie in het Nederlands

Very basic

Beoordeeld in het Verenigd Koninkrijk op 16 april 2022

Geverifieerde aankoop

This book is very basic. It might be useful for self taught developers but still only at the early stage. If you have some programming experience and want a book that has more content and code examples I’d strongly recommend A Common-Sense Guide to Data Structures and Algorithms by Jay Wengrow.

Vertaal recensie in het Nederlands

Tired Hawk

Excellent overview of useful and practical algorithms and data structures

Beoordeeld in het Verenigd Koninkrijk op 26 februari 2022

Geverifieerde aankoop

A great primer on algorithms and data structures. You will gain an understanding of important concepts from the very beginning of the book which you can then apply in your work as a software engineer. The author has clear writing style and balances high- and low-level detail well so that you don't get lost in the information but still feel like you've delved to a reasonable depth in the subject. I highly recommend this book as an introduction to algorithms and data structures!

Vertaal recensie in het Nederlands

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Grokking Algorithms: An Illustrated Guide for Programmers and Other Curious People

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