Gil Vegliach s blog
This is the third blog post explaining how to tackle dynamic programming. Part 1 deals with the recursive solution. Part 2 uses memoization to decrease the time complexity. This final part will use tabulation to make the code cleaner and even faster. Bottom-up dynamic programming, also known as tabulation, is the fastest-in-practice way to code [ ] The post Conquer Dynamic Programming in 3 easy…
This is the second blog post that explains how to tackle dynamic programming. Part 1 explains how to derive a recursive solution. Now it s time to optimize it. We will use memoization (top-down dynamic programming) to improve the time complexity of the solution. We will continue from part 1 using the problem word-break as example. [ ] The post Conquer Dynamic Programming in 3 easy steps – Part 2…
In today s blog post I will break down dynamic programming, a fundamental CS topic that throws off many programmers at first. Dynamic programming is feared as an advanced topic in software engineering interviews and CS classes. But it is quite simple if you know the steps to crack it. In this blog post, I will [ ] The post Conquer Dynamic Programming in 3 easy steps Part 1 appeared first on…
During my employment at Amazon, Facebook contacted me for interviewing for a software engineering position in London. Many months later I received an offer. In this blog post, I share my interviewing experience and give tips for the preparation for the software engineering interview. Structure of the interviews Facebook follows a rather standard interviewing process. [ ] The post Facebook…
Clean architecture is the latest book by Uncle Bob. It defines architectural patterns to make software easy to change. In this blog post, I will go through the book summarizing the main concepts and giving my opinion on it. Here is the table of contents: Introduction Code design principles (SOLID) Components principles Architecture principles Setting [ ] The post Clean Architecture by Uncle Bob:…
Handy script to change your MAC address. Useful for testing. Or bypassing time-limited WiFi s in coffee shops. Changing your MAC address is one command: sudo ifconfig "$INTERFACE" ether "$NEW_MAC". But you need to remember the MAC address format, come up with a new address, and remember the old address if you want to restore it (without [ ] The post Bash script: Change your MAC address appeared…
Interviewing tips for software engineers applying to Zalando. Before Amazon, I worked for Zalando for over 2 years. During that time I interviewed countless developers, from junior to tech leads, mostly in the Android space. In this post, I share what I was looking for and how to best prepare for the software engineer interviews. [ ] The post Zalando: How to pass the interview appeared first on…
Finally, I became AWS Certified Solutions Architect Associate on January 8 with an overall score of 87%. In this post, I will go through the exam experience and give final tips for preparation. This is the third post in my AWS certification series. The first post covered the motivations behind the AWS certification and why [ ] The post AWS Certified Solutions Architect: How I got certified…
Tips, tricks and study tips learned going half-way through the study guide to become an AWS Certified Solution Architect. This post gives a status update on my journey to become AWS certified. I started studying about a month ago and described my motivations in a previous blog post. For the preparation, I m using mainly the official [ ] The post AWS Certification: Half-way update appeared first on…
In this post, I want to explain my motivations to get the AWS Certified Solutions Architect certification and the value it provides. I also want to start a study log to help future students in the preparation. The AWS Certified Solutions Architect Associate is a certification by AWS targeted to candidates with distributed systems experience [ ] The post AWS Certified Solutions Architect: A study…
This post is the second in my mini-series about software engineering interviews. The first post was about Booking.com, the third one will be about Google, and this one is going to be about Amazon UK. I received an offer and ended up joining a backend team in Amazon Video. The Amazon interview looks similar to [ ] The post Amazon UK: How I passed the interview appeared first on CleverCoder.net .
Recently I accepted an offer as Software Development Engineer from Amazon UK. In the process, I also received an offer from Booking.com and interviewed with Google. In this brief series, I will tell about my experiences and the best way to prepare for software developer interviews. The first post is about Booking.com. The process While [ ] The post Booking.com: How I passed the interview appeared…
In this blog post, I will share my experience on the Toptal interview and how you can prepare to pass it. UPDATE: use this link and earn up to an additional $1500 when you get into Toptal. Some time ago, a co-worker of mine posted an article in HipChat about an ex-Googler making three times as much [ ] The post Toptal: How I passed the interview appeared first on CleverCoder.net .
Testing is an important part of the development process. Today we will leverage Android Studio shortcuts to create and run unit tests faster and without using the mouse. This is my usual workflow, see also the gif. You can change the shortcuts in `Preferences Keymap` (open with `Cmd+,`) navigating to the entries in parentheses. [ ] The post Pro Tip: Android Studio shortcuts for unit tests appeared…
Today we will make TextView render its text as transparent so that we can see underneath the TextView, for example the activity background. This technique uses the Porter s and Duff s transfer modes. A ready-to-use library along with its source code can be found here. How to use the library First, set up the dependency in [ ] The post A library that draws transparent text in a TextView appeared…
Today we are going to see how code can be downloaded and executed over the network. This technique is useful if you want to update parts of an app without rolling out a complete update. In the code sample, we will fetch two dex files, load them dynamically, and then execute their code. Along the [ ] The post Loading DEX code over the network appeared first on CleverCoder.net .
Retrofit is an open source library by Square that turns annotated java interfaces into REST clients. The library is currently in its second beta and changed quite a bit from its first version to better support the Ok stack. In this post we will go through its code, explaining its main techniques and inner workings. [ ] The post Retrofit 2: Code walkthrough appeared first on CleverCoder.net .
Many developers after reading the official documentation believe that the system will reap the hidden activities of a task when running out of memory. In this post we will see this is not the case and how to solve the problem. Let s take a took at the official docs: If an activity is paused or [ ] The post Hidden activities are not destroyed under memory pressure appeared first on CleverCoder.net…
Git Logo by Jason Long is licensed under the Creative Commons Attribution 3.0 Unported License. Sometimes we start working on a feature but mistakenly commit on the master branch. We realize the mistake too late and would like to move this commit or commits to a new feature branch. In this post I explain the [ ] The post Git: Committed on master instead of forking a branch appeared first on…
Today we are going to see how to recover a commit that was accidentally amended. Let s say we are in the following situation: $ git log --oneline eb92db3c Second commit 2fddb4b3 First commit We make some changes, stage them, and accidentally run git commit amend: $ git commit --amend [master c982fb5] Second commit (amended) Date: [ ] The post Git: Getting back an amended commit appeared first on…