Say that you use ROS-kinetic and you want to start have fun with ros-control. Do you you know which are the dependencies? ok, follow me – it’s easy: sudo apt-get install ros-kinetic-ros-control sudo apt-get install ros-kinetic-ros-controllers sudo apt-get install ros-kinetic-gazebo-ros-control
Author: angelos
Install SmartGit in ubuntu (without apt-get)
Apt-get is great package manager in Ubuntu, a convenient tool to use for installing and removing apps. However, sometimes you need to install something by downloading the package from the source, maybe because has the brand new version and… you need it. Let’s say that we want to install SmartGit, a very handy git app
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Source control in Xcode… and terminal
Source control in the development procedure is not a luxury, it is essential. Don’t think of it necessary only when you work in a team. Pick up good habits early and apply it even if you work alone. It will enhance your work quality and sometimes it will become your saviour. This article will only
UIViewController lifecycle
Developing code for iOS means that you are going to use at least one UIViewController in your app. This is one of the elements of the Model-View-Controller (MVC) design pattern and it is really helpful to understand its lifecycle. There are certain methods that called automatically when the view controller is loaded, presented and hidden.
Enumerations 101 in swift
Don’t underestimate the enumerations in Swift. If you come from C or objective C there is a nice surprise for you. Enumeration are not based on integers, can have methods, initialisers, computed properties and conform to protocols. Additionally, we are going to learn about associated values as well, a powerful feature that is engaged in
Structures 101 in swift
Structures is not another type in swift. If you have background in C or objective C you will be impressed with the functionality of structs in swift. Structures have initialisers, methods, comfort to protocols have extensions…convinced? Well, if start thinking that are like classes you are right but…only similar. Major difference is that structures are
Iterating through Collection Types in Swift
Collection types in swift are the arrays, the dictionaries and the sets. Iterating through them is really easy using the for-in loop. The purpose of this article is to gather all the related information in one point, neat? Lets start with the arrays. We have an array of Strings and we want to print the
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Closures 101 in swift
Closures, what a great tool! Once you get it, you love it. Closures are the famous blocks in Objective-C. Maybe were a bit difficult to understand at first sight. I’ve written three parts in this blog to explain them. However now everything is easier. Closures are vital part in Swift and we will experiment with
Functions 101 in swift
Functions are the building blocks of any application. Let’s start with some obvious characteristics about them. The functions declared using the keyword func. Then follows the function name and the parenthesis containing the parameters, after that there is an arrow “->” and the return type is defined. So, it looks like: Inside the function, we
Declaration of variables in different locations in Objective-C
Having worked with Objective-C you will have noticed that there are many different locations to declare instance variables and local variables. In this article, we are going to explore the different possibilities and the meaning of each case. Lets start with the header file of the class. This file looks like this: In the first
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