What is Ruby on Rails?
Ruby on Rail follows the style of the MVC framework (template, view, controller). Models store information, view shows them, and the controller works in between to control them. Ruby on Rails also comes with gems s. Gems are libraries of Ruby programs that have been turned into a standard format for installation so that they are plug and play. There are thousands and many gems available, each serving a unique and often required need when building a web application.
Two different types of coffee ice cream sitting on a table. figure>
Ruby is typically used for client server side application .
Ruby is easier to write and learn.
Ruby is object oriented with classes, almost everything in Ruby is an object. td>
Ruby is written ’duck’ . td >
Now that we have some information on the two languages, let’s take a look at them and find out which one we could prefer to the other. We will approach this task by comparing them face to face on several fronts.
Typing and Syntax
Ruby is designed for usability. His philosophy is that there is more than one way to do something. So not only does Ruby have simple and easy to learn syntax, but it also has syntax designed to be used however you want. It’s top notch, no variable or semicolon declarations, just easy-to-read code. It is also more object oriented than most other object oriented languages. It is so object oriented that everything is object, with methods and functions, even simple integers. For this reason, programmers can use method chaining; where a lot of code can be reduced to a little bit of code.
However, since Ruby is so flexible in the way it allows the programmer to use it, it can be difficult to pass code between programmers. Code that would normally consist of multiple lines can be reduced to a few, then down to one line later. While these clean code looks better, it can also be difficult to read or harder to read than the same code spanning multiple lines. a single line of code that should be a lot can be difficult to crack. Because he’s relaxed, Ruby also allows for very inefficient programming methods and doesn’t force anyone to adhere to a set of programming rules, although they should.
Also, since Ruby is at such a high level, debugging can be a nightmare. Ruby is particularly abstract, so figuring out which line of code is manipulating the interpreter the wrong way can be difficult. squo, it’s not as easy as losing a semicolon, and it’s often linked to some invisible interaction happening under the hood, or also buried under a huge call stack
It is important to note that Ruby is slower in a baseline situation. That’s when we throw in something that’s hard to understand and then measure how long it takes the language to understand it. In the real world, when building a web application, you don’t always have to solve Mandelbrot fractals. In this sense, many Ruby fans argue that Ruby is quite fast, only slow compared to other languages, but works fine otherwise. This topic is the subject of intense debate, however, there are many functional examples of Ruby doing well: AirBnB, Kickstarter, or Apple.com to name a few. Performance usually only becomes an issue if perfect timing or large and complex calculations are required.
At the time of writing, Indeed.com offers more 16,000 ads from I work for Ruby developers and programmers only in the United States. Ruby developers are also making a lot of money. An average Ruby developer can generally expect to make anywhere from $ 50,000 to over $ 200,000 per year. According to Indeed, where all of these jobs are listed, the national average for a Ruby developer in the United States is $ 123,154 per year .
Removing white space around a saved image in matplotlib
I need to take an image and save it after some process. The figure looks fine when I display it, but after saving the figure, I got some white space around the saved image. I have tried the "tight" option for savefig method, did not work either. The code:
I cannot claim I know exactly why or how my “solution” works, but this is what I had to do when I wanted to plot the outline of a couple of aerofoil sections — without white margins — to a PDF file.
(Note that I used matplotlib inside an IPython notebook, with the -pylab flag.)
I have tried to deactivate different parts of this, but this always lead to a white margin somewhere. You may even have modify this to keep fat lines near the limits of the figure from being shaved by the lack of margins.