How to Write a Web Application in Ruby cuts through the magic and shows you exactly how every part of a web application does its job. An ebook and screencast walk you through the process of building a complete web application from scratch — in bare-bones Ruby, using code from the standar...
Instead ofreading the whole file into memoryyou’ll be able to process the file one line at a time, which is useful for big files. How to Write to a File in Ruby If you want to write to a file using Ruby: Open the file in write mode (“w” flag) Use thewritemethod to add da...
This tutorial will walk you through creating this program in Ruby. However, to make the program more interesting, you’ll modify the traditional “Hello, World” program so that it asks the user for their name. You’ll then use the name in the greeting. When you’re done with the tutori...
To run the code in a function, you must call the function. A function can be called from anywhere after the function is defined. Functions can return a value using a return statement. Functions are a common feature among all programming languages. They allow developers to write blocks of ...
This tutorial teaches how to write a multiline string in JavaScript. In the pre ES6 era, there was no direct support for multiline strings in JavaScript. There are several ways to achieve this, pre ES6 ways which were not so good, and the ES6 way, the syntactic sugar way. We will cov...
The nature of Node.js programming becomes clearer in the next few lines. I use the http object to create an HTTP server. The sole parameter is a function literal that takes a req (HTTP request) object and a res (HTTP response) object as parameters, and uses res to write the HTTP resp...
The read_to_end() copies data in big chunks. Thus, the transfer can naturally merge into fewer I/O operations.Output:150 Create a Function in RustThe create function is used for opening the file in write-only mode. If the file already exists, the previous content is overwritten, and ...
Sometimes you’ll want to write code that spans multiple lines. IRB supports this intuitively. IRB only executes code that is syntactically complete. The following Ruby code uses anarrayof sharks and uses theselectmethod to return only the sharks containing the letter “a” in their name. Type...
Ruby: The Well-Grounded Rubyist SQL: SQL in 10 minutes, Sams Teach Yourself Swift: Swift Programming: The Big Nerd Ranch Guide 6. Use tools that make learning to code easier. While it’s great to know that you don’t need any special tools to write code, there are tools that can hel...
Another advantage of RapidAPI is that you can access endpoints and test the work of the API directly in its section within the RapidAPI service. You don’t need to immediately write a program or launch aPostmanapplication to get an idea of the capabilities of the API. ...