Conventions

In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "Then, run the app using the node app.js command inside the Final directory."

A block of code is set as follows:

var solc = require("solc"); 
var input = "contract x { function g() {} }"; 
var output = solc.compile(input, 1); // 1 activates the optimizer  
for (var contractName in output.contracts) { 
    // logging code and ABI  
    console.log(contractName + ": " + output.contracts[contractName].bytecode); 
    console.log(contractName + "; " + JSON.parse(output.contracts[contractName].interface)); 
}

Any command-line input or output is written as follows:

    npm install -g solc

New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "Now select the same file again and click on the Get Info button."

Warnings or important notes appear in a box like this.

Tips and tricks appear like this.