Conventions used

There are a number of text conventions used throughout this book.

Code in text: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "In Truffle, it is a Java class derived from com.oracle.truffle.api.nodes.Node."

A block of code is set as follows:

@Fallback protected void typeError (Object left, Object right) {
    throw new TypeException("type error: args must be two         integers or floats or two", this);
}

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

✗ /Library/Java/JavaVirtualMachines/graalvm-ee-java11-21.0.0.2/Contents/Home/bin/npm --version
6.14.10

Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Select System info from the Administration panel."

Tips or important notes

Appear like this.