Groovy Book
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Groovy Book

About the Book

The books is a collection of articles that will help you learn Groovy and to use it to your advantage.

About the Author

Gábor Szabó
Gábor Szabó

Gabor Szabo has been programming for more than 30 years in a number of languages and in various environments. He used to do DevOps before there was a name for it.

These days he usually helps companies improve their engineering practices by providing training, introducing test automation, CI, CD. Sometimes this includes building internal web sites. Gabor also loves explaining things and provides training to his clients.

He also has a number of websites. Each one using a different technology.

Gabor runs the Code Maven site where he write about lots of different technologies such as Python, Golang, Jenkins, Continuous Integration, etc.

Gabor has been writing Perl since 1995 and teaching it since 2000. He is the author of the Perl Maven site including the Perl Tutorial. He has taught web development with Perl Dancer many time including at Perl Conferences in Europe and USA. Gabor is the chief editor of the Perl Weekly newsletter.

The Code And Talk and Pydigger sites use Python Flask.

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Table of Contents

  • About the book
  • Preface
  • Changes
    • v0.04 2019-04-21
    • v0.03 2019-04-07
    • v0.02 2018-09-14
    • v0.01 2018-09-13
  • Overview
    • Hello World in Groovy
    • Groovy: read from console (STDIN, keyboard)
    • Groovy value types
    • Groovy: Undeclared variable - runtime exception - groovy.lang.MissingPropertyException
    • Groovy: Number guessing game
    • Groovy: Determine type of an object
    • Groovy: Lists
    • Groovy: sum of numbers
    • Groovy: color selector
    • Groovy: read CSV file
    • Count digits in Groovy
    • Groovy: reading and writing files - appending content
    • Groovy: listing the content of a directory, traversing a directory tree
    • Groovy - Regular Expressions - regexes
    • Groovy map (dictionary, hash, associative array)
    • Groovy: JSON - reading and writing
    • Groovy: Date, Time, Timezone
    • Groovy: import and use functions from another file
    • Groovy: Random numbers, random selection from list of values
    • Groovy: Closures
    • Groovy: remove spaces from a string
    • Groovy: temporary file with autodelete
    • Groovy: relative path
    • Return multiple values from a function
    • Groovy string length
    • Groovy: substring
    • Groovy: for loop - break - continue
    • Groovy code reuse
    • Groovy functions
    • Groovy: evaluate code in another file
    • Groovy classes
    • Groovy function overloading
    • Groovy variable scope
    • Groovy recursive functions
    • Groovy command line arguments (args)
    • Groovy: join elements of an array
    • Groovy pop push
    • Groovy: Formatted printing with printf and sprintf
    • Groovy System properties
    • Groovy path to current executable script
  • Index

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