How to Parse A String Of Version Numbers In Groovy?

To parse a string of version numbers in Groovy, you can use the tokenize() method to split the string based on a delimiter such as a period. This will return an array of strings representing each individual version number. You can then iterate through this array and convert each string to an integer if necessary. Additionally, you can use regular expressions to match specific patterns in the string if the version numbers are formatted in a specific way. Overall, parsing a string of version numbers in Groovy involves manipulating the string using built-in methods and potentially using regular expressions for more complex parsing tasks.

How to convert a string to a list in Groovy?

In Groovy, you can convert a string to a list by using the toList() method which splits the string into individual characters. Here's an example:

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def str = "hello"
def list = str.toList()

println list

This will output:

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[h, e, l, l, o]

Alternatively, you can also convert a string to a list of words by splitting the string based on a delimiter using the tokenize() method. Here's an example:

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def str = "hello world"
def list = str.tokenize()

println list

This will output:

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[hello, world]

What is string decoding in Groovy and how to process it?

In Groovy, string decoding is the process of converting encoded strings into their original form. This is often required when handling data that has been encoded for transmission or storage.

To process string decoding in Groovy, you can use the decode method from Java's URLDecoder class or decodeBase64 method from Apache Commons Codec library, depending on the type of encoding used.

Here is an example of decoding a URL-encoded string in Groovy using the URLDecoder class:

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import java.net.URLDecoder

def encodedString = "Hello%20World%21"
def decodedString = URLDecoder.decode(encodedString, "UTF-8")

println decodedString

And here is an example of decoding a Base64-encoded string in Groovy using Apache Commons Codec:

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@Grab(group='commons-codec', module='commons-codec', version='1.15')
import org.apache.commons.codec.binary.Base64

def encodedString = "SGVsbG8gV29ybGQh"
def decodedBytes = Base64.decodeBase64(encodedString)
def decodedString = new String(decodedBytes)

println decodedString

These examples demonstrate how to perform string decoding in Groovy for URL-encoded and Base64-encoded strings. Depending on the type of encoding used, you may need to adjust the code accordingly.

What is the difference between single and double quotes in Groovy strings?

In Groovy, both single quotes ('') and double quotes ("") can be used to create string literals. The main difference between the two is that double quotes allow for string interpolation, which means that variables and expressions can be included directly inside the string.

For example:

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def name = "Alice"
println "Hello $name" // This will output: Hello Alice

Single quotes, on the other hand, are treated as literal strings and do not allow for interpolation.

For example:

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def name = "Alice"
println 'Hello $name' // This will output: Hello $name

In general, if you need to include variables or expressions inside a string in Groovy, you should use double quotes. If you just want a simple literal string without any interpolation, you can use single quotes.