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4 min readIn Groovy, a class is defined using the keyword "class" followed by the name of the class. The class can have properties, methods, constructors, and other features just like in other object-oriented programming languages.To define an object of a class in Groovy, you simply create a new instance of the class using the "new" keyword followed by the name of the class and any parameters that need to be passed to the constructor.
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4 min readIn Groovy, you can iterate over a map using a for loop or the each method. You can use the keySet method to get the set of keys in the map and then iterate over each key using for loop. Alternatively, you can use the each method to iterate over each entry in the map, which gives you access to both the key and the value at each iteration. You can also use the findAll or find method to filter the entries in the map based on certain conditions.
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3 min readTo create a map in Groovy, you can simply use curly braces {} to define key-value pairs. Each key-value pair is separated by commas, with the key and value separated by a colon. For example:def myMap = [name: "John", age: 30, city: "New York"]This code snippet creates a map called 'myMap' with three key-value pairs: 'name' with value "John", 'age' with value 30, and 'city' with value "New York".
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4 min readIn Groovy, you can convert between different data types using various methods.One common way to convert between data types is using the to() method, which is available for many data types in Groovy. For example, you can use the toInteger() method to convert a String to an Integer, or the toBigDecimal() method to convert a String to a BigDecimal.You can also use type coercion to automatically convert between data types in certain situations.
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3 min readIn Groovy, strings can be concatenated using the + operator, just like in many other programming languages.
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4 min readIn Groovy, you can check if a string contains a substring by using the contains() method. This method returns a boolean value indicating whether the substring is present in the original string or not. You can use it like this: def originalString = "Hello, World!" def substring = "Hello" if(originalString.contains(substring)) { println "The original string contains the substring." } else { println "The original string does not contain the substring.
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3 min readTo sort a list in Groovy, you can use the sort() method on a list object. This method will sort the elements in the list in natural order. You can also use the sort method with a closure to define a custom sorting order. Another option is to use the sort method with a comparator to specify the criteria for sorting the elements in the list. Additionally, you can use the sort method to sort the list in descending order by passing in the reverse: true parameter.
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4 min readIn Groovy, working with dates and times is made easy thanks to built-in support for date and time manipulation. You can create Date objects by calling the new Date() constructor or by parsing a string representation of a date. Groovy also provides convenient methods for formatting dates using SimpleDateFormat.Additionally, Groovy has methods to perform date and time calculations such as adding or subtracting days, months, or years to a given date.
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5 min readIn Groovy, you can format strings by using the String.format() method. This method works similarly to the standard Java String.format() method.You can use format specifiers like %s for strings, %d for integers, %f for floating-point numbers, and so on.For example, you can format a string like this: def name = "John" def age = 30 def formattedString = String.format("My name is %s and I am %d years old.
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5 min readTo make an HTTP request in Groovy, you can use the built-in libraries such as HTTPBuilder or Apache HttpClient.With HTTPBuilder, you can easily create a request object, set headers, parameters, and execute the request to receive the response. Here is an example code snippet using HTTPBuilder: @Grapes([ @Grab(group='org.codehaus.groovy.modules.http-builder', module='http-builder', version='0.7.1') ]) import groovyx.net.http.
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6 min readWorking with JSON in Groovy is quite straightforward due to its built-in support for JSON parsing and serialization. To parse JSON data in Groovy, you can use the JsonSlurper class, which allows you to read JSON data as a map or a list of nested maps and lists. You can use the parseText() method of JsonSlurper to parse a JSON string into a Groovy data structure.