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2 min readTo clear a text file without deleting it using Groovy, you can open the file in write mode and then truncate the contents of the file. This can be done by creating a new BufferedWriter object and passing it the file object in write mode. Then, you can use the truncate() method to clear the contents of the file. Remember to close the BufferedWriter object after writing to the file to ensure that changes are saved properly.
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5 min readTo download a jar file from a URL using Groovy, you can use the following code snippet: @GrabResolver(name='bintray', root='http://dl.bintray.com/content/shapeshift/maven') @Grab('com.shapeshift:zabox-core:0.1.5') import groovyx.net.http.HTTPBuilder def url = 'https://example.com/file.jar' def outputFile = new File('file.jar') new HTTPBuilder(url).get { resp, body -> outputFile.
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5 min readIn Groovy, you can join a list of maps using the collect method. The collect method allows you to transform each element in the list before joining them together. First, create a list of maps that you want to join. Then, use the collect method to extract a specific value from each map and join them together using the join method. This will give you a string representation of the combined values from all the maps in the list.
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4 min readTo create a property using Groovy script, you can simply declare a variable and assign a value to it. For example, you can create a property named "name" and assign it a value like this:def name = "John"This will create a property named "name" with the value of "John". You can then access and manipulate this property in your Groovy script as needed.
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4 min readTo run Maven commands using a Groovy script, you can use the ProcessBuilder class to execute external commands. You need to create a new ProcessBuilder instance and set the command to be executed (in this case, the Maven command).Here is an example of how you can run a Maven command using Groovy script: def command = "mvn clean install" def processBuilder = new ProcessBuilder(command.split(" ")) processBuilder.
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7 min readTo find an XML tag using Groovy, you can use the XmlSlurper class provided by Groovy. You can create an instance of XmlSlurper and then use methods like find, findAll, or depthFirst to search for specific XML tags based on their name or attributes. You can also use the GPath expressions to navigate through the XML structure and locate the desired tag. By using these methods, you can easily find and extract information from XML documents in Groovy.
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4 min readTo pass multiple string parameters to a function in Groovy, you can simply list the parameters separated by commas within the parentheses when defining the function.
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5 min readWhen cleaning up the output of a groovy script, you can start by using print statements to check the values and variables being outputted. This will help you identify any unnecessary or unwanted information in the output.You can also use formatting techniques such as using the println() function to display output on a new line or using string interpolation to concatenate variables with specific text or formatting.
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4 min readTo lock and unlock a Jenkins slave with Groovy, you can utilize the Jenkins API to interact with the slave node. First, you need to obtain the node object representing the slave using Jenkins.instance.getNode("node-name") method. Once you have the node object, you can use the setTemporarilyOffline(boolean) method to lock the node by setting the parameter to true. Similarly, you can unlock the node by setting the parameter to false.
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5 min readIn Groovy, you can get the day from a date by using the calender class. You can create a calender instance and set it to the date you want to extract the day from. Then, you can call the get method on the calender instance with the calender constant corresponding to the day of the week (e.g. calender.DAY_OF_WEEK) to get the day as an integer. Keep in mind that the week starts from Sunday with 1 as the value and ends in Saturday with 7.
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3 min readIn Groovy, nested expressions work in a similar way to other programming languages. When you have an expression within another expression, the inner expression is evaluated first before the outer expression. This allows you to create more complex and dynamic code by combining multiple expressions within one another.For example, you can nest if statements within while loops, or mathematical calculations within if statements.