Posts (page 73)
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7 min readTo properly setup GraphQL with Spring Boot and PostgreSQL, you first need to create a Spring Boot project with the necessary dependencies, including graphql-spring-boot-starter and graphql-java-tools. Next, you will need to configure your data source to connect to PostgreSQL and create entity classes to map to your database tables.You will then create GraphQL schema files to define your schema and resolvers to handle data fetching for your queries and mutations.
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2 min readTo add emojis to the text in the matplotlib legend, you can simply include the emoji characters directly in the string that you pass to the legend function. Make sure to use a font that supports emojis to render them correctly. You can also use Unicode escape sequences for emojis if you are using a font that does not support emojis. Just include the escape sequence for the desired emoji directly in the string passed to the legend function.
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6 min readTo extract a list of numbers using PowerShell regex, you can use the following pattern: "\d+". This regex pattern will match any sequence of one or more digits in the input text. You can apply this regex pattern using the Select-String cmdlet in PowerShell to extract all the numbers from a given text. For example: $inputText = "This is a sample text with numbers 12345 and 67890" $numbers = ($inputText | Select-String -Pattern "\d+" -AllMatches).Matches.
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3 min readYou can place tick labels above the grid line in matplotlib by adjusting the padding between the tick labels and the grid line. This can be done by setting the labelpad parameter in the tick_params function for the desired axis. By increasing the labelpad value, you can move the tick labels further away from the grid line, effectively placing them above it. This can help in making the plot more readable and visually appealing.
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4 min readTo execute a query returned by a function in PostgreSQL, you can use the EXECUTE statement. This statement allows you to dynamically execute a query that is stored in a variable or generated within a function.First, you need to define a variable to store the query returned by the function. Then, use the EXECUTE statement to execute the query stored in the variable. Make sure to use proper error handling to catch any potential issues during execution.
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3 min readTo zip individual files in PowerShell, you can use the Compress-Archive cmdlet.First, specify the path to the file that you want to compress. For example:$fileToZip = "C:\Path\To\File.txt"Then, specify the path where you want to save the zipped file:$zipFile = "C:\Path\To\ZippedFile.
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5 min readTo plot live data on a bar graph using Matplotlib, you can use the "plt.bar" function to create the initial bar graph with the necessary parameters such as x and y values, and then update the values dynamically to show live data. To update the data, you can use the "set_height" method on the bar object to change the height of individual bars on the graph. By continuously updating the data and then calling "plt.draw" and "plt.
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4 min readTo use a PowerShell global variable inside a cmd.exe statement, you can first assign the value of the global variable to a regular variable inside the PowerShell script. Then, you can use that regular variable in the cmd.exe statement.For example, suppose you have a global variable $globalVar in your PowerShell script. You can assign its value to a regular variable like $var using the following command: $var = $globalVar Then, you can use the $var variable in a cmd.exe statement like this: cmd.
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6 min readTo connect a PostgreSQL database from Flutter, you can use the sqflite plugin which provides a wrapper around SQLite for Flutter apps. Before you can connect to your PostgreSQL database, you need to set up a server or use a cloud-based service to host your database.Once your database is set up and running, you can use the sqflite plugin along with a package like postgresql which allows you to interact with PostgreSQL databases in Dart.
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2 min readTo plot data from a CSV file into a figure using matplotlib, you would first need to import the necessary libraries such as pandas and matplotlib. Then, you can read the data from the CSV file using pandas and store it in a DataFrame. Next, extract the x and y values from the DataFrame and use matplotlib to create a figure and plot the data. You can customize the plot by adding labels, titles, and legends using matplotlib functions.
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3 min readTo start a new PowerShell instance and run commands in it, you can simply open a PowerShell window by searching for it in the Start menu or by typing "powershell" in the Run dialog box (Windows key + R).Once the PowerShell window is open, you can start running commands by typing them directly into the console. If you want to open a new PowerShell instance within the current one, you can use the "Start-Process powershell" command.
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7 min readTo make a connection to PostgreSQL, you can use various programming languages and frameworks such as Python, Java, Node.js, or JDBC. First, you need to install the PostgreSQL database on your local machine or server. Then, you will need to create a database with a username and password to connect to it.Next, you will need to install the appropriate driver for your chosen programming language to communicate with the PostgreSQL database.