Posts (page 72)
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4 min readTo properly plot a graph using matplotlib, you will first need to import the matplotlib library into your Python script. Next, create a figure and axis object using the plt.subplots() function. You can then use the axis object to plot your data by calling methods such as plot(), scatter(), or bar(). Customize your plot by adding titles, labels, legends, and changing colors and line styles. Finally, display your plot using the plt.show() function.
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4 min readTo remove multiple strings from a PostgreSQL string column, you can use the REPLACE function in combination with the || operator to concatenate strings. First, identify the strings you want to remove from the column. Then, use the REPLACE function to replace each of these strings with an empty string. You can do this in a single query by chaining multiple REPLACE functions together using the || operator.
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6 min readTo call a jQuery function from PowerShell, you can use the Invoke-WebRequest cmdlet to make an HTTP request to the page that contains the jQuery script. You can then use the Invoke-RestMethod cmdlet to execute the jQuery function and retrieve the result. Alternatively, you can save the jQuery script locally and use the Add-Type cmdlet to load the script and call the functions directly. Remember to include the necessary dependencies and make sure that jQuery is loaded before calling the function.
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5 min readTo increase the plottable space above a subplot in matplotlib, you can adjust the overall figure size or the relative height of the subplot. One approach is to create a new subplot that takes up the desired amount of space at the top of the figure, leaving the necessary space above the existing subplot. You can also adjust the spacing between subplots using the subplots_adjust() function.
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6 min readTo run a PowerShell script in Maven, you can use the Maven Exec Plugin. This plugin allows you to execute command-line programs, including PowerShell scripts, from within your Maven project.To use the Maven Exec Plugin, you need to add it to your project's pom.xml file and configure it to run your PowerShell script. You can specify the path to the PowerShell executable and the path to your script file in the plugin configuration.
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6 min readTo implement a cache table in PostgreSQL, you can create a new table in your database that will store frequently accessed or computationally expensive information. This cache table can be updated periodically or in real-time based on your application's needs. You can use triggers, views, or stored procedures to manage the cache table and keep it in sync with the primary data source.
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3 min readTo retrieve the raw figure data from Matplotlib, you can use the fig.canvas.get_renderer().buffer_rgba() method. This method will return a numpy array representing the raw RGBA values of the figure. You can then manipulate this data as needed for further analysis or processing. Keep in mind that this method may not be suitable for very large figures due to memory constraints.
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4 min readTo concatenate a string within a loop in PowerShell, you can use the "+=" operator to append the new string to the existing one. Here is an example: $string = "" for ($i=1; $i -le 5; $i++) { $string += "Iteration $i " } Write-Host $string In this example, the loop runs from 1 to 5 and in each iteration, the current value of $i is concatenated to the $string variable. Finally, the concatenated string is displayed using the Write-Host cmdlet.
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![How to Get Characters Between [ ] In Postgresql? preview](https://cdn.blogweb.me/1/66f0320047ebdb7c7ce172fb_d457f7378d.png)
3 min readIn PostgreSQL, you can extract characters between square brackets by using the substring function along with regexp_matches.Here's an example query that demonstrates how to achieve this: SELECT substring(regexp_matches('This is [an example] text with [characters] in brackets', '\[(.*?)\]', 'g')[1] FROM dual; In this query, the regexp_matches function is used to extract all substrings that match the pattern \[(.*?)\] (anything between square brackets).
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4 min readIn matplotlib, when you want to use a minus sign for the exponent instead of a hyphen, you can modify the rcParams parameter. You can achieve this by adding the following line of code before creating your plot: import matplotlib as mpl mpl.rcParams['axes.unicode_minus'] = False This code snippet changes the default behavior of matplotlib to use a minus sign instead of a hyphen for exponents.
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2 min readTo remove extra spaces from PowerShell output, you can use the -replace operator along with a regular expression to replace multiple spaces with a single space. For example, you can use the following command: Get-Process | Select-Object -Property Name,Id | ForEach-Object { $_ -replace '\s+', ' ' } This command will display the process name and ID with only single spaces between them, removing any extra spaces.
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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.