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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.
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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.