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4 min readTo access data inside a map in Elixir, you can use the dot notation or the square bracket notation.Using the dot notation, you can access the value of a key in a map by specifying the key directly after the map variable followed by a dot. For example, if you have a map variable called my_map and you want to access the value of the key :name, you can do so by typing my_map.name.Alternatively, you can also use the square bracket notation to access data inside a map.
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6 min readIn Kotlin, you can transform a Flow<T> to a StateFlow<List<T>> by collecting the items emitted by the Flow into a List and then updating a StateFlow with this List whenever a new item is emitted. This can be achieved using the stateIn operator provided by the Kotlin Flow library.First, create a StateFlow of type List<T> by using the stateIn operator with an initial empty list as the initial value.
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4 min readTo rewrite part of a URL in .htaccess, you can use the RewriteRule directive. This directive allows you to define rules to rewrite URLs based on certain patterns. For example, if you want to rewrite all URLs that contain the string "old" to have the string "new" instead, you can use the following code in your .htaccess file: RewriteEngine On RewriteRule ^(.*)old(.
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6 min readTo connect to a MongoDB replica cluster in Elixir, you can use the official Elixir MongoDB driver called "mongodb_ecto". First, add the driver to your mix.exs file as a dependency. Then, configure your MongoDB connection settings in your application configuration file. Use the MongoDB URI that includes the replica set name in the connection string. Finally, create a connection to the replica set using the MongoDB.Ecto connection module and pass in the connection details.
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3 min readIn Kotlin, "by" is used as a keyword to delegate a property or a method call to another object. This allows you to inherit behavior from the delegate object without explicitly defining all the methods or properties in the current class.On the other hand, "=" is used to assign a value to a variable or a property. It is used to store a value in a specific location in memory.In summary, "by" is used for delegation, while "=" is used for assignment.
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3 min readTo match every character except a slash in .htaccess, you can use the following regex pattern:([^/]+)This pattern will match one or more of any character that is not a slash. It can be used in .htaccess files for rewriting URLs or other server-side configurations. Just be sure to test your regex thoroughly to ensure it is behaving as expected before deploying it in a live environment.[rating:233766ea-dc8c-4894-8eb7-12a445728045]What is the significance of the dollar sign in regular expressions.
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4 min readTo properly force HTTPS and www in your website using .htaccess, you need to modify the .htaccess file located in the root directory of your website.To enforce HTTPS, you can use the following code snippet in your .htaccess file: RewriteEngine On RewriteCond %{HTTPS} off RewriteRule ^ https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301] This code snippet checks if HTTPS is not enabled on the website and redirects all traffic to the HTTPS version of the URL.
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4 min readIn Elixir, you can convert a Unicode codepoint to an integer by using the String.to_integer/1 function. This function takes a string representing the codepoint and returns the corresponding integer value. You can also use the String.to_charlist/1 function to convert a string to a list of Unicode codepoints, and then use the :unicode.characters_to_binary/1 function to convert the list of codepoints to a binary representation.
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4 min readIn Kotlin, coroutines are started using the launch function from the coroutineScope builder. This function takes a lambda expression as a parameter, which contains the code to be executed concurrently. Inside this lambda expression, you can perform asynchronous tasks without blocking the main thread. Additionally, you can use async to start a coroutine that returns a result, which can be later retrieved using await.
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5 min readTo block access by IP using .htaccess, you need to create rules in your .htaccess file that specify which IP addresses should be blocked from accessing your website. You can do this by using the "deny" directive followed by the IP address that you want to block. You can also use the "allow" directive to allow access only to certain IP addresses while blocking all others.
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4 min readTo print the callstack in Kotlin, you can use the Thread.currentThread().stackTrace property to access the current callstack as an array of StackTraceElement objects. You can then loop through and print each element to display the callstack information. Here is an example code snippet that demonstrates how to print the callstack in Kotlin: fun printCallStack() { val stackTrace = Thread.currentThread().stackTrace stackTrace.forEach { println(it.className + "." + it.