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7 min readTo install Erlang on Windows, follow these steps:Visit the official Erlang website at www.erlang.org.Go to the "Download" section of the website.Choose the Windows option under the "OTP" (Open Telecom Platform) category.Select the latest version of Erlang to download.Once the download is complete, locate the downloaded file (usually a .exe file).Double-click on the .exe file to start the installation process.Follow the on-screen instructions provided by the Erlang installer.
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5 min readParsing XML with Java involves reading XML data and extracting relevant information from it. Here is a brief explanation of how to parse XML using Java without list items:Java provides several APIs for XML parsing, such as DOM (Document Object Model), SAX (Simple API for XML), and StAX (Streaming API for XML). Here, we will focus on DOM parsing, which builds an in-memory representation of the XML.
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4 min readTo convert a datetime to day name and month name in Erlang, you can use the calendar module. Here's how you can achieve it:Retrieve the current datetime by calling calendar:now_to_local_time() or use {{Year, Month, Day}, {Hour, Minute, Second}} format for a specific datetime. Convert the date to a tuple format using calendar:date_to_erl/1. Extract the day name and month name from the date tuple using calendar:day/1 and calendar:month/1 functions, respectively.
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5 min readIn Erlang, there are several ways to match a substring while ignoring the case. Here are three common approaches:Using the re module: The re module in Erlang provides functions for regular expression matching. You can use the re:run/3 function to match a substring while ignoring the case. Here's an example: String = "Hello World", Substring = "hello", Options = [caseless], % Ignore case {match, _} = re:run(String, Substring, Options), io:format("Substring matched.
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10 min readTo read XML in Java, you can use the Java XML API, which provides several libraries and classes to parse and process XML files. Here is a step-by-step approach to reading XML in Java:Import the required classes and libraries: Import the javax.xml.parsers package for XML parsing. Import the org.w3c.dom package for XML DOM manipulation. Import the org.xml.sax package for parsing XML using SAX. Instantiate a Document Builder Factory: Use the DocumentBuilderFactory class to create a new instance.
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7 min readIn Erlang, you can read the body of an HTTP POST request using the built-in cowboy library, which is a small and fast HTTP server framework. Here's an example of how you can accomplish this:Start by including the cowboy and cowboy_rest libraries in your Erlang project. Define a module that uses cowboy_rest as its behavior: -module(my_rest_handler). -behaviour(cowboy_rest).
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10 min readParsing XML in Java involves several steps and can be done in different ways. Here is an overview of the process:Import the required classes: In your Java program, you need to import the necessary classes from the Java XML processing libraries. These usually include the javax.xml.parsers package. Create a DocumentBuilder: To parse XML, you need to create a DocumentBuilder object.
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7 min readIn the Erlang shell, you can spawn processes with arguments by using the built-in spawn/3 function. Here's how you can do it:Define the function that you want to spawn as a separate process. For example, let's say you want to spawn a process to calculate the factorial of a number: fact(N) -> fact(N, 1). fact(0, Acc) -> Acc; fact(N, Acc) -> fact(N-1, N*Acc).
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8 min readTo download an XML file from a URL, you can follow these steps:Identify the URL: Determine the specific URL from which you want to download the XML file. Ensure you have the correct URL. Set up the necessary environment: You might need to have a programming environment or a software application capable of downloading files from the web. Common examples include web browsers, command-line tools, or programming languages with built-in support for web requests.
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11 min readDebugging processes in Erlang involves tracing the execution of a specific process to identify and fix any errors or unexpected behavior. Here are some common techniques used for debugging processes in Erlang:Tracing: Erlang provides powerful tracing mechanisms that allow you to monitor the execution of a process. By utilizing the dbg module, you can set up trace patterns to selectively trace specific function calls or messages sent to a process.
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4 min readIn Erlang, an empty string can be printed by simply using double quotation marks without any content inside them. Here is an example of how to print an empty string in Erlang: io:format("~s~n", [""]). In the above code, the io:format/2 function is used to print a string. The format specifier ~s is used to indicate that we want to print a string, and ~n is used for a newline. The empty string is passed as an argument in a list [""] to the io:format/2 function.