ubuntuask.com
-
7 min readTo compare strings in Haskell, you can use the following functions and operators:== operator: Use this operator to compare if two strings are equal. It returns True if the strings are the same, and False otherwise. For example: "hello" == "hello" -- returns True "hello" == "world" -- returns False /= operator: Use this operator to check if two strings are not equal. It returns True if the strings are different, and False if they are equal.
-
4 min readIn Haskell, calling a function involves providing the function name followed by the required arguments. The basic syntax to call a function is as follows: functionName argument1 argument2 ... Here, functionName is the name of the function you want to call, and argument1, argument2, etc. are the arguments or inputs required by the function. You can provide as many arguments as required by the function's definition.
-
4 min readTo concatenate strings in Haskell, you can use the ++ operator or the concat function. Here's how you can use each of these methods:Using the ++ operator: You can simply use the ++ operator to concatenate two or more strings. Here's an example: concatStrings :: String -> String -> String concatStrings str1 str2 = str1 ++ str2 Here, the ++ operator appends str2 to str1, resulting in the concatenated string.
-
4 min readIn Haskell, append is a function used to concatenate two lists. It takes two lists as input and combines them to produce a new list. The resulting list contains all the elements of the first list followed by all the elements of the second list.To implement append in Haskell, you can define it using pattern matching.
-
9 min readTo install Haskell in Arch Linux, you can follow these steps:Open terminal by pressing Ctrl+Alt+T or by searching for "Terminal" in the application launcher. Update the package lists and upgrade the system by running the command: sudo pacman -Syu Install the Glasgow Haskell Compiler (GHC) using the package manager (pacman): sudo pacman -S ghc Install the Haskell Cabal build system: sudo pacman -S cabal-install Add the following lines to your ~/.
-
4 min readIn Haskell, you can split a string into parts using various methods. Here are three common approaches:Using the words function: The words function in Haskell splits a string into a list of words. Each word in the string is separated by one or more whitespace characters. For example: words :: String -> [String] words "Hello World" -- Returns: ["Hello","World"] words splits the string at each whitespace character and returns a list of words as separate strings.
-
5 min readTo sort a list in Haskell, you can use the sort function from the Data.List module. Here's how you can do it:Import the Data.List module by adding the following line at the top of your Haskell file: import Data.List Use the sort function to sort a list in ascending order. For example, if you have a list myList, you can sort it using: sortedList = sort myList The sort function returns a new list with elements sorted in ascending order. The original list remains unchanged.
-
5 min readTo reverse a list in Haskell, you can use the built-in reverse function which takes a list as an input and returns a new list with the elements in reversed order. Here's an example: reverseList :: [a] -> [a] reverseList xs = reverse xs In this example, reverseList is a function that takes a list xs and applies the reverse function to it, returning the reversed list as the result.You can use this function to reverse any list of elements.
-
9 min readTo run Haskell in a terminal, you need to follow a few simple steps:Open the terminal on your computer. This could be the default terminal application or a specialized terminal emulator. Ensure that Haskell is installed on your system. If it is not installed, you can download and install it from the official Haskell website. Navigate to the directory where your Haskell file is located using the cd command.
-
4 min readTo install Haskell in Ubuntu, you can follow these steps:Open the terminal by pressing Ctrl+Alt+T.Update the package list by running the command: sudo apt update Install the Haskell compiler (GHC) and the Haskell build tool (Cabal): sudo apt install ghc cabal-install Verify the installation by checking the GHC version: ghc --version Update the Cabal package list: cabal update To make the changes take effect, run the command: source ~/.
-
3 min readTo install Haskell on Mac, you can follow the steps below:Go to the Haskell website (https://www.haskell.org/) and click on the "Download Haskell" button. On the download page, you will find different platforms listed. Click on the macOS platform. A download will start automatically. Once the download is complete, locate the downloaded file (usually in the downloads folder). Double-click on the downloaded file to start the installer. Follow the instructions provided by the installer.