haskell

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Why is the minimalist, example Haskell quicksort not a "true" quicksort?

Haskell\'s website introduces a very attractive 5-line quicksort function, as seen below. quicksort [] = [][详细]

2023-04-12 14:48 分类：问答
A ghci session without Prelude

This question arose on #haskell irc chat: How can I start ghci without importing prelude? The possible answer seemed obvious:[详细]

2023-04-12 14:04 分类：问答
Determining the extent of lazy evaluation

Given data BTree a = End Node a (BTree a) (BTree a) deriving(Show,Eq,Ord) data Msg = Msg { from :: S开发者_运维问答tring[详细]

2023-04-12 13:59 分类：问答
Comparing list length with arrows

Inspired by Comparing list length If I want to find the longest list in a list of lists, the simplest way is probably:[详细]

2023-04-12 13:03 分类：问答
How to 'go to definition' for user defined function in Leksah?

I can do this for system functions like const by selecting it, right clicking and choosing search(metadata). The same does not work for user defined functions.[详细]

2023-04-12 11:55 分类：问答
Pcap file decoding in Haskell

I am trying to decode a pcap file and its working fine except couple of things. import Network.Pcap import System.IO[详细]

2023-04-12 11:21 分类：问答
How to escape characters in Haskell's Text.Regex library?

Introduction I\'m using Haskell\'s Text.Regex library and I want to match some characters that normally have meaning in regular expressions. According to Text.Regex\'s documentation,[详细]

2023-04-12 10:32 分类：问答
Is there a way for easy construction of a list of repeated elements in Haskell without helper functions?

Given a tuple of type (Int, a) such as (n,c), I wish to construct a list [a] where the element c is repeated n times, i.e., (4, \'b\') becomes \"bbbb\". My current solution is the f开发者_Python百科ol[详细]

2023-04-12 10:31 分类：问答
Automatic lifting of infix operators to monadic infix operators

One of the nice things about Haskell is the ability to use infix notation.开发者_运维知识库 1 : 2 : 3 : []:: Num a => [a][详细]

2023-04-12 08:00 分类：问答
Performance of lazy evaluation in Haskell when the arguments appear several times

Let\'s say I have a function which can calculate power of four of a number defined by let power4 x = x*x*x*x[详细]

2023-04-12 07:14 分类：问答