This question already has answers here: 开发者_Python百科 Haskell - What is Control.Applicative.Alternative good for?
I have written the following code to remove vowels from a sentence: main = print $ unixname \"The House\"
I have a list [1, 2, 3, -100, 2, -100]. I need to replace -100 with \"ERROR\", and others to their corresponding string.
This question already has answers here: Closed 11 years ago. Possible Duplicate: Find common prefix of strings
I want to return an array that that maps some filtered elements - but I want to keep the non-filtered elements where they are.
Is there a way to declare a function before defining it in OCaml?I\'m using an OCaml interpreter. I have two functions:
I am pretty new to functional programming and therefore F# and I have serious trouble to come up with the right solution for this problem.
For a homework assignment, we\'ve been instructed to complete a task without introducing any \"side-effects\".I\'ve looked up \"side-effects\" on Wikipedia, and though I get that in theory it means \"
The simplest approach is just to throw an exception with error information at the first occurrence of an error. Perhaps another approach is to pass a mutable list argument through analysis functions.
I have a standard datatype representing formulae of predicate logic. A function representing a natural deduction elimination rule for disjunction might look like:
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