Convert a boolean string to a Bool, ignoring case

toBool "true"     --> Ok True
toBool "True"     --> Ok True
toBool "false"    --> Ok False
toBool "FALSE"    --> Ok False
toBool "blah"     --> Err "String argument must be 'true' or 'false' (case ignored)"

Same as Result.andThen, but flips the order of the arguments, allowing for cleaner syntax when used with the |> operator.

rawString
  |> toInt
  |> thenTry toValidMonth

Given a 2-tuple of Maybe values, if both values are defined, return Just the 2-tuple of values; otherwise, return Nothing

maybe2Tuple (Just 1, Just 2)    --> Just (1,2)
maybe2Tuple (Just 1, Nothing)    --> Nothing

Given a 3-tuple of Maybe values, if all three values are defined, return Just the 3-tuple of values; otherwise, return Nothing

Given a 4-tuple of Maybe values, if all four values are defined, return Just the 4-tuple of values; otherwise, return Nothing

Return a one-item list containing the argument

wrapList ("key", "value")


--> [ ("key", "value") ]

Get the value at the nth place of a list without converting the list to an array; returns Nothing if the list contains fewer than n + 1 items, or if n is negative

getNth 0 [1, 3, 9, 27]    --> Just 1
getNth 3 [1, 3, 9, 27]    --> Just 27
getNth 4 [1, 3, 9, 27]    --> Nothing
getNth -1 [1, 3, 9, 27]   --> Nothing

Returns the first two items in a list as a 2-tuple, or Nothing if the list contains fewer than two items

take2Tuple [1,2]   --> Just (1,2)
take2Tuple [1,2,3]    --> Just (1,2)
take2Tuple [1]    --> Nothing

Returns the first three items in a list as a 3-tuple, or Nothing if the list contains fewer than three items

Returns the first four items in a list as a 4-tuple, or Nothing if the list contains fewer than four items

Convert a 3-tuple of lists to a list of 3-tuples (see List.unzip)

Convert a 4-tuple of lists to a list of 4-tuples

Convert a 2-tuple of lists to a list of 2-tuples

zip ([0,17,1337], [True,False,True])


--> [(0, True), (17, False), (1337, True)]

Convert a 3-tuple of lists to a list of 3-tuples

Convert a 4-tuple of lists to a list of 4-tuples

Return the first value of a 3-tuple

Return the second value of a 3-tuple

Return the third value of a 3-tuple

Return the first value of a 4-tuple

Return the second value of a 4-tuple

Return the third value of a 4-tuple

Return the fourth value of a 4-tuple

curry with 3 parameters

curry with 4 parameters

uncurry with 3 parameters

uncurry with 4 parameters

Given a tuple containing two functions and a value accepted by both functions, return a tuple containing the two results

Given a tuple containing three functions and a value accepted by all three functions, return a tuple containing the three results

Given a tuple containing four functions and a value accepted by all four functions, return a tuple containing the four results

Given a list containing any number of functions and a value accepted by every function in the list, return a list containing all of the results. Note that to use applyList, all of the results must be of the same type, which is not the case for the apply functions that return tuples.