2017年2月9日 · For this reason, SML programmers sometimes write function which create lists in a backwards order (appending to the front rather than the back, even in situations where …

2011年12月18日 · List.nth is part of the Standard ML Basis Library; it maps from 'a list * int to 'a. In this case List.nth (myList, 0) is (1,9,3) . (Note that it uses zero-based indexing.) #2 is a built …

2012年9月8日 · Looks like you've just got your types wrong. A list has to be a list of something (e.g. an int list). If the type of the contents is irrelevant, you can use a type variable 'a instead …

2013年1月20日 · I have learned some of the List functions. "List.nth" is one of them. When I use this function in SML command window, It is working fine. But when used inside Let..in..end; …

2017年4月24日 · I need to write an SML function that takes in as input a list of tuples (x and y coordinates) and an integer value. The function needs to return true if the integer is an x value …

I'm very new to SML and I am trying a list exercise. The goal is sum up the previous numbers of a list and create a new list. For example, an input list [1, 4, 6, 9] would return [1, 5, 11, 20]. This …

2023年9月28日 · Here is the general idea - it is very straightforward to translate into SML: The sum of a list is. If the list is empty, it is zero; Otherwise, add the head of the list to the sum of …

2013年1月19日 · There is no sorting functionality defined in the SML Basis Library, but most implementations extend the basis library and add extra functionality. As such MosML has both …

2011年11月26日 · I suspect the problem is not with your list printing code - that's going to work fine, provided it is called with some data. For reference, there's a nicer way to evaluate for …

2010年11月23日 · I am trying to do basic list operations with SML. I want to extract each element of the list and append string to that element and add it back to the list.