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27 lip 2021 · TL;DR; Stop trying to access directly the n -th element of a t -uple and use a record or an array as they allow random access. You can grab the n -th element by unpacking the t -uple with value deconstruction, either by a let construct, a match construct or a function definition: let ivuple = (5, 2, 1, 1) let squared_sum_let = let (a,b,c,d) = ...
Tuples/records are like Cartesian product, because each value of a tuple or record contains a value from each of many underlying sets. Cartesian product is usually written with a product operator, \(\times\) or \(\Pi\).
Tuples. Here is a tuple containing two values, also known as a pair. # (3, 'K');;-: int * char = (3, 'K') That pair contains the integer 3 and the character 'K'; its type is int * char. The * symbol stands for product type. This generalises to tuples with 3 or more elements. For instance, (6.28, true, "hello") has type float * bool * string.
core v0.17.1 (latest): Industrial strength alternative to OCaml's standard library
To access specific elements of a tuple without binding them to variables, you can use indexing. Indexing in OCaml starts from 0, so the first element can be accessed with index 0, the second with index 1, and so on.
We learned how to create and access tuple elements, use tuples as function arguments, and return tuples from functions. Tuples are a versatile data structure that can greatly enhance the expressiveness and efficiency of your OCaml programs.
List elements can be accessed using indexing. In OCaml, lists are zero-indexed, meaning the first element has an index of 0. The syntax for accessing an element at a given index `i` in a list `lst` is `List.nth lst i`.
