why the docs tell me i can add an array into function lcm, but why i need 2 argument for this function?

[IamsadVN]

I used the lcm and gcd functions to calculate values. During usage, I noticed that the types of these two functions seem different from what's shown in the documentation. Specifically, in the docs, the argument can be just a single array, and no other arguments are needed to perform the calculation. However, in my source code, MathJS seems to require types for these two functions that don't match what's in the docs. Instead of just passing a single array of numbers, I have to pass two arrays of numbers to calculate lcm or gcd. Am I doing something wrong, or is there actually an issue with MathJS's type definitions?

[gwhitney]

Can you reference any place in the documentation in which it is implied that it is valid to take the lcm of a single array? The first line of the documentation specifically says "... of two or more values or arrays" (emphasis mine). So if you supply multiple scalar entries, it will take the lcm of all of them. If you supply two (or more) matrices/arrays, they must have the same shape, and then the result will again be that shape, and each entry will be the lcm of the corresponding entries of the arguments to lcm.

If you wish to take the lcm of all of the elements in a single array A, presuming that it is just an ordinary array of numbers (or other scalar type mathjs can handle), I would recommend math.lcm(...A). If the entries you want are in a Matrix, and/or if they are two-dimensional, you will have to convert it to an Array (with the .toArray() method of Matrix) and/or flatten it (with the built-in JavaScript .flat() method of Array) before spreading it into lcm. Hope this helps.

[IamsadVN]

Well, I understand now. Thank you for patiently explaining it to me. Maybe I was too careless while reading the documentation, or perhaps I'm simply not very good at English, so sometimes my own translations make things harder for me to understand. Thanks to your explanation, I finally got it. I really appreciate the effort you put into explaining it to me!