Kerrick - 7 months ago 23

Ruby Question

I know that, in Ruby, you can use the

method to get the least common multiple of two numbers. For example:`10.lcm(15)`

# => 30

Is there an efficient (or built-in to the core or stdlib) way to get the least common multiple of all the integers in a given array? For example:

`[5, 3, 10, 2, 20].lcm`

# => 60

Answer

```
>> [5, 3, 10, 2, 20].reduce(:lcm)
=> 60
```

Any operation taking 2 operands can be applied iteratively to a collection folding it, Enumerable#reduce in Ruby.