import { fn } from "https://deno.land/x/ddc_vim@v4.0.2/deps.ts";
const { flatten } = fn;
Flatten {list} up to {maxdepth} levels. Without {maxdepth}
the result is a List without nesting, as if {maxdepth} is
a very large number.
The {list} is changed in place, use flattennew() if you do
not want that.
In Vim9 script flatten() cannot be used, you must always use
flattennew().
{maxdepth} means how deep in nested lists changes are made. {list} is not modified when {maxdepth} is 0. {maxdepth} must be positive number.
If there is an error the number zero is returned.
Example:
:echo flatten([1, [2, [3, 4]], 5])
[1, 2, 3, 4, 5]
:echo flatten([1, [2, [3, 4]], 5], 1)
[1, 2, [3, 4], 5]
Can also be used as a method:
mylist->flatten()