cfunction
(array/insert arr at & xs)
Insert all of xs into array arr at index at. at should be an integer 0
and the length of the array. A negative value for at will index from
the end of the array, such that inserting at -1 appends to the array.
Returns the array.
(def a @[])
(array/insert a 1 :a) # error: index out of range
(array/insert a -2 :a) # error: index out of range
(def a @[1 6]) # => @[1 6]
(array/insert a 1 (splice [2 3])) # => @[1 2 3 6]
(array/insert a 3 ;[4 5]) # => @[1 2 3 4 5 6]
(def a @[11 12]) # => @[11 12]
(array/insert a 0 10) # => @[10 11 12]
(array/insert a 3 13) # => @[10 11 12 13]
(array/insert a -1 14) # => @[10 11 12 13 14]
(array/insert a -1 15 16 17) # => @[10 11 12 13 14 15 16 17]