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deleteat!(collection, index::Integer)

deleteat!(collection, index)

Remove the item at the given index and return the modified collection. Subsequent items are shifted to fill the resulting gap.

julia> deleteat!([6, 5, 4, 3, 2, 1], 2)
5-element Array{Int64,1}:
 6
 4
 3
 2
 1

Examples

julia> foo = [6, 5, 4, 3, 2, 1];

julia> deleteat!(foo, 5);

julia> foo
5-element Array{Int64,1}:
 6
 5
 4
 3
 1

julia> deleteat!(foo, 2:2:5);       # sorted and unique itr

julia> foo
3-element Array{Int64,1}:
 6
 4
 1

julia> deleteat!([6, 5, 4, 3, 2, 1], 2)
5-element Array{Int64,1}:
 6
 4
 3
 2
 1

1. Delete multiple elements using an index range:

   julia> arr = [10, 20, 30, 40, 50, 60];
   julia> deleteat!(arr, 1:2:5)
   3-element Array{Int64,1}:
   50
   40
   60

   This example removes the elements at indices 1, 3, and 5 from the array arr.

2. Delete elements using a tuple of indices:

   julia> arr = [1, 2, 3, 4, 5, 6];
   julia> deleteat!(arr, (2, 2))
   ERROR: ArgumentError: indices must be unique and sorted

   In this case, an error is thrown because the indices provided are not sorted and unique. Ensure that the itr argument contains sorted and unique indices.

Common mistake example:

julia> arr = [1, 2, 3, 4, 5];
julia> deleteat!(arr, (1, 3, 3))
ERROR: ArgumentError: indices must be unique and sorted

In this example, the indices (1, 3, 3) are not unique, causing an error. The itr argument should contain unique indices in sorted order.

See Also

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