To check if an array is empty in Julia, you can use the isempty
function. This function takes an array as its argument and returns true
if the array is empty, and false
otherwise. Here is an example:
Check if Array is Empty in Julia
julia> a = [] 0-element Array{Any,1} julia> isempty(a) true julia> b = [1, 2, 3] 3-element Array{Int64,1}: 1 2 3 julia> isempty(b) false
In the first example, we create an empty array a
using the square bracket syntax. We then use the isempty
function to check if the array is empty. Since the array does not contain any elements, the isempty
function returns true
.
In the second example, we create a non-empty array b
containing three elements. When we apply the isempty
function to this array, it returns false
because the array is not empty.
Overall, the isempty
function is a simple and effective way to check if an array is empty in Julia. It is a useful tool for working with arrays in your code.
Here is an advanced example that demonstrates some additional features of the isempty
function:
julia> a = [] 0-element Array{Any,1} julia> # Check if array is empty or contains only missing values julia> isempty(a) || all(ismissing, a) true julia> b = [1, 2, missing] 3-element Array{Union{Missing, Int64},1}: 1 2 missing julia> # Check if array is empty or contains only missing values julia> isempty(b) || all(ismissing, b) true julia> c = [1, 2, 3] 3-element Array{Int64,1}: 1 2 3 julia> # Check if array is empty or contains only missing values julia> isempty(c) || all(ismissing, c) false
In this example, we use the isempty
function in combination with the all
function and the ismissing
function to check if an array is empty or contains only missing values.
We first create an empty array a
and a non-empty array b
that contains missing values. When we apply the isempty
function to these arrays, it returns true
because they are either empty or contain only missing values.
Next, we create a non-empty array c
that does not contain any missing values. When we apply the isempty
function to this array, it returns false
because the array is not empty and does not contain only missing values.
This example shows how the isempty
function can be used in combination with other functions to check for more complex conditions in arrays. It can be a useful tool for working with arrays in Julia.
Related:
- How to Create Array in Julia?
- Check if an Element is in Array in Julia
- Check if all Elements in Array are Equal in Julia