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cycle

cycle(iter)

An iterator that cycles through iter forever.

Examples

1. Cycle through an array:

   julia> arr = [1, 2, 3];
   julia> cycled = cycle(arr);
   julia> collect(take(cycled, 7))
   7-element Array{Int64,1}:
   1
   2
   3
   1
   2
   3
   1

   This example creates an iterator cycled that cycles through the array arr forever. By using take, we collect the first 7 elements from the iterator.

2. Cycle through a range:

   julia> rng = 1:3;
   julia> cycled = cycle(rng);
   julia> collect(take(cycled, 6))
   6-element Array{Int64,1}:
   1
   2
   3
   1
   2
   3

   It demonstrates how to cycle through a range using cycle.

3. Use cycle with strings:

   julia> word = "Julia";
   julia> cycled = cycle(word);
   julia> collect(take(cycled, 9))
   9-element Array{Char,1}:
   'J'
   'u'
   'l'
   'i'
   'a'
   'J'
   'u'
   'l'
   'i'

   This example shows how to cycle through a string.

Common mistake example:

julia> arr = [1, 2, 3];
julia> cycled = cycle(arr);
julia> take(cycled, 0)

In this example, the take function is used with a count of 0. It results in an empty collection because no elements are taken. It's important to provide a positive count value when using take with cycle to retrieve elements.

See Also

User Contributed Notes

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