delete.md

67 - delete

1. delete a assigns the initial value for the type to a

2. For integers it is equivalent to a = 0

3. For arrays, it assigns a dynamic array of length zero or a static array of the same length with all elements set to their initial value

4. delete a[x] deletes the item at index x of the array and leaves all other elements and the length of the array untouched

5. For structs, it assigns a struct with all members reset

6. delete has no effect on mappings. So if you delete a struct, it will reset all members that are not mappings and also recurse into the members unless they are mappings.

7. For mappings, individual keys and what they map to can be deleted: If a is a mapping, then delete a[x] will delete the value stored at x

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Slide Screenshot

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Slide Deck

• delete a -> Assigns Initial Value to a
  • Ints -> 0
  • Dynamic Arrays -> Length 0
  • Static Arrays -> Same Length, Initial Value Elements
  • Arr[x] -> Deletes Item @ x
  • Structs -> Members Reset Unless Mappings
  • Mappings -> No Effect
  • Specific Key -> Values @ Key Deleted

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References

• Youtube Reference