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[Cater-Waiter]: Fix Broken Links to exercism.io in Hints.md File #3773

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[Cater-Waiter]: Fix Broken Links to exercism.io in Hints.md File #3773

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32 changes: 16 additions & 16 deletions exercises/concept/cater-waiter/.docs/hints.md
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Expand Up @@ -10,52 +10,52 @@

## 1. Clean up Dish Ingredients

- The `set()` constructor can take any [iterable][iterable] as an argument. [lists:python/lists](https://exercism.lol/tracks/python/concepts/lists) are iterable.
- Remember: [tuples:python/tuples](https://exercism.lol/tracks/python/concepts/tuples) can be formed using `(<element_1>, <element_2>)` or via the `tuple()` constructor.
- The `set()` constructor can take any [iterable][iterable] as an argument. [concept: lists](/tracks/python/concepts/lists) are iterable.
- Remember: [concept: tuples](/tracks/python/concepts/tuples) can be formed using `(<element_1>, <element_2>)` or via the `tuple()` constructor.

## 2. Cocktails and Mocktails

- A `set` is _disjoint_ from another set if the two sets share no elements.
- The `set()` constructor can take any [iterable][iterable] as an argument. [lists:python/lists](https://exercism.lol/tracks/python/concepts/lists) are iterable.
- In Python, [strings:python/strings](https://exercism.lol/tracks/python/concepts/strings) can be concatenated with the `+` sign.
- The `set()` constructor can take any [iterable][iterable] as an argument. [concept: lists](/tracks/python/concepts/lists) are iterable.
- In Python, [concept: strings](/tracks/python/concepts/strings) can be concatenated with the `+` sign.

## 3. Categorize Dishes

- Using [loops:python/loops](https://exercism.lol/tracks/python/concepts/loops) to iterate through the available meal categories might be useful here.
- Using [concept: loops](/tracks/python/concepts/loops) to iterate through the available meal categories might be useful here.
- If all the elements of `<set_1>` are contained within `<set_2>`, then `<set_1> <= <set_2>`.
- The method equivalent of `<=` is `<set>.issubset(<iterable>)`
- [tuples:python/tuples](https://exercism.lol/tracks/python/concepts/tuples) can contain any data type, including other tuples. Tuples can be formed using `(<element_1>, <element_2>)` or via the `tuple()` constructor.
- Elements within [tuples:python/tuples](https://exercism.lol/tracks/python/concepts/tuples) can be accessed from the left using a 0-based index number, or from the right using a -1-based index number.
- The `set()` constructor can take any [iterable][iterable] as an argument. [lists:python/lists](https://exercism.lol/tracks/python/concepts/lists) are iterable.
- [strings:python/strings](https://exercism.lol/tracks/python/concepts/strings) can be concatenated with the `+` sign.
- [concept: tuples](/tracks/python/concepts/tuples) can contain any data type, including other tuples. Tuples can be formed using `(<element_1>, <element_2>)` or via the `tuple()` constructor.
- Elements within [concept: tuples](/tracks/python/concepts/tuples) can be accessed from the left using a 0-based index number, or from the right using a -1-based index number.
- The `set()` constructor can take any [iterable][iterable] as an argument. [concept: lists](/tracks/python/concepts/lists) are iterable.
- [concept: strings](/tracks/python/concepts/strings) can be concatenated with the `+` sign.

## 4. Label Allergens and Restricted Foods

- A set _intersection_ are the elements shared between `<set_1>` and `<set_2>`.
- The set method equivalent of `&` is `<set>.intersection(<iterable>)`
- Elements within [tuples:python/tuples](https://exercism.lol/tracks/python/concepts/tuples) can be accessed from the left using a 0-based index number, or from the right using a -1-based index number.
- The `set()` constructor can take any [iterable][iterable] as an argument. [lists:python/lists](https://exercism.lol/tracks/python/concepts/lists) are iterable.
- [tuples:python/tuples](https://exercism.lol/tracks/python/concepts/tuples) can be formed using `(<element_1>, <element_2>)` or via the `tuple()` constructor.
- Elements within [concept: tuples](/tracks/python/concepts/tuples) can be accessed from the left using a 0-based index number, or from the right using a -1-based index number.
- The `set()` constructor can take any [iterable][iterable] as an argument. [concept: lists](/tracks/python/concepts/lists) are iterable.
- [concept: tuples](/tracks/python/concepts/tuples) can be formed using `(<element_1>, <element_2>)` or via the `tuple()` constructor.

## 5. Compile a "Master List" of Ingredients

- A set _union_ is where `<set_1`> and `<set_2>` are combined into a single `set`
- The set method equivalent of `|` is `<set>.union(<iterable>)`
- Using [loops:python/loops](https://exercism.lol/tracks/python/concepts/loops) to iterate through the various dishes might be useful here.
- Using [concept: loops](/tracks/python/concepts/loops) to iterate through the various dishes might be useful here.

## 6. Pull out Appetizers for Passing on Trays

- A set _difference_ is where the elements of `<set_2>` are removed from `<set_1>`, e.g. `<set_1> - <set_2>`.
- The set method equivalent of `-` is `<set>.difference(<iterable>)`
- The `set()` constructor can take any [iterable][iterable] as an argument. [lists:python/lists](https://exercism.lol/tracks/python/concepts/lists) are iterable.
- The [list:python/lists](https://exercism.lol/tracks/python/concepts/lists) constructor can take any [iterable][iterable] as an argument. Sets are iterable.
- The `set()` constructor can take any [iterable][iterable] as an argument. [concept: lists](/tracks/python/concepts/lists) are iterable.
- The [concept: list](/tracks/python/concepts/lists) constructor can take any [iterable][iterable] as an argument. Sets are iterable.

## 7. Find Ingredients Used in Only One Recipe

- A set _symmetric difference_ is where elements appear in `<set_1>` or `<set_2>`, but not **_both_** sets.
- A set _symmetric difference_ is the same as subtracting the `set` _intersection_ from the `set` _union_, e.g. `(<set_1> | <set_2>) - (<set_1> & <set_2>)`
- A _symmetric difference_ of more than two `sets` will include elements that are repeated more than two times across the input `sets`. To remove these cross-set repeated elements, the _intersections_ between set pairs needs to be subtracted from the symmetric difference.
- Using [loops:python/loops](https://exercism.lol/tracks/python/concepts/loops) to iterate through the various dishes might be useful here.
- Using [concept: loops](/tracks/python/concepts/loops) to iterate through the various dishes might be useful here.


[hashable]: https://docs.python.org/3.7/glossary.html#term-hashable
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