Swift language----tuples

Tuples are unique in swift, and there is no correlation type in OC

/*

It is a data structure, which is widely used in mathematics.

Similar to arrays or dictionaries

You can define a set of data

The data that makes up the tuple type is called the "element"

*/

The difference between a tuple, an array, and a dictionary

1. Use arrays to define a set of data

Let Infoarray = ["Wenjian", 18,1.88]

Gets the elements in the array

Let NameArray = infoarray[0]

2. Use a dictionary to define a set of data

Let infodict = ["Name": "Wenjian", "age": +, "height": 1.88]

Get the elements in the dictionary

Let namedict = infodict["Name"]

3. Use tuples to define a set of data

Let Infotuple = ("Wenjian", 18,1.88)

Gets the elements in the tuple

Let nametuple = infotuple.0

4. Using tuples to define a network request error

Array

Let Errorarray = ["Not Found", 404]

Dictionary

Let errodict = ["erromsg": "Not Found", "Errocode": 404]

Meta-group

Let Errotuple = ("Not Found", 404)

errotuple.0

Alias all elements in a tuple

Let ErroTuple1 = (erromsg: "Not Found", errocode:404)

Errotuple1.erromsg = = erroTuple1.0

Errotuple1.errocode = = erroTuple1.1

The tuple's alias is the name of the tuple

Let (erromsg,errocode) = ("Not Found", 404)

Erromsg

Errocode

Swift language----tuples