Go structs、slices、maps

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Go structs、slices、maps

1、定義時*在變數名後面,使用時*在變數名前面。

  

  

2、定義struct,type在前,struct關鍵字在後。

  

3、指標可以指定struct。

  

4、A struct literal denotes a newly allocated struct value by listing the values of its fields.

  You can list just a subset of fields by using the Name: syntax. (And the order of named fields is irrelevant.)

  

5、array定義。

  

6、A slice points to an array of values and also includes a length.

  []T is a slice with elements of type T.

  

7、Slices can be re-sliced, creating a new slice value that points to the same array.

  [a,b]取值區間為a->b-1。

  

8、Making slices

  

  

9、The zero value of a slice is nil.

  A nil slice has a length and capacity of 0.

  

  對於上式,z是nil.

10、通過append方法添加元素。

  

11、range在for中可用來迭代slices。

  

12、通過_可以略去索引。

  

13、Maps must be created with make (not new) before use

  

14、Map literals are like struct literals, but the keys are required.

  

15、可以省略Vertex。If the top-level type is just a type name, you can omit it from the elements of the literal.

  

16、map的操作

  

17、函數也是一個變數。

  

18、closure。

  

參考:https://tour.golang.org/moretypes/1

Go structs、slices、maps

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