如何声明一个数组(或等效数组)?

时间:2021-03-09 20:57:32

I want to do something like(it's valid)

我想做一些事情,比如(它是有效的)

var myArray [9][3]int

but when I do

但是当我做

var myArray [someIntVariable][anotherOne]int

It can't be used(I know why, so I'm not asking this.) But is there any alternative to make this work?

它不能用(我知道为什么,所以我没有问这个)但是,有没有其他的办法可以让它发挥作用呢?

Sorry for my bad English.

对不起,我的英语不好。

3 个解决方案

#1


5  

Does the following work for you?

下面这些对你有用吗?

func make2dArray(m, n int) [][]int { 
   myArray := make([][]int, m) 
   for i := range myArray { 
      myArray[i] = make([]int, n) 
   } 
   return myArray 
} 

var myArray := make2dArray(someIntVariable, anotherOne)

#2


1  

"array" types in Go include the length as part of the type, so they are only good for things where the length is fixed at compile time (similar to "arrays" in C before C99). If you want "arrays" whose length is determined only at runtime (e.g. arrays in Java), what you really want is a "slice". mepcotterell's answer shows you how to create a slice of slices.

Go中的“数组”类型包括长度作为类型的一部分,因此它们只适用于在编译时固定长度的情况(类似于C99之前C中的“数组”)。如果您希望“数组”的长度仅在运行时确定(例如Java中的数组),那么您真正需要的是“切片”。mepcotterell的答案向您展示了如何创建切片。

#3


0  

You can also be interested in a generic matrix package:

您也可以对通用矩阵包感兴趣:

gomatrix

gomatrix

#1


5  

Does the following work for you?

下面这些对你有用吗?

func make2dArray(m, n int) [][]int { 
   myArray := make([][]int, m) 
   for i := range myArray { 
      myArray[i] = make([]int, n) 
   } 
   return myArray 
} 

var myArray := make2dArray(someIntVariable, anotherOne)

#2


1  

"array" types in Go include the length as part of the type, so they are only good for things where the length is fixed at compile time (similar to "arrays" in C before C99). If you want "arrays" whose length is determined only at runtime (e.g. arrays in Java), what you really want is a "slice". mepcotterell's answer shows you how to create a slice of slices.

Go中的“数组”类型包括长度作为类型的一部分,因此它们只适用于在编译时固定长度的情况(类似于C99之前C中的“数组”)。如果您希望“数组”的长度仅在运行时确定(例如Java中的数组),那么您真正需要的是“切片”。mepcotterell的答案向您展示了如何创建切片。

#3


0  

You can also be interested in a generic matrix package:

您也可以对通用矩阵包感兴趣:

gomatrix

gomatrix