golang为[z] [y] [x] int定义数组int [x] [y] [z]有什么好处？ [关闭]

Question

I just start to learn some basic of golang, it is little strange for me when looking at the array define syntax.

C++/C#/Java all defines multi-dimensional arrays like:

int arr[X][Y][Z]; // C/C++
int[,,] arr = new int[X, Y, Z]; // C#
int[][][] multi = new int[X][Y][Z]; // Java

And in go:

var arr [Z][Y][X]int32 // go

what is the advantage about the syntax?

Answer 1

The Syntaxes of C# and Java were both inspired by C and inherit all the quirks of the C syntax. There is a nice article on why Go has a different syntax:

Go syntax

Languages outside the C family usually use a distinct type syntax in declarations. Although it's a separate point, the name usually comes first, often followed by a colon. Thus our examples above become something like (in a fictional but illustrative language)

x: int
p: pointer to int
a: array[3] of int

These declarations are clear, if verbose - you just read them left to right. Go takes its cue from here, but in the interests of brevity it drops the colon and removes some of the keywords:

x int
p *int
a [3]int

There is no direct correspondence between the look of [3]int and how to use a in an expression. (We'll come back to pointers in the next section.) You gain clarity at the cost of a separate syntax.