声明语法 Declaration syntax

The style of language used to creat new varaible, types, functions, etc.

与传统的声明方式不同

x int
p *int
a [3]int

处理复杂的语法情况会比较方便阅读。

问题: Which language's declaration syntax reads like English from left-to-right?
答: Go
比如:

Go 可以把函数当作一个类型放入函数的输入变量中，比如下方的 func(int, int) int，这是一个 input parameter type, 一个输入变量声明。

f func(func(int, int) int, int), int

这段代码有英语表达是: A function named 'f' that takes a function and an int as arguments and return an int.

Memory & code

In Go, varaibles are passed by vallue not reference.

func wrongExample() {
    x := 5
    increment(x)

    fmt.Println(x)
    /*
        stiull prints 5
        because the increment function
        received a copy of x
    */
}

func increment(x int) {
    x++
}

func goodExample() {
    x := 5
    x = increment(x)

    fmt.Println(x) // Correct answer as 6

}

func increment(x int) int {
    x++
    return x
}