Go Basic Learning Three

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Go programming Language: Support concurrent, garbage collection of compiled system-level programming language! This paper is mainly based on the "Go Programming Basics" Open source video to learn and record notes.

An array of arrays

• To define the format of an array:var<varName>[n]<type> (n>=0, n表示数组元素个数)
• 数组长度也是类型的一部分, so arrays with different lengths are of different types
• Note 指向数组的指针 the distinction and指针数组
• Array is a value type in Go
• You can use = = or! = to compare between arrays, but you cannot use < or >
• You can use new to create an array, which returns a pointer to an array
• Go supports multidimensional arrays

Example:

package mainimport "fmt"  func main() {  // var a [2]int    a := [2]int{1,2}        fmt.Println(a)}

Printing results:

[1 2]

New Create Data

 // var a [2]int    a := [10]int{}    a[1] = 2    fmt.Println(a)    p := new([10]int)    p[1] = 2    fmt.Println(p)

Printing results:

➜  run arr.go[0 2 0 0 0 0 0 0 0 0]&[0 2 0 0 0 0 0 0 0 0]

Look, what's the difference between the top? The second line results with an address character&

Multidimensional arrays

a := [2][3]int{      {1, 2, 3},      {4, 5, 6}}  fmt.Println(a)

Printing results:

[[1 2 3] [4 5 6]]

Bubble Sort Method:

  Package Mainimport "FMT"//Bubble sort func main () {//... can represent an indeterminate number of elements a: = [...] Int{1, 4, 9, 2, 5, 0, A, a, 3} fmt. Println (a)//calculates the length of the array num: = Len (a) for I: = 0; i < num;  i++ {///outer loop, once per loop, will rank the maximum value in front for j: = i + 1; j < num; J + + {if a[i] < A[j] {Temp : = A[i] a[i] = a[j] a[j] = temp}}} fmt. Println (A)}