Data object storage in Go language

With the rapid development of the Internet, the era of big data has arrived, and data storage has become one of the most important tasks. The emergence of various programming languages ​​has also made the storage of data objects more flexible and efficient. Among them, Go language has advantages in data object storage.

1. Go language data objects

The data objects of Go language include pointers, arrays, slices, and Maps, etc. Pointer and array data storage are relatively simple and will not be elaborated here. This article focuses on two types of data object storage: slices and Maps.

2. Slicing data storage

Slicing is an important data object storage in the Go language. It is similar to a dynamic array, but more flexible than a dynamic array. Slices can expand or shrink as needed, whereas arrays cannot change their length once created. The storage of slices is based on the underlying array, and changes in the elements in the slice will directly affect the values ​​of the underlying array elements.

Definition and initialization of slices:

var slice1 []int //Define a nil slice
slice2 := make([]int, 3) //Define a nil slice Slice of 3
slice3 := []int{1, 2, 3} //Define a slice with initial values ​​1, 2, 3

Slice operation:

1 .Access slice elements

slice3[0] //Access the first element in the slice
slice3[len(slice3)-1] //Access the last element in the slice

2. Append elements

slice3 = append(slice3, 4) //Insert an element at the end of the slice
slice3 = append(slice3, 5, 6) //Insert two elements at the end of the slice
slice3 = append([]int{0}, slice3...) //Insert an element in front of the slice
slice3 = append([]int{-3,-2,-1}, slice3...) / /Insert three elements in front of the slice
slice3 = append(slice3[:2], append([]int{88, 99}, slice3[2:]...)...) //In the slice th Insert two elements before three elements

3. Delete elements

slice3 = append(slice3[:2], slice3[3:]...) //Delete the third element in the slice elements
slice3 = append(slice3[:3], slice3[4:]...) //Delete the 4th element in the slice
slice3 = append(slice3[:len(slice3)-1] , slice3[len(slice3)-1 1:]...) //Delete the last element in the slice

3. Map data storage

Map is another important data object storage , which stores key-value pairs. Compared with arrays and slices, Map storage is non-incremental. Map is an unordered collection of key-value pairs. Each key can only appear once and can be of any type, but the value can be of any type.

Map definition and initialization:

var m1 map[string]int //Define an empty map
m2 := make(map[string]int) //Define an empty map map
m3 := map[string]int{} //Define an empty map
m4 := make(map[string]int, 10) //Define a map
m5 with initial capacity: = map[string]int{"hello": 1, "world": 2} //Define an initialized map

Map operations:

1. Add elements

m5["Go"] = 3 //Add a key-value pair ("Go" is the key, 3 is the value)

2. Find the element

v, ok := m5 ["Go"] //Find the element with the key "Go". If it exists, return the value and true, otherwise return false

3. Delete the element

delete(m5, "Go" ) //Delete the element with the key "Go"

4. Advantages of Go language data object storage

1. It is very convenient to add and delete elements in slices and Maps, and does not affect other element.

2. Slices and Maps can automatically expand and shrink, and dynamically adjust memory usage.

3. Slicing and Map are unordered data storage methods, suitable for large-scale data storage and reading.

4. The storage of slices and Maps is based on underlying arrays. Using arrays to perform algorithms such as sorting and searching can more quickly meet data processing needs.

In short, the slicing and Map data storage methods of Go language are very flexible and efficient, and can meet the requirements of data processing in the Internet era. Therefore, Go language can be considered as a programming language of choice when developing large-scale data processing programs.

The above is the detailed content of Data object storage in Go language. For more information, please follow other related articles on the PHP Chinese website!