golang integer to array

For integer data types in Golang, sometimes we need to convert integer data into array form. This requirement usually occurs when performing bit operations on integer data, such as splitting a 32-bit integer data into four 8-bit data, or splitting a 64-bit integer data into 8 pieces of 8-bit data.

So how to convert integer data into array form? In Golang, we can use bit operations and type conversion operations to achieve this purpose.

Let's take the example of splitting a 32-bit integer data into four 8-bit data as an example.

Step 1: Define integer data

First we need to define a 32-bit integer data, which can be created using the uint32 type:

var num uint32 = 0x12345678

Step 2: Convert integer data to byte array

Secondly, we need to convert this 32-bit integer data into a byte array with a length of 4. This process can be used Bit operations are implemented:

bytes := make([]byte, 4)
bytes[0] = byte(num & 0xFF)
bytes[1] = byte((num > > 8) & 0xFF)
bytes[2] = byte((num >> 16) & 0xFF)
bytes[3] = byte((num >> 24) & 0xFF)

Here, we take out the low 8 bits, middle 8 bits and high 8 bits of num respectively, and then store them in byte arrays respectively.

Step 3: Print the byte array

Finally, we can print the byte array and view the conversion result:

fmt.Println(bytes)

Output result It is:

[120 86 52 18]

where each hexadecimal number represents an 8-bit data, that is:

120 -> 01111000
86 -> 01010110
52 -> 00110100
18 -> 00010010

Through the above steps, we can convert a 32-bit integer data into 4 8-bit byte array.

Of course, for integer data with other digits and formats, corresponding modifications can be made based on this basic process. At the same time, it should be noted that when performing bit operations, we need to use forced type conversion to ensure the consistency of the data type. This can be done using Golang's built-in type conversion function.

To sum up, through bit operations and type conversion operations, we can easily convert integer data into array form to meet the needs of various bit operations.

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