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Whether golang slices need make, this article introduces the corresponding analysis and answer in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible method.

Slice is a special data structure in Golang, which is more convenient to use and manage data sets. Slices are built around the concept of dynamic arrays and can automatically grow and shrink as needed.

Create a slice through the make () function

To create a slice using Golang's built-in make () function, you need to pass in a parameter to specify the length of the slice:

/ / create an integer slice / / its length and capacity are 5 elements slice: = make ([] int, 5)

At this point, only the length of the slice is specified, then the capacity of the slice is equal to the length. You can also specify the length and capacity respectively:

/ / create an integer slice / / its length is 3 elements and its capacity is 5 elements slice: = make ([] int, 3,5)

When the length and capacity are specified respectively, the slice created, the length of the underlying array is the specified capacity, but all array elements cannot be accessed after initialization.

Note that Golang does not allow the creation of slices whose capacity is less than the length. When the capacity of the created slice is less than the length, an error will be reported at compile time:

/ / create an integer slice / / make it longer than the capacity myNum: = make ([] int, 5,3)

Create slices by literal amount

Another common way to create a slice is to use the literal amount of the slice, which is similar to creating an array, except that you don't need to specify a value in the [] operator. The initial length and capacity are determined based on the number of elements provided at initialization:

/ / create a string slice / / its length and capacity are 3 elements myStr: = [] string {"Jack", "Mark", "Nick"} / / create an integer slice / / its length and capacity are 4 elements myNum: = [] int {10, 20, 30, 40}

When you create a slice using the literal amount of slices, you can also set the initial length and capacity. All you need to do is give the required length and capacity as an index at initialization. The following syntax shows how to use an index to create a slice with a length and capacity of 100 elements:

/ / create string slices / / initialize the 100th element myStr: = [] string {99: ""} with an empty string. This is the answer to the question about whether golang slices need make. I hope the above content can be of some help to you. If you still have a lot of doubts to be solved, you can follow the industry information channel for more related knowledge.

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