Example
Slices are the typical way go programmers store lists of data.
To declare a slice variable use the []Type syntax.
var a []int
To declare and initialize a slice variable in one line use the []Type{values} syntax.
var a []int = []int{3, 1, 4, 1, 5, 9}
Another way to initialize a slice is with the make function. It three arguments: the Type of the slice (or map), the length, and the capacity.
a := make([]int, 0, 5)
You can add elements to your new slice using append.
a = append(a, 5)
Check the number of elements in your slice using len.
length := len(a)
Check the capacity of your slice using cap. The capacity is the number of elements currently allocated to be in memory for the slice. You can always append to a slice at capacity as Go will automatically create a bigger slice for you.
capacity := cap(a)
You can access elements in a slice using typical indexing syntax.
a[0] // Gets the first member of `a`
You can also use a for loop over slices with range. The first variable is the index in the specified array, and the second variable is the value for the index.
for index, value := range a {
fmt.Println("Index: " + index + " Value: " + value) // Prints "Index: 0 Value: 5" (and continues until end of slice)
}
