Working with slices

A slice is a view over an array. You may be dealing with multiple slices that work with the same underlying data.

The zero-value for a slice is nil. Reading or writing a nil slice will panic; however, you can append to a nil slice, which will create a new slice.

Creating slices

There are several ways a slice can be created.

How to do it...

Use make(sliceType,length[,capacity]):

slice1 := make([]int,0)
// len(slice1)=0, cap(slice1)=0
slice2 := make([]int,0,10)
// len(slice2)=0, cap(slice2)=10
slice3 := make([]int,10)
// len(slice3)=10, cap(slice3)=10

In the previous code snippet, you see three different uses of make to create a slice:

• slice1:=make([]int,0) creates an empty slice, 0 being the length of the slice. The slice1 variable is initialized as a non-nil, 0-length slice.
• slice2 := make([]int,0,10) creates an empty slice with capacity 10. This is what you should prefer if you know the likely maximum size for this slice. This slice...