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| -rw-r--r-- | go.html.markdown | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/go.html.markdown b/go.html.markdown index 656b1051..ba65d1e5 100644 --- a/go.html.markdown +++ b/go.html.markdown @@ -101,6 +101,20 @@ can include line breaks.` // Same string type. var d2 [][]float64 // Declaration only, nothing allocated here. bs := []byte("a slice") // Type conversion syntax. + // Because they are dynamic, slices can be appended to on-demand. + // To append elements to a slice, built-in append() function is used. + // First argument is a slice to which we are appending. Commonly, + // the array variable is updated in place, as in example below. + s := []int{1, 2, 3} // Result is a slice of length 3. + s = append(s, 4, 5, 6) // Added 3 elements. Slice now has length of 6. + fmt.Println(s) // Updated slice is now [1 2 3 4 5 6] + // To append another slice, instead of list of atomic elements we can + // pass a reference to a slice or a slice literal like this, with a + // trailing elipsis, meaning take an array and unpack its elements, + // appending them to the slice. + s = append(s, []int{7, 8, 9}...) // Second argument is an array literal. + fmt.Println(s) // Updated slice is now [1 2 3 4 5 6 7 8 9] + p, q := learnMemory() // Declares p, q to be type pointer to int. fmt.Println(*p, *q) // * follows a pointer. This prints two ints. |