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52 lines
1004 B
Markdown
52 lines
1004 B
Markdown
# Combine Two Slices
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The `append` function can be used to create a new slice with the contents of
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the given slice and one or more items added to the end.
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We can add one or more items like so:
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```go
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s1 := []int{1, 2, 3, 4}
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s2 := append(s1, 5)
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s3 := append(s2, 6, 7, 8)
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fmt.Println(s1) //=> [1 2 3 4]
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fmt.Println(s2) //=> [1 2 3 4 5]
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fmt.Println(s3) //=> [1 2 3 4 5 6 7 8]
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```
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But what if we have a second slice instead of individual items? We could import
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`slices` and use its `Concat` function. Or we can stick with `append` and
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unpack that slice as a series of arguments into the second part of `append`
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using `slice...`.
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```go
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s4 := append(s2, s1...)
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fmt.Println(s4) //=> [1 2 3 4 5 1 2 3 4]
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```
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Here is the full example:
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```go
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package main
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import (
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"fmt"
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)
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func main() {
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s1 := []int{1, 2, 3, 4}
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s2 := append(s1, 5)
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s3 := append(s2, 6, 7, 8)
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fmt.Println(s1)
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fmt.Println(s2)
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fmt.Println(s3)
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s4 := append(s2, s1...)
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fmt.Println(s4)
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}
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```
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[source](https://pkg.go.dev/builtin#append)
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