append.go (1306B)
1 // Copyright 2018 The Hugo Authors. All rights reserved.
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 // http://www.apache.org/licenses/LICENSE-2.0
7 //
8 // Unless required by applicable law or agreed to in writing, software
9 // distributed under the License is distributed on an "AS IS" BASIS,
10 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
11 // See the License for the specific language governing permissions and
12 // limitations under the License.
13
14 package collections
15
16 import (
17 "errors"
18
19 "github.com/gohugoio/hugo/common/collections"
20 )
21
22 // Append appends the arguments up to the last one to the slice in the last argument.
23 // This construct allows template constructs like this:
24 // {{ $pages = $pages | append $p2 $p1 }}
25 // Note that with 2 arguments where both are slices of the same type,
26 // the first slice will be appended to the second:
27 // {{ $pages = $pages | append .Site.RegularPages }}
28 func (ns *Namespace) Append(args ...any) (any, error) {
29 if len(args) < 2 {
30 return nil, errors.New("need at least 2 arguments to append")
31 }
32
33 to := args[len(args)-1]
34 from := args[:len(args)-1]
35
36 return collections.Append(to, from...)
37 }