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util.go
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/
util.go
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// Copyright 2019 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package util
// ImgDirname is where a codelab images are stored,
// relative to the codelab dir.
const ImgDirname = "img"
// Unique de-dupes a.
// The argument a is not modified.
func Unique(a []string) []string {
seen := make(map[string]struct{}, len(a))
res := make([]string, 0, len(a))
for _, s := range a {
if _, y := seen[s]; !y {
res = append(res, s)
seen[s] = struct{}{}
}
}
return res
}