Mercurial > gemma

comparison pkg/common/delta.go @ 5688:6281c18b109f sr-v2

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Finsh serializing v2 meshes.
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Mon, 12 Feb 2024 02:27:41 +0100
parents
children 9e9cedae718a
comparison
equal deleted inserted replaced
5687:8ff842858434 5688:6281c18b109f
1 // This is Free Software under GNU Affero General Public License v >= 3.0
2 // without warranty, see README.md and license for details.
3 //
4 // SPDX-License-Identifier: AGPL-3.0-or-later
5 // License-Filename: LICENSES/AGPL-3.0.txt
6 //
7 // Copyright (C) 2024 by via donau
8 // – Österreichische Wasserstraßen-Gesellschaft mbH
9 // Software engineering by Intevation GmbH
10 //
11 // Author(s):
12 // * Sascha L. Teichmann <sascha.teichmann@intevation.de>
13
14 package common
15
16 // Delta returns a function which returns its argument when called
17 // the first time and the delta to the last call afterwards.
18 func Delta() func(int64) int64 {
19 var last int64
20 first := true
21 return func(x int64) (y int64) {
22 if first {
23 first = false
24 y = x
25 last = x
26 } else {
27 y = x - last
28 last = x
29 }
30 return
31 }
32 }