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23 lines
882 B
Dart
23 lines
882 B
Dart
// Copyright 2020 Kenton Hamaluik
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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extension StartOfWeek on DateTime {
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DateTime startOfWeek({int startOfWeekDay = DateTime.sunday}) {
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// change to Sunday as start..
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int diff = (7 + (weekday - startOfWeekDay)) % 7;
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DateTime dt = add(Duration(days: -diff));
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return DateTime(dt.year, dt.month, dt.day);
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}
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}
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