mirror of
https://github.com/flutter/flutter.git
synced 2026-02-20 02:29:02 +08:00
19dfde6989
* Remove unnecessary null checks in flutter/foundation * Remove unnecessary null checks in flutter/services * Remove unnecessary null checks in flutter/physics
22 lines
784 B
Dart
22 lines
784 B
Dart
// Copyright 2014 The Flutter Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
/// Whether two doubles are within a given distance of each other.
|
|
///
|
|
/// The `epsilon` argument must be positive and not null.
|
|
/// The `a` and `b` arguments may be null. A null value is only considered
|
|
/// near-equal to another null value.
|
|
bool nearEqual(double? a, double? b, double epsilon) {
|
|
assert(epsilon >= 0.0);
|
|
if (a == null || b == null) {
|
|
return a == b;
|
|
}
|
|
return (a > (b - epsilon)) && (a < (b + epsilon)) || a == b;
|
|
}
|
|
|
|
/// Whether a double is within a given distance of zero.
|
|
///
|
|
/// The epsilon argument must be positive.
|
|
bool nearZero(double a, double epsilon) => nearEqual(a, 0.0, epsilon);
|