iposva@google.com
3b3b6e5000
- Add a useable Random number generator. Review URL: https://chromiumcodereview.appspot.com//10389150 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@7860 260f80e4-7a28-3924-810f-c04153c831b5
98 lines
2.3 KiB
Dart
98 lines
2.3 KiB
Dart
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// A part of the dart:math library.
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/**
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* Base of the natural logarithms.
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*/
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final double E = 2.718281828459045;
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/**
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* Natural logarithm of 10.
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*/
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final double LN10 = 2.302585092994046;
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/**
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* Natural logarithm of 2.
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*/
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final double LN2 = 0.6931471805599453;
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/**
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* Base-2 logarithm of E.
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*/
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final double LOG2E = 1.4426950408889634;
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/**
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* Base-10 logarithm of E.
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*/
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final double LOG10E = 0.4342944819032518;
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/**
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* The PI constant.
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*/
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final double PI = 3.1415926535897932;
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/**
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* Square root of 1/2.
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*/
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final double SQRT1_2 = 0.7071067811865476;
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/**
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* Square root of 2.
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*/
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final double SQRT2 = 1.4142135623730951;
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/**
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* Parses a [String] representation of an [int], and returns
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* an [int]. Throws a [BadNumberFormatException] if [str]
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* cannot be parsed as an [int].
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*/
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int parseInt(String str) => MathNatives.parseInt(str);
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/**
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* Parses a [String] representation of a [double], and returns
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* a [double]. Throws a [BadNumberFormatException] if [str] cannot
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* be parsed as a [double].
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*/
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double parseDouble(String str) => MathNatives.parseDouble(str);
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num min(num a, num b) {
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int c = a.compareTo(b);
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if (c == 0) return a;
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if (c < 0) {
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if ((b is double) && b.isNaN()) return b;
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return a;
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}
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if ((a is double) && a.isNaN()) return a;
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return b;
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}
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num max(num a, num b) {
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// NaNs are handled correctly since the compareTo function always considers
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// them to be bigger than any other operand.
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return (a.compareTo(b) < 0) ? b : a;
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}
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/**
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* Returns the arc tangent of [a]/[b] with sign according to quadrant.
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*/
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double atan2(num a, num b) => MathNatives.atan2(a, b);
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/**
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* If the [exponent] is an integer the result is of the same type as [x].
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* Otherwise it is a [double].
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*/
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num pow(num x, num exponent) => MathNatives.pow(x, exponent);
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double sin(num x) => MathNatives.sin(x);
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double cos(num x) => MathNatives.cos(x);
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double tan(num x) => MathNatives.tan(x);
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double acos(num x) => MathNatives.acos(x);
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double asin(num x) => MathNatives.asin(x);
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double atan(num x) => MathNatives.atan(x);
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double sqrt(num x) => MathNatives.sqrt(x);
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double exp(num x) => MathNatives.exp(x);
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double log(num x) => MathNatives.log(x);
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