es6-shim - npm Package Compare versions

Comparing version 0.3.1 to 0.4.0

CHANGELOG.md

@@ -0,1 +1,6 @@
+## es6-shim 0.4.0 (February 8, 2012)
+* Added Math.log10, Math.log2, Math.log1p, Math.expm1, Math.cosh,
+Math.sinh, Math.tanh, Math.acosh, Math.asinh, Math.atanh, Math.hypot,
+Math.trunc.
+
 ## es6-shim 0.3.1 (January 30, 2012)
@@ -2,0 +7,0 @@ * Added IE8 support.

es6-shim.js

@@ -9,2 +9,9 @@ ({define: (typeof define === 'function')
   var global_isFinite = globall.isFinite;
+  var factorial = function(value) {
+    var result = 1;
+    for (var i = 2; i <= value; i++) {
+      result *= i;
+    }
+    return result;
+  };
 
@@ -149,5 +156,61 @@ var defineProperty = function(object, name, method) {
     }
-  });
+  });  
   
   defineProperties(Math, {
+    acosh: function(value) {
+      return Math.log(value + Math.sqrt(value * value - 1));
+    },
+    
+    asinh: function(value) {
+      return Math.log(value + Math.sqrt(value * value + 1));
+    },
+    
+    atanh: function(value) {
+      return 0.5 * Math.log((1 + value) / (1 - value));
+    },
+
+    cosh: function(value) {
+      if (value < 0) value = -value;
+      if (value > 21) return Math.exp(value) / 2;
+      return (Math.exp(value) + Math.exp(-value)) / 2;
+    },
+    
+    expm1: function(value) {
+      var result = 0;
+      var n = 50;
+      for (var i = 1; i < n; i++) {
+        result += Math.pow(value, i) / factorial(i);
+      }
+      return result;
+    },
+    
+    hypot: function(x, y) {
+      return Math.sqrt(x * x + y * y) || 0;
+    },
+
+    log2: function(value) {
+      return Math.log(value) * (1 / Math.LN2);
+    },
+    
+    log10: function(value) {
+      return Math.log(value) * (1 / Math.LN10);
+    },
+    
+    log1p: function(value) {
+      var result = 0;
+      var n = 50;
+
+      if (value <= -1) return -Infinity;
+      if (value < 0 || value > 1) return Math.log(1 + value);
+      for (var i = 1; i < n; i++) {
+        if ((i % 2) === 0) {
+          result -= Math.pow(value, i) / i;
+        } else {
+          result += Math.pow(value, i) / i;
+        }
+      }
+
+      return result;
+    },
+
     sign: function(value) {
@@ -157,2 +220,14 @@ var number = +value;
       return (number < 0) ? -1 : 1;
+    },
+    
+    sinh: function(value) {
+      return (Math.exp(value) - Math.exp(-value)) / 2;
+    },
+    
+    tanh: function(value) {
+      return (Math.exp(value) - Math.exp(-value)) / (Math.exp(value) + Math.exp(-value));
+    },
+    
+    trunc: function(value) {
+      return ~~value;
     }
@@ -159,0 +234,0 @@ });

package.json

@@ -5,3 +5,3 @@ {
   "description": "ECMAScript 6 (Harmony) compatibility shims for legacy JavaScript engines",
-  "version": "0.3.1",
+  "version": "0.4.0",
   "homepage": "https://github.com/paulmillr/es6-shim/",
@@ -8,0 +8,0 @@ "repository": {

README.md

@@ -21,3 +21,5 @@ # ES6 Shim
 Object.getPropertyNames, Object.is, Object.isnt
-* Math.sign
+* Math.sign, Math.log10, Math.log2, Math.log1p, Math.expm1, Math.cosh,
+Math.sinh, Math.tanh, Math.acosh, Math.asinh, Math.atanh, Math.hypot,
+Math.trunc
 
@@ -24,0 +26,0 @@ ## IE8 support

test/array.js

@@ -1,4 +0,1 @@
-var expect = require('expect.js');
-require('../');
-
 describe('Array', function() {
@@ -5,0 +2,0 @@ describe('Array.from()', function() {

test/collections.js

@@ -1,4 +0,1 @@
-var expect = require('expect.js');
-require('../');
-
 // Big thanks to V8 folks for test ideas.
@@ -5,0 +2,0 @@ // v8/test/mjsunit/harmony/collections.js

test/math.js

@@ -1,26 +0,111 @@
-var expect = require('expect.js');
-require('../');
+var Assertion = expect().constructor;
+Assertion.prototype.almostEqual = function(obj) {
+  var allowedDiff = 1e-11;
+  return this.within(obj - allowedDiff, obj + allowedDiff);
+}
 
 describe('Math', function() {
-  describe('Math.sign()', function() {
-    it('should be 1 on positive values', function() {
+  describe('#acosh()', function() {
+    it('should be correct', function() {
+      expect(Math.acosh(1234)).to.almostEqual(7.811163220849231);
+      expect(Math.acosh(8.88)).to.almostEqual(2.8737631531629235);
+    });
+  });
+
+  describe('#asinh()', function() {
+    it('should be correct', function() {
+      expect(Math.asinh(1234)).to.almostEqual(7.811163549201245);
+      expect(Math.asinh(9.99)).to.almostEqual(2.997227420191335);
+    });
+  });
+
+  describe('#atanh()', function() {
+    it('should be correct', function() {
+      expect(Math.atanh(0.5)).to.almostEqual(0.5493061443340549);
+      expect(Math.atanh(-0.5)).to.almostEqual(-0.5493061443340549);
+      expect(Math.atanh(-0.5)).to.almostEqual(-0.5493061443340549);
+      expect(Math.atanh(0.444)).to.almostEqual(0.47720201260109457);
+    });
+  });
+
+  describe('#cosh()', function() {
+    it('should be correct', function() {
+      expect(Math.cosh(12)).to.almostEqual(81377.39571257407);
+      expect(Math.cosh(0)).to.almostEqual(1);
+      expect(Math.cosh(-10)).to.almostEqual(11013.232920103323);
+    });
+  });
+
+  describe('#expm1()', function() {
+    it('should be correct', function() {
+      expect(Math.expm1(10)).to.almostEqual(22025.465794806718);
+      expect(Math.expm1(-10)).to.almostEqual(-0.9999546000702375);
+    });
+  });
+
+  describe('#hypot()', function() {
+    it('should be correct', function() {
+      expect(Math.hypot(66, 66)).to.almostEqual(93.33809511662427);
+      expect(Math.hypot(0.1, 100)).to.almostEqual(100.0000499999875);
+    });
+  });
+
+  describe('#log2()', function() {
+    it('should be correct', function() {
+      expect(Math.log2(5)).to.almostEqual(2.321928094887362);
+      expect(Math.log2(32)).to.almostEqual(5);
+    });
+  });
+
+  describe('#log10', function() {
+    it('should be correct', function() {
+      expect(Math.log10(5)).to.almostEqual(0.6989700043360189);
+      expect(Math.log10(50)).to.almostEqual(1.6989700043360187);
+    });
+  });
+
+  describe('#log1p', function() {
+    it('should be correct', function() {
+      expect(Math.log1p(5)).to.almostEqual(1.791759469228055);
+      expect(Math.log1p(50)).to.almostEqual(3.9318256327243257);
+    });
+  });
+
+  describe('#sign()', function() {
+    it('should be correct', function() {
       [Infinity, 1].forEach(function(value) {
         expect(Math.sign(value)).to.equal(1);
       });
-    });
 
-    it('should be -1 on negative values', function() {
       [-Infinity, -1].forEach(function(value) {
         expect(Math.sign(value)).to.equal(-1);
       });
-    });
-    
-    it('should be 0 on 0', function() {
+
       expect(Math.sign(0)).to.equal(0);
+      expect(Number.isNaN(Math.sign(NaN))).to.be.ok();
     });
-    
-    it('should be NaN on NaN', function() {
-      expect(isNaN(Math.sign(NaN))).to.be.ok();
+  });
+
+  describe('#sinh()', function() {
+    it('should be correct', function() {
+      expect(Math.sinh(-5)).to.almostEqual(-74.20321057778875);
+      expect(Math.sinh(2)).to.almostEqual(3.6268604078470186);
     });
   });
+
+  describe('#tanh()', function() {
+    it('should be correct', function() {
+      expect(Math.tanh(90)).to.almostEqual(1);
+      expect(Math.tanh(10)).to.almostEqual(0.9999999958776927);
+    });
+  });
+
+  describe('#trunc()', function() {
+    it('should be correct', function() {
+      expect(Math.trunc(1.01)).to.equal(1);
+      expect(Math.trunc(1.99)).to.equal(1);
+      expect(Math.trunc(-555.555)).to.equal(-555);
+      expect(Math.trunc(-1.99)).to.equal(-1);
+    });
+  });
 });

test/number.js

@@ -1,4 +0,1 @@
-var expect = require('expect.js');
-require('../');
-
 describe('Number', function() {
@@ -5,0 +2,0 @@ var integers = [5295, -5295, -9007199254740991, 9007199254740991, 0, -0];

test/object.js

@@ -1,4 +0,1 @@
-var expect = require('expect.js');
-require('../');
-
 describe('Object', function() {
@@ -5,0 +2,0 @@ describe('Object.is()', function() {

test/string.js

@@ -1,4 +0,1 @@
-var expect = require('expect.js');
-require('../');
-
 describe('String', function() {
@@ -5,0 +2,0 @@ describe('#repeat()', function() {

No alert changes

Improved metrics

Total package byte prevSize

28869

increased by19.04%

Number of package files

15

increased by7.14%

Lines of code

704

increased by22.01%

Number of lines in readme file

55

increased by3.77%

No dependency changes