Add double randomizer

64json · 64json · commit 134632ca5a90 · 2018-07-21T15:49:11.000+09:00
diff --git a/languages/java/src/main/java/org/algorithm_visualizer/tracers/Randomize.java b/languages/java/src/main/java/org/algorithm_visualizer/tracers/Randomize.java
@@ -41,6 +41,34 @@ public java.lang.Integer create() {
         }
     }
 
+    public static class Double extends Randomizer {
+        @Override
+        protected Class getType() {
+            return java.lang.Double.class;
+        }
+
+        private double _min;
+        private double _max;
+
+        public Double(double min, double max) {
+            _min = min;
+            _max = max;
+        }
+
+        public Double(double min) {
+            this(min, 1);
+        }
+
+        public Double() {
+            this(0);
+        }
+
+        @Override
+        public java.lang.Double create() {
+            return random.nextDouble() * (_max - _min) + _min;
+        }
+    }
+
     public static class String extends Randomizer {
         @Override
         protected Class getType() {
diff --git a/languages/js/src/Randomize.js b/languages/js/src/Randomize.js
@@ -12,7 +12,19 @@ class Integer extends Randomizer {
   }
 
   create() {
-    return (Math.random() * (this._max - this._min + 1) | 0) + this._min;
+    return Math.random() * (this._max - this._min + 1) + this._min | 0;
+  }
+}
+
+class Double extends Randomizer {
+  constructor(min = 0, max = 1) {
+    super();
+    this._min = min;
+    this._max = max;
+  }
+
+  create() {
+    return Math.random() * (this._max - this._min) + this._min;
   }
 }
 
diff --git a/specs/randomizers/Double.js b/specs/randomizers/Double.js
@@ -0,0 +1,18 @@
+export default {
+  name: 'Randomize.Double',
+  description: 'Create a random real number.',
+  methods: [{
+    name: 'Randomize.Double',
+    description: 'The real number would be between `min` (inclusive) and `max` (exclusive).',
+    return: 'new',
+    arguments: [
+      { name: 'min', type: 'double', default: '0' },
+      { name: 'max', type: 'double', default: '1' },
+    ],
+  }, {
+    name: 'create',
+    description: 'Create a random real number.',
+    return: 'double',
+    arguments: [],
+  }],
+};

Original file line number	Diff line number	Diff line change
`@@ -12,7 +12,19 @@ class Integer extends Randomizer {`
`12`	`12`	`}`
`13`	`13`
`14`	`14`	`create() {`
`15`		`- return (Math.random() * (this._max - this._min + 1) \| 0) + this._min;`
	`15`	`+ return Math.random() * (this._max - this._min + 1) + this._min \| 0;`
	`16`	`+ }`
	`17`	`+}`
	`18`	`+`
	`19`	`+class Double extends Randomizer {`
	`20`	`+ constructor(min = 0, max = 1) {`
	`21`	`+ super();`
	`22`	`+ this._min = min;`
	`23`	`+ this._max = max;`
	`24`	`+ }`
	`25`	`+`
	`26`	`+ create() {`
	`27`	`+ return Math.random() * (this._max - this._min) + this._min;`
`16`	`28`	`}`
`17`	`29`	`}`
`18`	`30`