mathjs - npm Package Compare versions

Comparing version 0.5.0 to 0.6.0

package.json

 {
     "name": "mathjs",
-    "version": "0.5.0",
+    "version": "0.6.0",
     "description": "Math.js is an extensive math library for JavaScript and Node.js. It features real and complex numbers, units, matrices, a large set of mathematical functions, and a flexible expression parser.",
@@ -5,0 +5,0 @@ "author": "Jos de Jong <[e-mail]>",

README.md

@@ -14,5 +14,6 @@ ![math.js](https://raw.github.com/josdejong/mathjs/master/img/mathjs.png)
 - Supports numbers, complex numbers, units, strings, arrays, and matrices.
-- Contains a large set of built-in functions and constants.
 - Contains a flexible expression parser.
 - Compatible with JavaScript’s built-in Math library.
+- Supports chained operations.
+- A large set of built-in functions and constants.
 - No dependencies. Runs on any JavaScript engine.
@@ -89,3 +90,21 @@ - Easily extensible.
 
+Operations can be performed using:
 
+- regular function calls
+- chained operations (see [Selector](#selector))
+- expression parsing (see [Parser](#parser))
+
+```js
+// regular function call
+math.subtract(math.add(3, 4), 2);           // 5
+
+// chained operation
+math.select(3).add(4).subtract(2).done();   // 5
+
+// expression parser
+var parser = math.parser();
+parser.eval('3 + 4 - 2');                   // 5
+```
+
+
 ## Parser
@@ -146,2 +165,44 @@
 
+## Selector
+
+Math.js supports chaining operations by wrapping a value into a `Selector`.
+A selector can be created with the method `math.select(value)`.
+All methods available in the math namespace can be executed via the selector.
+The methods will be executed with the selectors value as first argument,
+followed by extra arguments provided by the method call itself.
+
+```js
+math.select(3)
+    .add(4)
+    .subtract(2)
+    .done();
+    // 5
+
+math.select( [[1, 2], [3, 4]] )
+    .set([1, 1], 8)
+    .multiply(3)
+    .done();
+    // [[24, 6], [9, 12]]
+```
+
+The Selector has a number of special functions:
+
+ - `done()`
+   Finalize the chained operation and return the selectors value.
+ - `valueOf()`
+   The same as `done()`, returns the selectors value.
+ - `toString()`
+   Executes `math.format(value)` onto the selectors value, returning
+   a string representation of the value.
+ - `get(index)`
+   Get a subselection of the selectors value. Only applicable when
+   the value has a method get, for example when value is a Matrix
+   or Array.
+ - `set(index, replacement)`
+   Replace a subselection of the selectors value. Only applicable
+   when the value has a method get, for example when value is a
+   Matrix or Array.
+
+
+
 ## Workspace
@@ -212,6 +273,9 @@
 
-Math.js supports complex numbers.
+Math.js supports complex numbers. Most methods can be executed with complex
+numbers as arguments.
 
 ```js
 var a = math.complex(2, 3);     // 2 + 3i
+a.re;                           // 2
+a.im;                           // 3
 var b = math.complex('4 - 2i'); // 4 - 2i
@@ -224,3 +288,7 @@ math.add(a, b);                 // 6 + i
 
-Math.js supports units.
+Math.js supports units. Basic operations `add`, `subtract`, `multiply`,
+and `divide` can be performed on units.
+Trigonometric methods like `sin` support units with an angle as argument.
+Units can be converted from one to another using method `in`,
+an the value of a unit can be retrieved using `toNumber`.
 
@@ -231,5 +299,8 @@ ```js
 math.add(a, b);                 // 0.65 m
+b.in('cm');                     // 10 cm  Alternatively: math.in(b, 'cm')
+b.toNumber('cm');               // 10
 
 var parser = math.parser();
 parser.eval('2 inch in cm');    // 5.08 cm
+parser.eval('cos(45 deg)');     // 0.7071067811865476
 ```
@@ -326,4 +397,6 @@
 - math.floor(x)
+- math.gcd(a, b, c, ...)
 - math.larger(x, y)
 - math.largereq(x, y)
+- math.lcm(a, b, c, ...)
 - math.log(x [, base])
@@ -395,4 +468,4 @@ - math.log10(x)
 - math.format([template, ] values)
-- math.help(fn)
 - math.import(filename | object, override)
+- math.select([x])
 - math.typeof(x)
@@ -496,2 +569,4 @@
 - Version 0.6.0
+    - Implement chained operations
+- Version 0.7.0
     - More on matrices
@@ -498,0 +573,0 @@ - Version 1.0.0

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