Update README.md file

README.md

@@ -54,35 +54,57 @@ Animal/Dog -> [Mammal, Domesticated] {
 
 #### Function declaration
 
-##### Public function
+##### Public function (+fn)
 ```waddle
-+fn calculateArea(width: Integer, height: Integer) -> [Decimal] {
++fn calculateArea(Integer width, Integer height) -> [Integer] {
     rtn width.multiply(height);
 }
 ```
 
-##### Protected Function
+##### Protected Function (fn)
 ```waddle
-fn calculateArea(width: Integer, height: Integer) -> [Decimal] {
+fn calculateArea(Integer width, Integer height) -> [Integer] {
     rtn width.multiply(height);
 }
 ```
 
-##### Private Function
+##### Private Function (-fn)
 ```waddle
--fn calculateArea(width: Integer, height: Integer) -> [Decimal] {
+-fn calculateArea(Integer width, Integer height) -> [Integer] {
+    rtn width.multiply(height);
+}
+```
+
+#### Default Values
+```waddle
+fn calculateArea(Integer width.default(0), Integer height.default(0)) -> [Integer] {
     rtn width.multiply(height);
 }
 ```
 
 ##### Lambda expression
 ```waddle
-areaCalculator = fn(width: Integer, height: Integer) -> [Decimal] {
+areaCalculator = fn(Integer width, Integer height) -> [Integer] {
     rtn width.multiply(height);
 }
 ```
 
+#### Concurrency Function (async)
+```waddle
++proc fetchData(String url) -> [String] {
+    rtn my.network.get(url);
+}
+
+proc fetchData(String url) -> [String] {
+    rtn my.network.get(url);
+}
+
+-proc fetchData(String url) -> [String] {
+    rtn my.network.get(url);
+}
+```
 ### Error Handling
+#### Try/Catch (attempt->[ok, error])
 ```waddle
 result = riskyOperation().attempt {
     ok {
@@ -101,6 +123,29 @@ result = riskyOperation().attempt {
     }
 }
 
+```
+#### Custom error type declaration
+```waddle
+MathError {
+    message: String;
+    errorCode: Integer;
+}
+```
+#### Function with explicit error handling
+```waddle
++fn divide(Integer a, Integer b) -> [Decimal] fails with MathError {
+    if (b.eq(0)) {
+        my.error.fail(MathError("Division by zero", 1));
+    }
+    rtn a.divide(b);
+}
+```
+
+### Resource Management / Context Management
+```waddle
+using DatabaseConnection db.set(connectionString) {
+    db.execute(query);
+}
 ```
 
 ### Iteration
@@ -147,6 +192,27 @@ nums.each(
 
 ```
 
+### Boolean Expressions
+#### Explicit Boolean Checks
+```waddle
+result = Boolean.and(
+    my.age.gt(18), 
+    my.status.is(Verified)
+);
+```
+#### Object Method Boolean Checks
+```waddle
+if(my.age.gt(18).and(my.status.is(Verified))){
+    my.age.gt(18), 
+    my.status.is(Verified)
+}
+```
+
+### Explicit Type Conversion
+```waddle
+String myString.set(my.number.set(42).as(String));
+```
+
 ## Type System
 
 ### Primitive Types