Address PR comments

Author: mayasaxena

SwiftWisdom/Core/StandardLibrary/String/String+Trimmed.swift

@@ -10,10 +10,6 @@ import Foundation
 
 extension String {
     func ip_trimmed(toLength length: Int) -> String {
-        if ip_length > length {
-            return substring(to: index(startIndex, offsetBy: length))
-        } else {
-            return self
-        }
+        return String(characters.prefix(length))
     }
 }

SwiftWisdom/Rx/Rx+String.swift

@@ -8,6 +8,7 @@
 
 import Foundation
 import RxSwift
+import RxCocoa
 
 extension ObservableType where E == String {
     public func ip_limitLength(to limit: Int) -> Observable<E> {
@@ -21,14 +22,27 @@ extension ObservableType where E == String? {
     }
 }
 
+extension ControlPropertyType where E == String {
+    public func ip_limited(toLength length: Int) -> ControlProperty<String> {
+        let values: Observable<String> = asObservable().map { $0.ip_trimmed(toLength: length) }
+        let valueSink: AnyObserver<String> = mapObserver { $0 }
+        return ControlProperty<String>(values: values, valueSink: valueSink)
+    }
+}
+
 extension Reactive where Base: UITextField {
     /** Limit the length of input to a text field
 
     Usage Example:
 
      textField.rx.ip_limitLength(to: 5)
-    */
-    public func ip_limitLength(to limit: Int) -> Disposable {
+    
+    Note: This does not restrict length when the text property of the text field is modified directly e.g.
+     
+     textField.text = "A string over the limit"
+
+     */
+    public func ip_limitInputLength(to limit: Int) -> Disposable {
         return text.ip_limitLength(to: limit).bind(to: text)
     }
 }