functions-in-java

Codind somrthing which is the basics of functional programming.

• Creating your own Fuction interface
• Creating your own Bifunction interface
• Converting a BiFunction/TriFunction to a function via currying.

Learning

• Replace if else with ternary operators, its more functional and has no side effects.
• use of instanceof is bad code
• Don't trust names, trust types, because types don't lie
• Zipping : taking to lists and converting them to a tuple
• Unzipping : Reverse of above
• Generic Functions are hard to write. But Generic methods are good.
• git rm -r --cached myFolder to delete folder/file without deleting the files from local
• Folding: converting a list into a single value by using a specific operation, the resulting value may be of different type.
• Reducing : Folding to a result of the same type as the list element.
• recursion : It starts from last step and defines its relationship with the preceding one.
• corecursion : It starts from first step and defines its relationship with the next one.
• foreach

  public static <T> void forEach(Collection<T> ts, Consumer<T> c){
          for (T t : ts){
              c.accept(t);
          }
      }