Discovering Map function in clojure

Here it's the simple function in clojure using map

(map + [1 2 3] [4 5 6] [7 8 9]) 

then it returns

=> [12 15 18] It's nice an simple ;-)

My first function in clojure

This a simple recursive countdown, but in clojure is more interesting. This is the code:

(defn countdown [x]
 (if (zero? x)
  (do 
   :blastoff!
   (println "Zero")
  )
  (do
   (println x)
   (recur (dec x))
  )
 ) 
)

Translate simple program from Java to Clojure

In Java:

public static double hypot (double x, double y) {
 final double x2 = x * x;
 final double y2 = y * y;
 return Math.sqrt(x2 + y2);
}

In Clojure

(defn hypot [x y]
 (let [x2 (* x x)
  y2 (* y y)]
 (Math/sqrt (+ x2 y2))
  )
)

  The execution

(println (hypot 2 3))

My first code in clojure

I've finished reading Javascript The Good Parts. Yesterday a co-worker said to me that I could learn some functional language, He recommend to me Clojure son I've just started with Programming Clojure and this is my first little program:

(defn average [numbers]
 (/ 
 (apply + numbers)
 (count numbers)
 )
)

(println 
 (average [1 2 3 4 5])
)

When I was writing this little piece of code, I've remember when I was at university and I studied Lisp in IA signature.

List In Javascript

I've finished my new pet project: lists with fluent api and like a linq operations. It lives here
It appeared as a code kata, but it finished like a little library.

some tests

 

it("Given different lists with numbers when call zip method, return a list with zipped elements", function(){
   var numbers = new List([1,3]);
   var result = numbers.zip(new List([2,4,6]));
   expect(result.isEqual(new List([1,2,3,4,6]))).to.be(true);
});

it("Given list with numbers when call skip method then Ignores the specified number of items and returns a sequence starting at the item after the last skipped item (if any)", function(){
   var numbers = new List([1,2,3,4,5,6,7,8]);
   var result = numbers.skip(3);
   expect(result.isEqual(new List([4,5,6,7,8]))).to.be(true);
});

it("Given list with numbers when call apply condition with fluent api", function(){
   var result = new List([1,2,4,3,5,3,7,9])
                    .where(function(x){ return x > 1})
                    .where(function(x){ return x < 5});
    expect(result.isEqual(new List([2,4,3,3]))).to.be(true);
});

describe(".orderBy()", function(){
   it("Given list with numbers when call orderAscending method then returns an list ordered", function(){
      var numbers = new List([{number:5, letra:'e'},{number:3, letra:'q'},{number:1, letra:'a'},{number:9, letra:'w'},{number:4, letra:'r'},{number:7, letra:'t'}]);
      var result = numbers.orderBy(function(x, y){
         return (x.number - y.number);
});
    expect(result.isEqual(new List([{number:1, letra:'a'},{number:3, letra:'q'},{number:4, letra:'r'},{number:5, letra:'e'},{number:7, letra:'t'},{number:9, letra:'w'}])))
.to.be(true);
    });
});

New Song in my live

While I´m developing my new breakable toy LinqJS I´m listening to Tritonal - Anchor (Noisestorm Remix)

Cuando el trabajo se convierte en hobby

Muchas veces pienso que tengo suerte, porque mi trabajo me gusta y además me pagan por ello. No solo eso si no que también es un de mis hobbies.
Cuando llega el domingo por la tarde mucha gente se deprime porque tiene que ir a trabajar al día siguiente, pero personalmente no me siento así. Al igual que cuando me levanto por las mañanas.