LNA

# Method should do just one thing at a time
# How can we flag methods that are doing more than one thing?
# Words like and & or should never be in a method.  These words indicate that 
# the method is doing more than one thing.

# bad

def bake_and_eat(cookies)
  cookies.bake
  cookies.eat

LNA

students = YogaStudent.find(:all, :limit => 10)
# will return an array with 10 random yoga student records

ashtanga_students = students.select { |student| student[:xml].match(/ashtanga/) }
# will look only at the xml keys to match ashtanga in the values.

LNA

select distinct(column_name) from table_name order by column_name ASC;

LNA

; The big change in logic happens at 5. You can use nested if statements to solve the kata up to 5.  
; After that, its best to define the roman numerals and their numbers in pairs, and pull from that.

(def pairs [[10 "X"][9 "IX"][5 "V"] [4 "IV"] [1 "I"]])

(defn roman [n]
  (loop [n      n
         result ""
         pairs  pairs]
    (if (< n 1)

LNA

(mapcat [1 2 3] [4 5 6])
  => Gives an error.  Mapcat wants a function and a coll, not two colls.

(maptcat str [4 5 6])
  => Gives (\4 \5 \6).  It applies the function its given to the coll its given.  Then it concats the result.  
  (concat [4 5 6]) gives [4 5 6].  So really, mapcat is a great shortcut for accomplishing two things at once.

LNA

(concat [1 2 3] 4)
  => gives an error.  Remember, concat wants to squish together 2 differnt collections of data.

(conj [1 2 3] 4)
  => gives [1 2 3 4].  Sucessfully adds an item to a collection.  Added it to the end because the coll is a vector.
    



(concat [1 2 3] [4])

LNA

 private class CarBuilder {
        private int year;
        private String make;

        public CarBuilder setYear(int year) {
            this.year = year;
            return this;
        }

        public CarBuilder setMake(String make) {

LNA

{"assignments":[{"slug":"robot-name","track":"clojure","files":{"robot.clj":"(ns robot)\r\n\r\n(def num-letters 26)\r\n\r\n(def name-seed\r\n  (atom [0 0]))\r\n\r\n(defn- inc-name-seed\r\n  []\r\n  (swap! name-seed\r\n         (fn [[letter number]]\r\n           (if (\u003e= number 999)\r\n             [(inc letter) 0]\r\n             [letter (inc number)]))))\r\n\r\n(defn- letter-at\r\n  [n]\r\n  (char (+ n (int \\A))))\r\n\r\n(defn- generate-name\r\n  []\r\n  (let [[letter number] @name-seed\r\n        result (str (letter-at (quot number num-letters))\r\n                    (letter-at (mod number num-letters))\r\n                    (format \"%03d\" number))]\r\n    (inc-name-seed)\r\n    result))\r\n\r\n(defn robot\r\n  []\r\n  (atom (generate-name)))\r\n\r\n(defn robot-name\r\n  [robot]\r\n  @robot)\r\n\r\n(defn reset-name\r\n  [robot]\r\n  (reset! robot (generate-name)))\r"}},{"slug":"scrabble-score","track":"go","files":{"scrabble_score.go":"package scrabble_score\n\nimport \"unicode\"\n\nvar scores = m

LNA

 
 public class FileRouter implements iResponse {
// omitted code 
 @Override
    public byte[] buildResponseBody(Map<String, String> request) throws IOException {
        String fileOneString = request.get("DIRECTORY") + request.get("URI");
        Path file = Paths.get(fileOneString);
        byte[] body      = Files.readAllBytes(filePath);
        return body;
    }

LNA

GET /logs HTTP/1.1
Authorization: Basic YWRtaW46aHVudGVyMg==
Connection: close
Host: localhost:5000


The request: {Type=GET}