honore-beaugrand/Cours numero 3.ipynb

Class 3. keep going

The homework was way too hard!!

We needed some more tools...

The concat function is used to concatenate collections togheter.

Homework correction (Part 1)

In [6]:

(def school-url "https://gitlab.com/didiercrunch/honore-beaugrand/raw/master/resources/data/homework2/classes.edn")
(def school-data (read-string (slurp school-url)))

school-data

Out [6]:

[{:name "class 1", :url "https://gitlab.com/didiercrunch/honore-beaugrand/raw/master/resources/data/homework2/class1.edn"} {:name "class 2", :url "https://gitlab.com/didiercrunch/honore-beaugrand/raw/master/resources/data/homework2/class2.edn"} {:name "class 3", :url "https://gitlab.com/didiercrunch/honore-beaugrand/raw/master/resources/data/homework2/class3.edn"}]

In [12]:

(def class-urls (map :url school-data))
(def class-data-raw (map slurp class-urls))
(def class-data (map read-string class-data-raw))
class-data

Out [12]:

([{:name "boris", :sex :male, :age 22} {:name "bob", :sex :female, :age 25} {:name "andrea", :sex :male, :age 33} {:name "stephanie", :sex :female, :age 12} {:name "alexa", :sex :female, :age 90} {:name "boris", :sex :female, :age 12} {:name "nathasha", :sex :male, :age 32} {:name "marco", :sex :male, :age 30}] [{:name "enrico", :sex :male, :age 32} {:name "raquel", :sex :female, :age 15} {:name "alfred", :sex :male, :age 17} {:name "kery", :sex :female, :age 101} {:name "alexa", :sex :female, :age 43} {:name "dominique", :sex :female, :age 30} {:name "sofia", :sex :male, :age 33} {:name "clory", :sex :male, :age 45}] [{:name "Scot", :sex :male, :age 23} {:name "Annmarie", :sex :female, :age 15} {:name "Jeremy", :sex :male, :age 17} {:name "Theodora", :sex :female, :age 67} {:name "Andria", :sex :female, :age 45} {:name "Kyoko", :sex :female, :age 39} {:name "Jeanine", :sex :male, :age 41} {:name "Jeanine", :sex :male, :age 45}])

In [28]:

(def number-of-student-by-class (map count class-data))
(def number-of-student-in-the-school (apply + number-of-student-by-class))
(println "The total number of student in the school is:" number-of-student-in-the-school)

The total number of student in the school is: 24

In [32]:

(def all-student (apply concat class-data))

Out [32]:

#'user/all-student

In [29]:

(def all-ages (map :age all-student))

(def youger-age (apply min all-ages))
(def older-age (apply max all-ages))

(println "The youngest person is aged " youger-age)
(println "The oldest person is aged " older-age)

The youngest person is aged  12
The oldest person is aged  101

In [34]:

(def sum-of-all-ages (apply + all-ages))
(def average-age (/ sum-of-all-ages number-of-student-in-the-school))
(println "the average age is " (double average-age))

the average age is  36.0