learn_ruby_ch3_pt2

Question 1

Ternary operator (argument, arguments)

Answer 1

label = length == 1 ? “ argument” : “ arguments”

Question 2

case statement

lang = “fr”

Answer 2

lang = “fr”

dog = case lang
  when "en"
     "dog"
  when "es"
     "perro"
  when "fr"
     "chien"
  else
     "dog"
end

colon form no longer supported starting in 1.9, e.g.,
when “en”: “dog”

Question 3

while array loop (breeds)

Answer 3

i = 0
breeds = [ “quarter”, “arabian”, “appalosa”, “paint” ]
puts breeds.size # => 4
temp = []

while i < breeds.size do
temp &laquo_space;breeds[i].capitalize
i +=1
end

temp.sort! # => [“Appalosa”, “Arabian”, “Paint”, “Quarter”]
breeds.replace( temp )
p breeds # => [“Appalosa”, “Arabian”, “Paint”, “Quarter”]

The “do” is optional

Question 4

begin while loop (temp)

Answer 4

temp = 98.3

begin
print “Temp is “ + temp.to_s + “ Fahrenheit. “
temp += 0.1
end while temp < 98.6

Question 5

while with break (breeds)

Answer 5

i = 0
breeds = [ "quarter", "arabian", "appalosa", "paint" ]
temp = []

while i < breeds.size
  temp << breeds[i].capitalize
  break if temp[i] == "Arabian"
  i +=1
end

p temp # => [“Quarter”, “Arabian”]