Glossary

Question 1

# Array.new constructor
variable = \_\_\_\_(some_array)

Answer 1

Array.new

Question 2

# Array.new constructor
variable = \_\_\_\_(some_array)

Answer 2

Array.new

Question 3

\_\_\_\_ do |arg|
  # Do something to each element, referenced as arg
end

Answer 3

array.each

Question 4

array.each ___ |arg|
# Do something to each element, referenced as arg
end

Answer 4

do

Question 5

array.each do \_\_\_\_
  # Do something to each element, referenced as arg
end

Answer 5

|arg|

Question 6

array.each do |arg|
  # Do something to each element, referenced as arg
\_\_\_\_

Answer 6

end

Question 7

[[1,2,3], [4,5,6], 7, [[8,9], 10]].____

=> [1,2,3,4,5,6,7,8,9,10]

Answer 7

flatten

Question 8

[1,1,1,2,3,4,3,3].___

=> [1,2,3,4]

Answer 8

uniq

Question 9

# Blocks that span only one line usually use the braces form
objs.\_\_\_ { |obj| do_something }

Answer 9

method

Question 10

# Blocks that span only one line usually use the braces form
objs.method {\_\_\_ do_something }

Answer 10

|obj|

Question 11

# Blocks that span only one line usually use the braces form
objs.method \_\_ |obj| do_something \_\_

Answer 11

{ }

Question 12

objs.method \_\_\_ |obj|
  # do first line
  # do second line
  # ...
  # do nth line
end

Answer 12

do

Question 13

objs.method do \_\_\_
  # do first line
  # do second line
  # ...
  # do nth line
end

Answer 13

|obj|

Question 14

objs.method do |obj|
  # do first line
  # do second line
  # ...
  # do nth line
\_\_\_

Answer 14

end

Question 15

x __y // returns true if two things are equal

Answer 15

==

Question 16

x__y // returns true if two things are not equal

Answer 16

!=

Question 17

x __ y // returns true if x is less than or equal to y

Question 18

x __ y // returns true if x is greater than or equal to y

Answer 18

> =

Question 19

__
comment line
comment line
=end

Answer 19

=begin

Question 20

=begin
comment line
comment line
__

Answer 20

=end

Question 21

empty_hash = Hash.new
=> {}

my_hash = Hash.new(“The Default”)
my_hash[“random_key”]
=>__

Answer 21

“The Default”

Question 22

empty_hash = Hash.new
=> {}

my_hash = Hash.new(“The Default”)
my_hash[“random_key”]
=>__

Answer 22

“The Default”

Question 23

\_\_\_\_ do |arg|
  # Do something to each element, referenced as arg
end

Answer 23

array.each

Question 24

array.each ___ |arg|
# Do something to each element, referenced as arg
end

Answer 24

do

Question 25

array.each do \_\_\_\_
  # Do something to each element, referenced as arg
end

Answer 25

|arg|

Question 26

array.each do |arg|
  # Do something to each element, referenced as arg
\_\_\_\_

Answer 26

end

Question 27

[[1,2,3], [4,5,6], 7, [[8,9], 10]].____

=> [1,2,3,4,5,6,7,8,9,10]

Answer 27

flatten

Question 28

[1,1,1,2,3,4,3,3].___

=> [1,2,3,4]

Answer 28

uniq

Question 29

# Blocks that span only one line usually use the braces form
objs.\_\_\_ { |obj| do_something }

Answer 29

method

Question 30

# Blocks that span only one line usually use the braces form
objs.method {\_\_\_ do_something }

Answer 30

|obj|

Question 31

# Blocks that span only one line usually use the braces form
objs.method \_\_ |obj| do_something \_\_

Answer 31

{ }

Question 32

objs.method \_\_\_ |obj|
  # do first line
  # do second line
  # ...
  # do nth line
end

Answer 32

do

Question 33

objs.method do \_\_\_
  # do first line
  # do second line
  # ...
  # do nth line
end

Answer 33

|obj|

Question 34

objs.method do |obj|
  # do first line
  # do second line
  # ...
  # do nth line
\_\_\_

Answer 34

end

Question 35

x __y // returns true if two things are equal

Answer 35

==

Question 36

x__y // returns true if two things are not equal

Answer 36

!=

Question 37

x __ y // returns true if x is less than or equal to y

Question 38

x __ y // returns true if x is greater than or equal to y

Answer 38

> =

Question 39

__
comment line
comment line
=end

Answer 39

=begin

Question 40

=begin
comment line
comment line
__

Answer 40

=end

Question 41

# Hash.new constructor
my_hash = \_\_\_([default_value])

Answer 41

Hash.new

Question 42

empty_hash = Hash.new
=> {}

my_hash = Hash.new(“The Default”)
my_hash[“random_key”]
=>__

Answer 42

“The Default”

Question 43

# Hash literal notation
my_hash = {
  \_\_ => value1,
  :key2  => value2,
  3 => value 3
}

Answer 43

“key1”

Question 44

# Hash literal notation
my_hash = {
  "key1" => value1,
  :key2  => value2,
  3 => value 3
}

Answer 44

:key2

Question 45

# Hash literal notation
my_hash = {
  "key1" => value1,
  :key2  => value2,
  \_\_ => value 3
}

Answer 45

3

Question 46

my_hash = {
__
}

Answer 46

key1: value1,
key2: value2

Question 47

if ___
puts “I get printed!”
end

I get printed!

Answer 47

true

Question 48

___ false
puts “I get printed!”
end

I get printed!

Answer 48

unless

Question 49

x = 5
if x > 5
  print "I am big!"
\_\_\_ x == 5
  print "I am medium!"
else
  print "I am small!"
end

I am medium!

Answer 49

elsif

Question 50

x = 5
if x > 5
  print "I am big!"
elsif x == 5
  print "I am medium!"
\_\_\_
  print "I am small!"
end

I am medium!

Answer 50

else

Question 51

i = 1

___ i

Answer 51

while

Question 52

counter = 3

___ counter

Answer 52

until

Question 53

__ number in (0..5)
puts number
end

0
1
2
3
4
5

Answer 53

for

Question 54

for number __ (0..5)
puts number
end

0
1
2
3
4
5

Answer 54

in

Question 55

my_array = [“Matz”, “chunky”, “bacon”]
for item in __
puts item
end

Matz
chunky
bacon

Answer 55

my_array

Question 56

10 __ 3

=> 1

Answer 56

%

Question 57

9.99.___

=> 9

Answer 57

floor

Question 58

45.4.___
=> 46

(4 - 1.9).___
=> 3

Answer 58

ceil

Question 59

__

=> 3.14159265358979

Answer 59

Math::PI

Question 60

___(100)
=> 10.0

___(5+4)
=> 3.0

Answer 60

Math.sqrt

Question 61

___ sum(x,y)
x + y
end

sum(13, 379)
=> 392

Answer 61

def

Question 62

3.times { ___ “Hello!” }

Hello!Hello!Hello!

Answer 62

print

Question 63

3.times { ___ “Hello!” }
Hello!
Hello!
Hello!

Answer 63

puts

Question 64

a = ["4"]
\_\_\_ a
when 1..4, 5
  puts "It's between 1 and 5"
when 6
  puts "It's 6"
when String
  puts "You passed a string"
else
  puts "You gave me #{a} -- I have no idea what to do with that."
end

=> You gave me 4 – I have no idea what to do with that.

Answer 64

case

Question 65

a = ["4"]
case a
\_\_\_ 1..4, 5
  puts "It's between 1 and 5"
\_\_\_ 6
  puts "It's 6"
\_\_\_ String
  puts "You passed a string"
else
  puts "You gave me #{a} -- I have no idea what to do with that."
end

=> You gave me 4 – I have no idea what to do with that.

Answer 65

when

Question 66

a = ["4"]
case a
when 1..4, 5
  puts "It's between 1 and 5"
when 6
  puts "It's 6"
when String
  puts "You passed a string"
\_\_\_
  puts "You gave me #{a} -- I have no idea what to do with that."
end

=> You gave me 4 – I have no idea what to do with that.

Answer 66

else

Question 67

grade = 88
status = grade >= 70 ___ “pass” : “fail”
=> pass

Answer 67

?

Question 68

grade = 88
status = grade >= 70 ? “pass”___ “fail”
=> pass

Answer 68

:

Question 69

ne_to_ten = (1..10).to_a
one_to_ten.___ do |num|
print (num**2).to_s + “ “
end

1 4 9 16 25 36 49 64 81 100

Answer 69

each

Question 70

ne_to_ten = (1..10).to_a
one_to_ten.each ___ |num|
print (num**2).to_s + “ “
end

1 4 9 16 25 36 49 64 81 100

Answer 70

do

Question 71

3.____ do
puts “I’m in the loop!”
end
puts “I’m out the loop!”

Answer 71

times

Question 72

3.times ____
puts “I’m in the loop!”
end
puts “I’m out the loop!”

Answer 72

do

Question 73

空のハッシュを作成

scores = ____

Answer 73

{}

Question 74

# キー"Alice"、値80のペアを追加
scores\_\_\_\_ = 80

Answer 74

[“Alice”]

Question 75

# キー"Alice"、値80のペアを追加
scores["Alice"] \_\_\_

Answer 75

= 80

Question 76

# キー"Alice"の値を取り出し
p scores\_\_\_\_

Answer 76

[“Alice”]

Question 77

# 3つのキー(name, email, address)＋値からなるハッシュを作成
user = { \_\_\_ => "k-sato", \_\_\_ => "k-sato@foo.xx.jp",
         \_\_\_ => "Tokyo" }

Answer 77

:name :email :address

Question 78

# キー:nameの値を取り出し
p user\_\_\_

Answer 78

[:name]