TECH601-00 - Day 2 Example Code with output

array.rb

a = []

# look at "a" default value
puts a

# look at "a" converted to string
puts a.to_s
puts "#{a}"

# new list with things in it
b = [1, 2, 3]

# look at "b" default value
puts b

# look at "b" converted to string
puts b.to_s

array_output.txt

[]
[]
1
2
3
[1, 2, 3]

string_manipulation.rb

# assign some variables
a = 1
b = 2
c = a + b

# print output without newlines
print "The answer is: "
print c
print "\n"

# puts a
# puts b

# display the answer with newlines
puts "The answer is: "
puts c
# puts "\n"

# display the answer on one line, using `puts` and `+` - "concatenation"
puts "The answer is: " + c.to_s

# student example
print "The answer is: "
puts c

# solve using "interpolation"
puts "The answer is: #{c}"

# interpolation with evaluation
puts "The answer to #{a} + #{b} is: #{a + b}"
puts "The answer to #{a} + #{b} is: #{c}"

# concatenated version - looooooonghand :)
puts "The answer to " + a.to_s + " + " + b.to_s + " is: " + c.to_s

# "broken" interpolation
puts 'The answer to #{a} + #{b} is: #{c}'

# single/double quote fun!
puts 'This has "double quotes" in it'
puts "This has 'single quotes' in it"

puts "Interpolate #{"a string"} in here"
a_string = "a string"
puts "Interpolate #{a_string} in here"

# escape quotes
puts 'This has a \'single quoted string\' inside \n'
puts "This has a \"double quoted string\" inside \n"

# alternate string syntax - percent plus delimeter
puts %(This string has "double" and 'single' quotes \n)
puts %(This #{a_string} has "double" and 'single' quotes \n)
puts %|This string has "double" and 'single' quotes \n|
puts %[This string has "double" and 'single' quotes \n]
puts %.This string has "double" and 'single' quotes \n.

string_manipulation_output.txt

The answer is: 3
The answer is: 
3
The answer is: 3
The answer is: 3
The answer is: 3
The answer to 1 + 2 is: 3
The answer to 1 + 2 is: 3
The answer to 1 + 2 is: 3
The answer to #{a} + #{b} is: #{c}
This has "double quotes" in it
This has 'single quotes' in it
Interpolate a string in here
Interpolate a string in here
This has a 'single quoted string' inside \n
This has a "double quoted string" inside 
This string has "double" and 'single' quotes 
This a string has "double" and 'single' quotes 
This string has "double" and 'single' quotes 
This string has "double" and 'single' quotes 
This string has "double" and 'single' quotes