gistfile1.rb

# right expression, match
str = "12345"
eval = str.match /\A\d+\z/
puts eval ? 'match' : 'no match'
 
# right expression, no match
str = "hello123world"
eval = str.match /\A\d+\z/
puts eval ? 'match' : 'no match'
 
# equivalent? expression, match
str = "12345"
eval = str.match /^\d+$/
puts eval ? 'match' : 'no match'
 
# equivalent? expression, no match
str = "hello123world"
eval = str.match /^\d+$/
puts eval ? 'match' : 'no match'
 
# right expression, no match
str = "
 
12345
 
"
eval = str.match /\A\d+\z/
puts eval ? 'match' : 'no match'
 
# right expression, no match
str = "
 
hello
 
123
 
world"
eval = str.match /\A\d+\z/
puts eval ? 'match' : 'no match'
 
# wrong expression, match
str = "
 
12345
 
"
eval = str.match /^\d+$/
puts eval ? 'match' : 'no match'
 
# wrong expression, match
str = "
 
hello
 
123
 
world"
eval = str.match /^\d+$/
puts eval ? 'match' : 'no match'