Explain the concept of the scope of Ruby _ruby topics

The range is everywhere: January to December, 0-9 days, 50 to 67 lines, and so forth. Ruby supports scope and allows us to use a range of ways:

• As a sequence range
• As a condition range
• As an interval range

As a sequence range:

First, it may be the most natural use of the range to express the sequence. The sequence has a starting point, an endpoint and a sequential value in the sequence of methods to produce.

Ruby creates '.. ' And the ' ... ' range of operators use these sequences. The form of these two points establishes an inclusive range, while the form of three points creates a range that does not include the specified high value.

(1..5)    #==> 1, 2, 3, 4, 5
(1...5)    #==> 1, 2, 3, 4
(' a ' ...) d ')  #==> ' A ', ' B ', ' C ', ' d '

Sequence 1. 100 is a reference to a Range object that contains two Fixnum objects. If you want, you can use the To_a method for a series of lists. Try the following example:

#!/usr/bin/ruby

$, = ","  # Array Value separator
range1 = (1..10). To_a
range2 = (' Bar ' ... ') Bat '). To_a

puts "#{range1}"
puts "#{range2}"

This will produce the following results:

1, 2, 3, 4, 5, 6, 7, 8, 9,
Bar, Bas, bat

Scope implementations that can iterate between them and test their content in a variety of ways:

#!/usr/bin/ruby

# Assume a range
digits = 0..9

puts Digits.include? ( 5
ret = digits.min
puts "min value is #{ret}"

ret = Digits.max
puts "max value is #{ret}"

ret = digit S.reject {|i| i < 5}
puts "rejected values are #{ret}"

Digits.each do |digit|
  Puts ' in Loop #{digit} ' end

This will produce the following results:

True
Min value is 0
Max value are 9
rejected values are 5, 6, 7, 8, 9 in
Loop 0 in
Loop 1
in Loop 2 in
Loop 3 in
Loop 4 in loop 5 in
loop 6 in
Loop 7 in
Loop 8 in
Loop 9

As a range of conditions:

Scopes can also be used as conditional expressions. For example, the following code fragment prints a set of lines from standard input, and the first line in each group contains the last line of words beginning and ending:

While gets
  print if/start/... /end/End

Scope can use Case statements:

#!/usr/bin/ruby

score =

score when
  0..40: "Fail" when 41..60: ' Pass ' when
  61..70: "P Ass with Merit ' when
  71..100: ' Pass with distinction '
  Else ' Invalid Score '
end

puts result

This will produce the following results:

Pass with Merit

Interval range:

The last universal range used is for the interval test: Whether a value falls within the interval interval, which is an equality operation using = =.

#!/usr/bin/ruby

if ((1..10) = = 5)
 puts "5 lies in (1..10)" End
if (

(' a '. J ') = = = ' C ')
 puts ' C lies in (' a ' ... ') J ') "
End

if ((' a ')" J ') = = = ' Z ')
 puts ' Z lies in (' a ' ... ') J ') "End

This will produce the following results:

5 lies in (1..10)
C lies in (' a '.. ') J ')