Ruby | String =~ Method

=~() is a String class method in Ruby which is used for matching purpose. If the given object is a Regexp, then this method will use it as a pattern to match against the given string.

Syntax: str =~ obj

Parameters: Here, str is the given string and obj is the object to be matched.



Returns: The position of the match starts or nil if there is no match.

Example 1:

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#ruby 2.3.1 
     
# Ruby program to demonstrate
# the =~ method
     
# Taking a string and
# using the method
puts "ayucd7845ef" =~ /\d/
  
#returns nil for this
puts "String" =~ 77

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Output:

5

Example 2:

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#ruby 2.3.1 
     
# Ruby program to demonstrate
# the =~ method
     
# Taking a string and
# using the method
puts "952364127" =~ /\d/
  
puts "String123" =~ /\d/

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Output:

0
6


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