=~() 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:
#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:
#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