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Examples of String Functions in Ruby
In this article, we will explore some useful string functions in Ruby that are widely used to format data.
Get the Length of the String
To find the length of the string, we will use the size method.
Example
Consider the code shown below.
str = "TutorialsPoint" puts str.size
Output
It will produce the following output.
14
To Check Empty string
To check if a string is empty, we use the size method and comparison operator.
Example
Consider the code shown below.
str = "TutorialsPoint" puts str.size == 0
Output
It will produce the following output.
false
To Extract a Substring from String
To extract a substring from a string, we will use square bracket notation.
Example
Consider the code shown below.
str = "TutorialsPoint" puts str[1,3]
Output
It will produce the following output.
uto
Check if a String Contains a Substring
To check if a string contains a substring, we will use include method.
Example
Consider the code shown below.
str = "TutorialsPoint"
puts str.include?("ials")Output
When we execute this code, it will produce the following output
true
hex Method
In Ruby, hex method is used to treat the leading characters from the given string as a string of hexadecimal digits and the corresponding number. It returns "0" (zero) on error.
Example
Consider the code shown below.
str = "TutorialsPoint" puts str.hex another_str = "12345" puts another_str.hex
Output
It will produce the following output.
0 74565
each_byte Method
In Ruby, the each_byte method is used to pass each byte in a string to the given block, or to return an enumerator if no block is specified.
Example
Consider the code shown below.
str = "TutorialsPoint"
puts str.each_byte{|b| print b, ' ' }
another_str = "TextString"
puts another_str.each_byte{|b| print b, ' ' }Output
It will produce the following output.
84 117 116 111 114 105 97 108 115 80 111 105 110 116 TutorialsPoint 84 101 120 116 83 116 114 105 110 103 TextString
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