Web Reference: If replacement is a string, that string determines the replacing string that is substituted for the matched text. Each of the examples above uses a simple string as the replacing string. Dec 9, 2019 ยท insert is a String class method in Ruby which is used to inserts the specified string before the character at the given index, modifying the given one. Negative indices count from the end of the string, and insert after the given character. The examples in this section mostly use the String#sub and String#gsub methods; the principles illustrated apply to all four substitution methods.
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