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I have a large text template which needs tokenized sections replaced by other text. The tokens look something like this: ##USERNAME##. My first instinct is just to use String.Replace(), but is there a better, more efficient way or is Replace() already optimized for this?
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We might easily apply the same replacement to multiple tokens in a string with the replaceAll method in both Matcher and String. In this tutorial, we'll explore how to apply a different replacement for each token found in a string.
Tokens in every snippet must be properly formatted. A token cannot start in one snippet then end in another. For example, you cannot insert a text that contains only the beginning of a token (e.g., “Hello {”) then append a text with the end of the token (e.g., “USERNAME}.”).
Tokens. Tokens are recognized in text every time a new text is added (by the Append, Replace, InsertBefore, and InsertAfter functions). Positions of tokens are kept in a Dictionary for fast retrieval. That way searching for a text to be replaced takes O(n*log(n) + m) time instead of O(n*m).
Use a Function and Pattern Input We can use a Java Function<Matcher, String> object to allow the caller to provide the logic to process each match. And we can take an input called tokenPattern to find all the tokens: Here, the regular expression is no longer hard-coded.
System.Text.RegularExpressions.Regex.Replace() is what you seek - IF your tokens are odd enough that you need a regex to find them.
Some kind soul did some performance testing, and between Regex.Replace(), String.Replace(), and StringBuilder.Replace(), String.Replace() actually came out on top.
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