Class: Text Iterator

This class can be used to iteration over a text string for external arbitrary processing.

It traverses a given text string and find all characters that match a given pattern of characters.

The strings of consecutive characters that match the pattern are passed to a given callback function for arbitrary processing.

The patterns of characters to match can be given as an array of characters strings, or a string that specifies that the match of characters in lower case, upper case, numeric, alphanumeric with lower or upper case, or all characters.

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