'''string wordstart''' ''string charIndex''

Returns the index of the first character in the word containing character ''charIndex'' of ''string''. ''charIndex'' may be specified as for the '''index''' method. 
A word is considered to be any contiguous range of alphanumeric (Unicode letters or decimal digits) or underscore (Unicode connector punctuation) characters, or any single character other than these.

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See also:

   * [string]
   * [string index]
   * [string wordend]

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