New (StringTokenizer constructor): Difference between revisions
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<tr><th>TokenChars= chars</th> | <tr><th>TokenChars= chars</th> | ||
<td>This name required string argument (TokenChars) is a set of single-character token-delimiters (delimiters that are also tokens) that may be separated by whitespace characters. | <td>This name required string argument (TokenChars) is a set of single-character token-delimiters (delimiters that are also tokens) that may be separated by whitespace characters. | ||
TokenChars is an optional argument that defaults to a null string. </td></tr> | |||
<tr><th>Spaces= chars</th> | <tr><th>Spaces= chars</th> | ||
<td>This name required string argument (Spaces) is a set of "whitespace" characters, that is, characters that separate tokens. Each of these characters is a "non-token delimiter," a delimiter that is not itself a token. | <td>This name required string argument (Spaces) is a set of "whitespace" characters, that is, characters that separate tokens. Each of these characters is a "non-token delimiter," a delimiter that is not itself a token. | ||
Spaces is an optional argument that defaults to a blank character. </td></tr> | |||
<tr><th>Quotes= chars</th> | <tr><th>Quotes= chars</th> | ||
<td>This name required string argument (Quotes) is a set of quotation characters. The text between each disjoint pair of identical quotation characters (a "quoted region") is treated as a single token, and any delimiter characters (Quote, Space, or TokenChar) within a quoted region are treated as non-delimiters. | <td>This name required string argument (Quotes) is a set of quotation characters. The text between each disjoint pair of identical quotation characters (a "quoted region") is treated as a single token, and any delimiter characters (Quote, Space, or TokenChar) within a quoted region are treated as non-delimiters. | ||
Quotes is an optional argument that defaults to a null string.</td></tr> | |||
</table> | </table> | ||
==Usage notes== | ==Usage notes== |
Revision as of 18:16, 8 February 2011
Create new StringTokenizer object (StringTokenizer class)
This method returns a new instance of a StringTokenizer object.
It has three optional arguments that let you specify the delimiter characters
that determine the tokens in the string that is being tokenized.
Syntax
%stringTokenizer = [%(StringTokenizer):]New[( [TokenChars= string], - [Spaces= string], - [Quotes= string], - [Separators= string])]
Syntax terms
%tok | A StringTokenizer object variable to contain the new object instance. |
---|---|
TokenChars= chars | This name required string argument (TokenChars) is a set of single-character token-delimiters (delimiters that are also tokens) that may be separated by whitespace characters. TokenChars is an optional argument that defaults to a null string. |
Spaces= chars | This name required string argument (Spaces) is a set of "whitespace" characters, that is, characters that separate tokens. Each of these characters is a "non-token delimiter," a delimiter that is not itself a token. Spaces is an optional argument that defaults to a blank character. |
Quotes= chars | This name required string argument (Quotes) is a set of quotation characters. The text between each disjoint pair of identical quotation characters (a "quoted region") is treated as a single token, and any delimiter characters (Quote, Space, or TokenChar) within a quoted region are treated as non-delimiters. Quotes is an optional argument that defaults to a null string. |
Usage notes
- A character may belong to at most one of the Spaces, Quotes, or TokenChars sets of characters.
- If you are specifying Spaces, Quotes, or TokenChars, each character in the string is a quotation character — that is, you may not separate characters — and no character may repeat (except for apostrophe, which may be doubled).
- A quoted region is not affected by the TokensToLower and TokensToUpper properties.
Examples
In the following request, a variety of delimiters is on display:
begin %tok is object stringtokenizer %tok = new(spaces=' ;', tokenchars='=_', quotes='"') %tok:string = '--=_alternative 0016B5A2CA2574DD_=; - Content-Type: text/plain; charset="US-ASCII"' repeat while not %tok:atEnd printText {~} is {%tok:nextToken} end repeat end
The result is:
%tok:nextToken is -- %tok:nextToken is = %tok:nextToken is _ %tok:nextToken is alternative %tok:nextToken is 0016B5A2CA2574DD %tok:nextToken is _ %tok:nextToken is = %tok:nextToken is Content-Type: %tok:nextToken is text/plain %tok:nextToken is charset %tok:nextToken is = %tok:nextToken is US-ASCII