NextChar (StringTokenizer function): Difference between revisions
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<td>A string variable to receive the returned character value. </td></tr> | <td>A string variable to receive the returned character value. </td></tr> | ||
<tr><th>%tok</th> | <tr><th>%tok</th> | ||
<td>A StringTokenizer object variable.</td></tr> | <td>A <var>StringTokenizer</var> object variable.</td></tr> | ||
</table> | </table> | ||
==Usage notes== | ==Usage notes== | ||
<ul> | <ul> | ||
<li>If the value of [[AtEnd (StringTokenizer function)|AtEnd]] is <tt>True</tt>, | <li>If the value of [[AtEnd (StringTokenizer function)|AtEnd]] is <tt>True</tt>, | ||
issuing NextChar is invalid and cancels the request. | issuing <var>NextChar</var> is invalid and cancels the request. | ||
<li>Once NextChar executes, the number of the resulting position | <li>Once <var>NextChar</var> executes, the number of the resulting position | ||
can be returned by NextPosition. | can be returned by NextPosition. | ||
<li>The [[PeekChar (StringTokenizer function)|PeekChar]] function also returns the value of the | <li>The [[PeekChar (StringTokenizer function)|PeekChar]] function also returns the value of the | ||
| Line 26: | Line 26: | ||
The following sequence of printText statements display, | The following sequence of printText statements display, | ||
respectively, <tt>E</tt>, <tt>x</tt>, <tt>a</tt>, and <tt>a</tt>, | respectively, <tt>E</tt>, <tt>x</tt>, <tt>a</tt>, and <tt>a</tt>, | ||
showing that the tokenizing position moves after NextChar completes | showing that the tokenizing position moves after <var>NextChar</var> completes | ||
but not after PeekChar completes: | but not after PeekChar completes: | ||
<pre> | <pre> | ||
Revision as of 21:47, 6 February 2011
Value of character at current tokenizing position (StringTokenizer class)
This method returns the value of the character that is at the tokenizing position,
and it advances the tokenizing position past that character to the next character.
The tokenizing position is the value returned by NextPosition.
Syntax
%string = stringTokenizer:NextChar
Syntax terms
| %string | A string variable to receive the returned character value. |
|---|---|
| %tok | A StringTokenizer object variable. |
Usage notes
- If the value of AtEnd is True, issuing NextChar is invalid and cancels the request.
- Once NextChar executes, the number of the resulting position can be returned by NextPosition.
- The PeekChar function also returns the value of the next character, but it does not advance the tokenizing position.
Examples
The following sequence of printText statements display, respectively, E, x, a, and a, showing that the tokenizing position moves after NextChar completes but not after PeekChar completes:
%tok:string = 'Example of peekChar'
Print %tok:nextChar
Print %tok:nextChar
Print %tok:peekChar
Print %tok:peekChar