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<span style="font-size:120%; color:black"><b><section begin=dpl_desc/>Return number of matchi<section end=dpl_desc/></b></span>
{{Template:GenericNamedArraylist:FindNextItemNumber subtitle}}
[[Category:NamedArraylist methods|FindNextItemNumber function]]
<!--DPL?? Category:NamedArraylist methods|FindNextItemNumber function: Return number of matchi-->
<p>
FindNextItemNumber is a member of the [[NamedArraylist class]].
</p>


This function searches &ldquo;forward&rdquo; in the NamedArraylist to find and return
<var>FindNextItemNumber</var> searches "forward" in a <var>[[FloatNamedArraylist class|FloatNamedArraylist]]</var>, <var>[[NamedArraylist class|NamedArraylist]]</var>, or <var>[[UnicodeNamedArraylist class|UnicodeNamedArraylist]]</var> to find and return the item number of the next item that matches a specified criterion. The criterion is supplied by the [[SelectionCriterion class|SelectionCriterion]] object that is a required <var>FindNextItemNumber</var> parameter. If no item satisfies the criterion, the method returns a zero.
the item number of the next item that matches a specified criterion.
The criterion is supplied by the [[SelectionCriterion class|SelectionCriterion]] object
that is a required FindNextItemNumber parameter.
If no item satisfies the criterion, the method returns a zero.


FindNextItemNumber is available in ''Sirius Mods'' version 7.6 and later.
==Syntax==
==Syntax==
  %itemnum = %namrayl:FindNextItemNumber(criterion        -
{{Template:GenericNamedArraylist:FindNextItemNumber syntax}}
                                          [,&nbsp;Start=itemnum])
===Syntax terms===
===Syntax Terms===
<table class="syntaxTable">
<dl>
<tr><th>%number</th>
<dt><i>%itemnum</i>
<td>A numeric variable to contain the item number of the item that is located by the search. </td></tr>
<dd>A numeric variable to contain the item number of the
<tr><th>anyNal</th>
item that is located by the search.
<td>The <var>FloatNamedArraylist</var>, <var>NamedArraylist</var> or <var>UnicodeNamedArraylist</var> method object. </td></tr>
<dt><i>%namrayl</i>
<tr><th>selectionCriterion</th>
<dd>A NamedArraylist object.
<td>A <var>SelectionCriterion</var> object, which is a relational expression that is applied to a <var class="term">anyNal</var> item value to determine whether the value satisfies the expression. The expression consists of a function, an operator, and a numeric or string value.
<dt><i>criterion</i>
<p>For example, <code>GT(this, 11)</code> is the criterion <code>this > 11</code>, where <var>This</var> is an identity function value that simply returns the item's value. The item number of the first item tested by <var>FindNextItemNumber</var> that satisfies this expression is the method's return value.</p>
<dd>A SelectionCriterion object, which is a relational expression that is
<p>The function in the criterion is a method value (a method or class member name literal, or a method variable) for a method that operates on items of the type specified on the <var class="term">anyNal</var> declaration and that returns a numeric or string value. This is described further in [[SelectionCriterion class#Specifying a SelectionCriterion's parameters|"Specifying a SelectionCriterion's parameters"]].</p> </td></tr>
applied to a ''%namrayl'' item value to determine
<tr><th><var>Start</var></th>
whether the value satisfies the expression.
<td>The <var class="term">number</var> of the item <b><i>after</i></b> which to begin the search. If the value of <var>Start</var> is 2, item 3 is the first item considered. The value of <var>Start</var> may be 0 through the number of items in the <var>FloatNamedArraylist</var>, <var>NamedArraylist</var> or <var>UnicodeNamedArraylist</var>. For an array list of three items, <var class="term">number</var> may be 0, 1, 2, or 3.
The expression consists of a function, an operator, and a numeric or string value.
<p>This is an optional, [[Methods#Named parameters|name required]], argument which defaults to 0. If you specify a value, the parameter name <var>Start</var> is required.</p></td></tr>
</table>
 
==Usage notes==
<ul>
<li>If the value of <var>Start</var> is greater than the number of items in the <var>FloatNamedArraylist</var>, <var>NamedArraylist</var> or <var>UnicodeNamedArraylist</var>, the request is cancelled.  If the value of <var>Start</var> is equal to the number of items, then <var>FindNextItemNumber</var> returns a zero.
<li><var>FindNextItemNumber</var> is available in <var class="product">[[Sirius Mods|Sirius Mods]]</var> Version 7.6 and later.
</ul>
 
==Examples==
<ol><li>In the following fragment, two <var>FindNextItemNumber</var> calls and one <var>[[FindPreviousItemNumber_(GenericNamedArraylist_function)|FindPreviousItemNumber]]</var> call are applied to a collection of objects of the <code>staff</code> class that is defined in the request in the [[FindNextItem (GenericNamedArraylist function)#Examples|"FindNextItem Examples"]] section:
<p class="code">%old is namedArraylist of object staff
%old = new
%old('Jim') = newf('Red', 'employed')
%old('Jed') = newf('Black', 'retired')
%old('Jan') = newf('Green', 'employed')
%old('Jud') = newf('Brown', 'retired')
%old('Jon') = newf('White', 'retired')


For example, <tt>GT(this, 11)</tt> is the
%sel1 is object selectioncriterion for object staff
criterion <tt>this</tt> <tt>></tt> <tt>11</tt>, where
%sel2 is object selectioncriterion for object staff
<tt>this</tt> is an identity function that simply returns the item's value.
%n is float
The item number of the first item tested by FindNextItemNumber that satisfies
%sel1 = gt(name, 'Mud')
this expression is the method's return value.
%sel2 = and(gt(name, 'Mud'), eq(status, 'retired'))


The function in the criterion is
%n = %old:findNextItemNumber(%sel1, start=1)
a method value (a method or class member name literal, or a method variable)
print %old:nameByNumber(%n)
for a method
that operates on items of the type specified on the ''%namrayl''
declaration and that returns a numeric or string value.
This is described further in "[[SelectionCriterion class#Specifying a SelectionCriterion's parameters|Specifying a SelectionCriterion's parameters]]".
<dt><b>Start=</b><i> itemnum</i>
<dd>The number of the item ''after'' which to begin the search.
If the ''itemnum'' value of Start is 2, item 3 is the first item considered.
The value of Start may be 0 through the number of items in the NamedArraylist.
For a NamedArraylist of three items, ''itemnum'' may be 0, 1, 2, or 3.


This is an optional argument, and it defaults to 0.
%n = %old:findNextItemNumber(%sel2)
If you specify a value, the parameter name <tt>Start</tt> is required.
print %old:nameByNumber(%n)


</dl>
%n = %old:findPreviousItemNumber(lt(name, 'Mud'), start=%n)
==Usage Notes==
print %old:nameByNumber(%n)
<ul>
</p>
<li>If the value of Start is greater than the number of items in the NamedArraylist,
 
the request is cancelled.
The result is:
If the value of Start is equal to the number of items, FindNextItemNumber
<p class="output">Jim
returns a zero.
Jon
<li>The [[FindPreviousItemNumber (NamedArraylist function)|FindPreviousItemNumber]] functional is identical
Jed
to FindNextItemNumber except that it searches backward in the NamedArraylist.
</p>
</ul>
 
==Examples==
<li>The following request contains two <var>FindNextItemNumber</var> calls and one
<var>FindPreviousItemNumber</var> call:
<p class="code">begin


In the following fragment, two FindNextItemNumber calls and one
%is unicodeNamedArraylist of longstring
FindPreviousItemNumber call are applied to a collection
%k = new
of objects of the <tt>staff</tt> class that is defined in the
%k('&amp;sect;Jan':u) = 'Orion'
request in "[[FindPreviousItem (NamedArrayArraylist function)#Examples|NamedArrayArraylist FindPreviousItem function example]]":
%k('&amp;sect;Apr':u) = 'Leo'
<pre style="xmp">
%k('&amp;sect;Mar':u) = 'Cancer'
    %old is namedArraylist of object staff
%k('&amp;sect;Jun':u) = 'Ursa Minor'
    %old = new
%k('&amp;sect;Nov':u) = 'Andromeda'
    %old('Jim') = newf('Red', 'employed')
%k('&amp;sect;Dec':u) = 'Aries'
    %old('Jed') = newf('Black', 'retired')
%k('&amp;sect;Feb':u) = 'Canis Major'
    %old('Jan') = newf('Green', 'employed')
    %old('Jud') = newf('Brown', 'retired')
    %old('Jon') = newf('White', 'retired')


    %sel1 is object selectioncriterion for float
%sel is object selectionCriterion for longstring
    %sel2 is object selectioncriterion for float
%n is float
    %n is float
%sel = LT(this, 'C')
    %sel1 = GT(name, 'Mud')
    %sel2 = AND(GT(name, 'Mud'), EQ(status, 'retired'))


    %n = %old:FindNextItemNumber(%sel1, start=1)
%n = %k:findNextitemNumber(%sel)
    Print %old:nameByNumber(%n)
print %k:nameByNumber(%n)


    %n = %old:FindNextItemNumber(%sel2)
%n = %k:findNextItemNumber(%sel, start=%n)
    Print %old:nameByNumber(%n)
print %k:nameByNumber(%n)


    %n = %old:FindPreviousItemNumber(LT(name, 'Mud'), -
%n = %k:findPreviousItemNumber(EQ(this, 'Leo'), start=%n)
                                    start=%n)
print %k:nameByNumber(%n)
    Print %old:nameByNumber(%n)
 
</pre>
end
</p>


The result is:
The result is:
<pre style="xmp">
<p class="code">&sect;Dec
    Jim
&sect;Nov
    Jon
&sect;Apr
    Jan
</p>
</pre>
 
</ol>
 
==See also==
<ul><li><var>[[FindPreviousItemNumber_(GenericNamedArraylist_function)|FindPreviousItemNumber]]</var> is identical to <var>FindNextItemNumber</var> except that it searches backward in the <var>FloatNamedArraylist</var>, <var>NamedArraylist</var> or <var>UnicodeNamedArraylist</var>.</ul>
{{Template:GenericNamedArraylist:FindNextItemNumber footer}}

Latest revision as of 21:16, 7 August 2012

Item number of next item that matches some selection criteria (FloatNamedArraylist, NamedArraylist, and UnicodeNamedArraylist classes)


FindNextItemNumber searches "forward" in a FloatNamedArraylist, NamedArraylist, or UnicodeNamedArraylist to find and return the item number of the next item that matches a specified criterion. The criterion is supplied by the SelectionCriterion object that is a required FindNextItemNumber parameter. If no item satisfies the criterion, the method returns a zero.

Syntax

%number = anyNal:FindNextItemNumber( selectionCriterion, [Start= number])

Syntax terms

%number A numeric variable to contain the item number of the item that is located by the search.
anyNal The FloatNamedArraylist, NamedArraylist or UnicodeNamedArraylist method object.
selectionCriterion A SelectionCriterion object, which is a relational expression that is applied to a anyNal item value to determine whether the value satisfies the expression. The expression consists of a function, an operator, and a numeric or string value.

For example, GT(this, 11) is the criterion this > 11, where This is an identity function value that simply returns the item's value. The item number of the first item tested by FindNextItemNumber that satisfies this expression is the method's return value.

The function in the criterion is a method value (a method or class member name literal, or a method variable) for a method that operates on items of the type specified on the anyNal declaration and that returns a numeric or string value. This is described further in "Specifying a SelectionCriterion's parameters".

Start The number of the item after which to begin the search. If the value of Start is 2, item 3 is the first item considered. The value of Start may be 0 through the number of items in the FloatNamedArraylist, NamedArraylist or UnicodeNamedArraylist. For an array list of three items, number may be 0, 1, 2, or 3.

This is an optional, name required, argument which defaults to 0. If you specify a value, the parameter name Start is required.

Usage notes

  • If the value of Start is greater than the number of items in the FloatNamedArraylist, NamedArraylist or UnicodeNamedArraylist, the request is cancelled. If the value of Start is equal to the number of items, then FindNextItemNumber returns a zero.
  • FindNextItemNumber is available in Sirius Mods Version 7.6 and later.

Examples

  1. In the following fragment, two FindNextItemNumber calls and one FindPreviousItemNumber call are applied to a collection of objects of the staff class that is defined in the request in the "FindNextItem Examples" section:

    %old is namedArraylist of object staff %old = new %old('Jim') = newf('Red', 'employed') %old('Jed') = newf('Black', 'retired') %old('Jan') = newf('Green', 'employed') %old('Jud') = newf('Brown', 'retired') %old('Jon') = newf('White', 'retired') %sel1 is object selectioncriterion for object staff %sel2 is object selectioncriterion for object staff %n is float %sel1 = gt(name, 'Mud') %sel2 = and(gt(name, 'Mud'), eq(status, 'retired')) %n = %old:findNextItemNumber(%sel1, start=1) print %old:nameByNumber(%n) %n = %old:findNextItemNumber(%sel2) print %old:nameByNumber(%n) %n = %old:findPreviousItemNumber(lt(name, 'Mud'), start=%n) print %old:nameByNumber(%n)

    The result is:

    Jim Jon Jed

  2. The following request contains two FindNextItemNumber calls and one FindPreviousItemNumber call:

    begin %k is unicodeNamedArraylist of longstring %k = new %k('&sect;Jan':u) = 'Orion' %k('&sect;Apr':u) = 'Leo' %k('&sect;Mar':u) = 'Cancer' %k('&sect;Jun':u) = 'Ursa Minor' %k('&sect;Nov':u) = 'Andromeda' %k('&sect;Dec':u) = 'Aries' %k('&sect;Feb':u) = 'Canis Major' %sel is object selectionCriterion for longstring %n is float %sel = LT(this, 'C') %n = %k:findNextitemNumber(%sel) print %k:nameByNumber(%n) %n = %k:findNextItemNumber(%sel, start=%n) print %k:nameByNumber(%n) %n = %k:findPreviousItemNumber(EQ(this, 'Leo'), start=%n) print %k:nameByNumber(%n) end

    The result is:

    §Dec §Nov §Apr

See also

  • FindPreviousItemNumber is identical to FindNextItemNumber except that it searches backward in the FloatNamedArraylist, NamedArraylist or UnicodeNamedArraylist.