|
|
| (One intermediate revision by one other user not shown) |
| Line 1: |
Line 1: |
| <span style="font-size:120%; color:black"><b><section begin=dpl_desc/>Find matching FloatNamedArrayl<section end=dpl_desc/></b></span>
| | #REDIRECT [[FindNextItem (GenericNamedArraylist function)]] |
| [[Category:FloatNamedArraylist methods|FindNextItem function]]
| |
| <!--DPL?? Category:FloatNamedArraylist methods|FindNextItem function: Find matching FloatNamedArrayl-->
| |
| <p>
| |
| FindNextItem is a member of the [[FloatNamedArraylist class]].
| |
| </p>
| |
| | |
| This function searches “forward” in the FloatNamedArraylist to find and return
| |
| the next item that matches a specified criterion.
| |
| The criterion is supplied by the [[SelectionCriterion class|SelectionCriterion]] object
| |
| that is a required FindNextItem parameter.
| |
| If no item satisfies the criterion,
| |
| the request is cancelled and an ItemNotFound exception ([[??]] refid=itemnfe.)
| |
| is thrown.
| |
| | |
| FindNextItem is available in ''Sirius Mods'' version 7.6 and later.
| |
| ==Syntax==
| |
| %item = %fnamrayl:FindNextItem(criterion -
| |
| [, Start=itemnum])
| |
| ===Syntax Terms===
| |
| <dl>
| |
| <dt><i>%item</i>
| |
| <dd>A variable of the type of the items in the FloatNamedArraylist to contain the
| |
| item that is located by the search.
| |
| <dt><i>%fnamrayl</i>
| |
| <dd>A FloatNamedArraylist object.
| |
| <dt><i>criterion</i>
| |
| <dd>A SelectionCriterion object, which is a relational expression that is
| |
| applied to a ''%fnamrayl'' 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, <tt>GT(this, -1)</tt> is the
| |
| criterion <tt>this</tt> <tt>></tt> <tt>-1</tt>, where
| |
| <tt>this</tt> is an identity function that simply returns the item's value.
| |
| The first item tested by FindNextItem 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 ''%fnamrayl''
| |
| 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 FloatNamedArraylist.
| |
| For a FloatNamedArraylist of three items, ''itemnum'' may be 0, 1, 2, or 3.
| |
| | |
| This is an optional argument, and it defaults to 0.
| |
| If you specify a value, the parameter name <tt>Start</tt> is required.
| |
| | |
| </dl>
| |
| ==Usage Notes==
| |
| <ul>
| |
| <li>If the value of Start is greater than the number of items in the
| |
| FloatNamedArraylist, the request is cancelled.
| |
| If the value of Start is equal to the number of items,
| |
| the request is cancelled, but an ItemNotFound exception is thrown.
| |
| <li>[[FindPreviousItem (FloatNamedArraylist function)|FindPreviousItem]]
| |
| is identical to FindNextItem except that it searches backward in the
| |
| FloatNamedArraylist.
| |
| </ul>
| |
| ==Examples==
| |
| | |
| In the following fragment, two FindNextItem calls are applied to a
| |
| FloatNamedArraylist
| |
| of objects of the <tt>annual</tt> class that is defined in the
| |
| request in the "[[Minimum (FloatNamedArraylist function)#Examples|FloatNamedArraylist Minimum function example]]".
| |
| The second call finds no matching item:
| |
| <pre style="xmp">
| |
| %fann is floatnamedArraylist of object annual
| |
| %fann = new
| |
| %fann(12) = newa(621, 650)
| |
| %fann(14) = newa(334, 343)
| |
| %fann(15) = newa(288, 276)
| |
| %fann(13) = newa(141, 182)
| |
| %fann(11) = newa(131, 115)
| |
| | |
| %sel is object selectionCriterion for object annual
| |
| %sel2 is object selectionCriterion for object annual
| |
| %sel = AND(GT(chg, 10), LE(yend, 200))
| |
| %sel2 = AND(GT(chg, 10), LE(yend, 100))
| |
| | |
| %ann is object annual
| |
| %ann = %fann:findNextItem(%sel)
| |
| print %ann:myprint
| |
| | |
| %ann = %fann:findNextItem(%sel2)
| |
| print %ann:myprint
| |
| </pre>
| |
| | |
| The result is:
| |
| <pre style="xmp">
| |
| ybegin=141, yend=182
| |
| Class FLOATNAMEDARRAYLIST, function FINDNEXTITEM:
| |
| ITEMNOTFOUND exception: no items match Selection-
| |
| Criterion in line 54
| |
| </pre>
| |