MinimumItem (Arraylist function): Difference between revisions
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<td>An <var>Arraylist</var> object.</td></tr> | <td>An <var>Arraylist</var> object.</td></tr> | ||
<tr><th> | <tr><th>itemFunction</th> | ||
<td>A function that operates on the type of the items in the <var>Arraylist</var>. It may be a [[Local and Common entities|local method]] or [[Method variables|method variable]] or a class member (<var>Variable</var>, <var>Property</var>), and it must return an [[Intrinsic classes|intrinsic]] value. The default <var class="term"> | <td>A function that operates on the type of the items in the <var>Arraylist</var>. It may be a [[Local and Common entities|local method]] or [[Method variables|method variable]] or a class member (<var>Variable</var>, <var>Property</var>), and it must return an [[Intrinsic classes|intrinsic]] value. The default <var class="term">itemFunction</var> value is the special identity function, <var>[[Collections#Using the This function as the Maximum parameter|This]]</var>, which simply returns the item value.</td></tr> | ||
</table> | </table> | ||
==Usage notes== | ==Usage notes== | ||
<ul> | <ul> | ||
<li>The optional <var class="term"> | <li>The optional <var class="term">itemFunction</var> parameter lets you further manipulate the <var>Arraylist</var> item values before performing the <var>MinimumItem</var> method's item evaluation. | ||
The <var class="term"> | The <var class="term">itemFunction</var> default (identity function <var>This</var>) fails against non-intrinsic values, however. If your <var>Arraylist</var> items are <i>not</i> intrinsic values, you must specify an <var class="term">itemFunction</var> function that can map the item values to intrinsic values. | ||
</ul> | </ul> | ||
Latest revision as of 16:46, 27 July 2012
Get item that has minimum value (Arraylist class)
[Introduced in Sirius Mods 7.8]
MinimumItem is related to the Minimum Arraylist method, which returns the number or name of the item that has the minimum value in an Arraylist.
Syntax
%item = al:MinimumItem[( [itemFunction])]
Syntax terms
%item | An Arraylist item of the same type as the al object. |
---|---|
al | An Arraylist object. |
itemFunction | A function that operates on the type of the items in the Arraylist. It may be a local method or method variable or a class member (Variable, Property), and it must return an intrinsic value. The default itemFunction value is the special identity function, This, which simply returns the item value. |
Usage notes
- The optional itemFunction parameter lets you further manipulate the Arraylist item values before performing the MinimumItem method's item evaluation. The itemFunction default (identity function This) fails against non-intrinsic values, however. If your Arraylist items are not intrinsic values, you must specify an itemFunction function that can map the item values to intrinsic values.
Examples
For the ArrayList %al
whose items are the odd integers between 10 and 0, MinimumItem returns the value of the item that has the minimum value, while Minimum returns the index (item number) of that item:
b %al is arraylist of float %al = list(9,7,5,3,1) printText {~=%al:minimumItem} printText {~=%al:minimum} end
The result is:
%al:minimumItem=1 %al:minimum=5