 member - Maple Help

Indexable.member

test for membership in the collection Calling Sequence boolean member( Algebraic e ) throws MapleException Description

 • The member function returns true if e is an element in the collection corresponding to the Indexable and false otherwise.
 • Note that member compares e against the values themselves, not against the indices (keys). If the collection is a Table, the has function may be used to test whether e is an index in the table. Examples

 import com.maplesoft.openmaple.*; import com.maplesoft.externalcall.MapleException; class Example { public static void main( String notused[] ) throws MapleException { String[] mapleArgs = { "java" }; Engine engine = new Engine( mapleArgs, new EngineCallBacksDefault(), null, null ); Indexable ind; ind = (Indexable)engine.evaluate( "[2,5,sin(x),exp(nu),7.5]:" ); System.out.println( "Is 2 in the list: " + ind.member( engine.newNumeric( 2 ) ) ); System.out.println( "Is 3 in the list: " + ind.member( engine.newNumeric( 3 ) ) ); ind = (Indexable)engine.evaluate( "{3,7,9,11,13}:" ); System.out.println( "Is 2 in the set: " + ind.member( engine.newNumeric( 2 ) ) ); System.out.println( "Is 3 in the set: " + ind.member( engine.newNumeric( 3 ) ) ); ind = (Indexable)engine.evaluate( "table([ 2 = 3, 4 = \"somestring\", 5 = Pi/2 ]):" ); System.out.println( "Is 2 in the table: " + ind.member( engine.newNumeric( 2 ) ) ); System.out.println( "Is 3 in the table: " + ind.member( engine.newNumeric( 3 ) ) ); ind = (Indexable)engine.evaluate( "Array( 1..3, 1..3, (i,j)->(i*j)+1 ):" ); System.out.println( "Is 2 in the Array: " + ind.member( engine.newNumeric( 2 ) ) ); System.out.println( "Is 3 in the Array: " + ind.member( engine.newNumeric( 3 ) ) ); } }

Executing this code produces the following output:

 Is 2 in the list: true Is 3 in the list: false Is 2 in the set: false Is 3 in the set: true Is 2 in the table: false Is 3 in the table: true Is 2 in the Array: false Is 3 in the Array: true