Initial commit

.classpath

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<classpath>
+	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.8"/>
+	<classpathentry kind="src" path="src"/>
+	<classpathentry kind="output" path="bin"/>
+</classpath>

.project

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+<?xml version="1.0" encoding="UTF-8"?>
+<projectDescription>
+	<name>mapfilterfold</name>
+	<comment></comment>
+	<projects>
+	</projects>
+	<buildSpec>
+		<buildCommand>
+			<name>org.eclipse.jdt.core.javabuilder</name>
+			<arguments>
+			</arguments>
+		</buildCommand>
+	</buildSpec>
+	<natures>
+		<nature>org.eclipse.jdt.core.javanature</nature>
+	</natures>
+</projectDescription>

.settings/org.eclipse.jdt.core.prefs

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+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.8
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=1.8
+org.eclipse.jdt.core.compiler.debug.lineNumber=generate
+org.eclipse.jdt.core.compiler.debug.localVariable=generate
+org.eclipse.jdt.core.compiler.debug.sourceFile=generate
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.source=1.8

src/mapfilterfold/ListImplementation.java

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+package mapfilterfold;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.function.Function;
+import java.util.function.Predicate;
+
+public class ListImplementation {
+
+	public static <T, R> List<R> map(Function<T, R> func, List<T> list) {
+		
+		List<R> result = new ArrayList<R>(list.size());
+		for (int i = 0; i < list.size(); i++)
+			result.set(i, func.apply(list.get(i)));
+		return result;
+		
+	}
+	
+	public static <T> List<T> filter(Predicate<T> pred, List<T> list) {
+		
+		List<T> result = new ArrayList<T>(list.size());
+		for (int i = 0; i < list.size(); i++)
+			if (pred.test(list.get(i)))
+				result.add(list.get(i));
+		return result;
+		
+	}
+	
+}