package com.github.underscore;

import java.util.LinkedHashMap;
import java.util.Map;
import java.util.function.Function;

public abstract class MemoizeFunction<F, T> implements Function<F, T> {
    private final Map<F, T> cache = new LinkedHashMap<>();

    public abstract T calc(final F n);

    public T apply(final F key) {
        if (!cache.containsKey(key)) {
            cache.put(key, calc(key));
        }
        return cache.get(key);
    }
}

@@ -1,8 +1,1161 @@
+/*%0A * The MIT License (MIT)%0A *%0A * Copyright 2015-2022 Valentyn Kolesnikov%0A *%0A * Permission is hereby granted, free of charge, to any person obtaining a copy%0A * of this software and associated documentation files (the %22Software%22), to deal%0A * in the Software without restriction, including without limitation the rights%0A * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell%0A * copies of the Software, and to permit persons to whom the Software is%0A * furnished to do so, subject to the following conditions:%0A *%0A * The above copyright notice and this permission notice shall be included in%0A * all copies or substantial portions of the Software.%0A *%0A * THE SOFTWARE IS PROVIDED %22AS IS%22, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR%0A * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,%0A * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE%0A * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER%0A * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,%0A * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN%0A * THE SOFTWARE.%0A */%0A
 package 

Update MemoizeFunction.java