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package functions.one;
interface ArrFun {
public int[] exec(int[] x);
}
interface IntFun {
public int exec(int x);
}
class Abs implements IntFun {
public int exec(int x) {
//SAME AS: if (x < 0) return -x; else return x;
return (x < 0) ? -x : x;
}
}
class Cube implements IntFun {
public int exec(int x) {
return x*x*x;
}
}
class Map implements ArrFun {
IntFun f;
public Map(IntFun f) { this.f = f; }
public int[] exec(int[] x) {
int[] answer = new int[x.length];
for (int i=0; i<x.length; i++) {
answer[i] = f.exec(x[i]);
}
return answer;
}
}
class Main {
public static void print(int[] x) {
System.out.print("[ ");
for (int i=0; i<x.length; i++)
System.out.print(x[i]+ " ");
System.out.println("]");
}
public static void main(String[] argv) {
IntFun f = new Abs();
System.out.println(f.exec(-5));
int[] a = new int[10];
for (int i=0; i<a.length; i++)
a[i] = -i*10;
ArrFun mabs = new Map(new Comp(new Abs(), new Cube()));
print(mabs.exec(a));
}
}
class Comp implements IntFun {
IntFun f, g;
public Comp(IntFun f, IntFun g) { this.f = f; this.g = g; }
public int exec(int x) {
return g.exec(f.exec(x));
}
}
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