forked from functionaljava/functionaljava
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathBigIntegers.java
More file actions
107 lines (95 loc) · 2.71 KB
/
BigIntegers.java
File metadata and controls
107 lines (95 loc) · 2.71 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
package fj.function;
import fj.F;
import fj.F2;
import fj.Monoid;
import fj.data.List;
import static fj.Function.curry;
import java.math.BigInteger;
/**
* Curried functions over Integers.
*
* @version %build.number%
*/
public final class BigIntegers {
private BigIntegers() {
throw new UnsupportedOperationException();
}
/**
* Curried Integer addition.
*/
public static final F<BigInteger, F<BigInteger, BigInteger>> add =
curry(new F2<BigInteger, BigInteger, BigInteger>() {
public BigInteger f(final BigInteger a1, final BigInteger a2) {
return a1.add(a2);
}
});
/**
* Curried Integer multiplication.
*/
public static final F<BigInteger, F<BigInteger, BigInteger>> multiply =
curry(new F2<BigInteger, BigInteger, BigInteger>() {
public BigInteger f(final BigInteger a1, final BigInteger a2) {
return a1.multiply(a2);
}
});
/**
* Curried Integer subtraction.
*/
public static final F<BigInteger, F<BigInteger, BigInteger>> subtract =
curry(new F2<BigInteger, BigInteger, BigInteger>() {
public BigInteger f(final BigInteger a1, final BigInteger a2) {
return a1.subtract(a2);
}
});
/**
* Negation.
*/
public static final F<BigInteger, BigInteger> negate = new F<BigInteger, BigInteger>() {
public BigInteger f(final BigInteger i) {
return i.negate();
}
};
/**
* Absolute value.
*/
public static final F<BigInteger, BigInteger> abs = new F<BigInteger, BigInteger>() {
public BigInteger f(final BigInteger i) {
return i.abs();
}
};
/**
* Remainder.
*/
public static final F<BigInteger, F<BigInteger, BigInteger>> remainder =
curry(new F2<BigInteger, BigInteger, BigInteger>() {
public BigInteger f(final BigInteger a1, final BigInteger a2) {
return a1.remainder(a2);
}
});
/**
* Power.
*/
public static final F<BigInteger, F<Integer, BigInteger>> power = curry(new F2<BigInteger, Integer, BigInteger>() {
public BigInteger f(final BigInteger a1, final Integer a2) {
return a1.pow(a2);
}
});
/**
* Sums a list of big integers.
*
* @param ints A list of big integers to sum.
* @return The sum of the big integers in the list.
*/
public static BigInteger sum(final List<BigInteger> ints) {
return Monoid.bigintAdditionMonoid.sumLeft(ints);
}
/**
* Returns the product of a list of big integers.
*
* @param ints A list of big integers to multiply together.
* @return The product of the big integers in the list.
*/
public static BigInteger product(final List<BigInteger> ints) {
return Monoid.bigintMultiplicationMonoid.sumLeft(ints);
}
}