Trait DigitSum 

pub trait DigitSum: Sized {
    // Required method
    fn digit_pow_sum(self, base: Self, exp: u32) -> Self;

    // Provided method
    fn digit_sum(self, base: Self) -> Self { ... }
}

桁和。

Examples

use nekolib::math::DigitSum;

assert_eq!(2_u32.pow(15).digit_sum(10), 3 + 2 + 7 + 6 + 8);
assert_eq!(123_u32.digit_pow_sum(10, 2), 1*1 + 2*2 + 3*3);
assert_eq!(0xACE_u32.digit_sum(16), 0xA + 0xC + 0xE);

assert_eq!(12345_u32.digit_pow_sum(10, 0), 5);  // the number of digits
assert_eq!(0_u32.digit_pow_sum(10, 0), 1);

Required Methods

fn digit_pow_sum(self, base: Self, exp: u32) -> Self

Provided Methods

fn digit_sum(self, base: Self) -> Self

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl DigitSum for u8

fn digit_pow_sum(self, base: Self, exp: u32) -> Self

impl DigitSum for u16

fn digit_pow_sum(self, base: Self, exp: u32) -> Self

impl DigitSum for u32

fn digit_pow_sum(self, base: Self, exp: u32) -> Self

impl DigitSum for u64

fn digit_pow_sum(self, base: Self, exp: u32) -> Self

impl DigitSum for u128

fn digit_pow_sum(self, base: Self, exp: u32) -> Self

impl DigitSum for usize

fn digit_pow_sum(self, base: Self, exp: u32) -> Self

Implementors