com.sl.algorithms.core.utils

Class NumberOps

java.lang.Object

com.sl.algorithms.core.utils.NumberOps

All Implemented Interfaces:

Constants

public class NumberOps
extends java.lang.Object
implements Constants

Field Summary

Fields inherited from interface com.sl.algorithms.core.interfaces.base.Constants

ARRAY_IS_EMPTY, DATA_TYPE_NOT_SUPPORTED_YET, DECIMAL_RADIX, DELIMITER_COMMA, ELEMENT_NOT_FOUND, LIST_IS_EMPTY, OPERATION_NOT_SUPPORTED_YET

Method Summary

Modifier and Type	Method and Description
static int[]	convertToArray(int n)
static java.lang.String	convertToBinary(int decimalNum)
static int	convertToDecimal(int binaryNum)
static int	convertToDecimal(java.lang.String binaryStr)
static int	convertToNumber(int[] a)
static int	convertToNumber(ListNode<java.lang.Integer> list)
static int	convertToNumberUsingPower(int[] a)
static int	countDigits(int n)
static int	countPrimes(int n) Sieve of Eratosthenes Complexity: O(nlog(log(n))
static java.lang.Integer[]	plusOne(java.lang.Integer[] digits)
static int	reverse(int n)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

countDigits

public static int countDigits(int n)

reverse

public static int reverse(int n)

convertToArray

public static int[] convertToArray(int n)

convertToNumber

public static int convertToNumber(int[] a)

convertToNumber

public static int convertToNumber(ListNode<java.lang.Integer> list)

convertToNumberUsingPower

public static int convertToNumberUsingPower(int[] a)

countPrimes

public static int countPrimes(int n)

Sieve of Eratosthenes

Complexity: O(nlog(log(n))

Parameters:

n - number to introspect

Returns:

count of prime-numbers before n

convertToBinary

public static java.lang.String convertToBinary(int decimalNum)

convertToDecimal

public static int convertToDecimal(int binaryNum)

convertToDecimal

public static int convertToDecimal(java.lang.String binaryStr)

plusOne

public static java.lang.Integer[] plusOne(java.lang.Integer[] digits)