la.util

Class Util

java.lang.Object

la.util.Util

public class Util
extends java.lang.Object

A few general purpose constants and utility functions/methods. Also see README.

Constructor Summary

Constructors

Constructor and Description
Util()

Method Summary

Modifier and Type	Method and Description
static void	error(java.lang.String msg) Throw a RuntimeException, RTE(msg).
static int	interleave16(int m, int n) Return the lower 16 bits of 'm' and of 'n' interleaved.
static int	location(int[] ns, int n) Binary search 'ns[]' for 'n'; return n's location or else -1.
static void	main(java.lang.String[] args)
static java.lang.RuntimeException	RTE(java.lang.String msg) Convenience function for new RuntimeException(msg).
static boolean	search(int[] ns, int n) Binary search 'ns[]' for 'n'.
static java.lang.String	x2String(double x) Render a double, x, compactly and to at least three significant digits; also see x2String(double,int).
static java.lang.String	x2String(double x, int sigDigits) Render a double, x, as compactly as possibly while guaranteeing 'sigDigits' significant digits.

Methods inherited from class java.lang.Object

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

Constructor Detail

Util

public Util()

Method Detail

RTE

public static java.lang.RuntimeException RTE(java.lang.String msg)

Convenience function for new RuntimeException(msg).

error

public static void error(java.lang.String msg)

Throw a RuntimeException, RTE(msg).

x2String

public static java.lang.String x2String(double x)

Render a double, x, compactly and to at least three significant digits; also see x2String(double,int).

x2String

public static java.lang.String x2String(double x,
                                        int sigDigits)

Render a double, x, as compactly as possibly while guaranteeing 'sigDigits' significant digits.

location

public static int location(int[] ns,
                           int n)

Binary search 'ns[]' for 'n'; return n's location or else -1. Also see search(ns,n).

search

public static boolean search(int[] ns,
                             int n)

Binary search 'ns[]' for 'n'. Is its location within the array?

interleave16

public static int interleave16(int m,
                               int n)

Return the lower 16 bits of 'm' and of 'n' interleaved. Any higher bits of m and n are ignored. (See [www]['15].)

main

public static void main(java.lang.String[] args)