Unlock the Thrill of Ice-Hockey Under 6.5 Goals: A Kenyan Perspective
Kenya's love for sports is growing, and ice-hockey is no exception. With fresh matches updated daily, this niche yet thrilling sport offers a unique betting experience. Dive into the world of ice-hockey under 6.5 goals, where expert predictions meet the excitement of every match. Whether you're a seasoned bettor or new to the game, this guide will enhance your understanding and betting strategy.
Understanding Ice-Hockey Under 6.5 Goals
Ice-hockey under 6.5 goals is a popular betting market that focuses on the total number of goals scored in a match. Bettors predict whether the combined score will be under or over 6.5 goals. This market is ideal for those who enjoy strategic betting and want to capitalize on lower-scoring games.
Why Choose Ice-Hockey Under 6.5 Goals?
- Consistent Betting Opportunities: With daily updates, there's always a fresh match to bet on, keeping the excitement alive.
- Strategic Betting: Analyze team performance, player statistics, and historical data to make informed predictions.
- Lower Risk: Betting on under 6.5 goals can be less risky compared to other markets, as fewer goals often lead to more predictable outcomes.
Expert Betting Predictions: How to Get Started
Betting on ice-hockey requires a blend of knowledge, strategy, and intuition. Here are some expert tips to enhance your betting predictions:
Analyze Team Performance
Study recent matches to understand each team's playing style and goal-scoring ability. Teams with strong defenses are more likely to keep the score low.
Consider Player Statistics
Look at key players' form and fitness. Star players returning from injury might impact the game's dynamics and goal tally.
Historical Data Matters
Review past encounters between teams. Historical data can provide insights into scoring patterns and defensive strengths.
Weather and Venue Conditions
Although ice-hockey is played indoors, external factors like venue conditions can still influence team performance.
Betting Platforms and Tools
Leverage online betting platforms that offer comprehensive data analysis tools. These platforms provide valuable insights and real-time updates.
Daily Match Updates: Stay Informed
To stay ahead in the betting game, it's crucial to have access to daily match updates. Here’s how you can keep informed:
- Sports News Websites: Follow reputable sports news websites for the latest match reports and updates.
- Social Media Channels: Join sports betting communities on social media platforms for real-time discussions and insights.
- Betting Apps: Use dedicated betting apps that offer push notifications for live updates and match changes.
- Email Newsletters: Subscribe to newsletters from trusted betting sites for curated content and expert predictions.
Betting Strategies for Ice-Hockey Under 6.5 Goals
Developing a solid betting strategy can significantly improve your chances of success. Here are some strategies tailored for ice-hockey under 6.5 goals:
Bet on Defensive Powerhouses
Teams known for their strong defense are more likely to keep the score low. Analyze defensive records before placing your bets.
Avoid High-Scoring Teams
If both teams have a history of high-scoring matches, it might be safer to avoid betting on under 6.5 goals.
Leverage Live Betting
Live betting allows you to place bets as the game unfolds. Use this option to react to real-time events and adjust your strategy accordingly.
Diversify Your Bets
Diversify your betting portfolio by placing multiple bets across different matches and markets. This approach spreads risk and increases potential rewards.
Maintain Discipline
Set a budget for your bets and stick to it. Avoid chasing losses by placing impulsive bets.
Famous Matches: Lessons from History
Studying famous ice-hockey matches can provide valuable lessons for bettors. Here are some notable examples:
- The Classic Underdog Victory: Analyze matches where underdogs triumphed despite being heavy underdogs in terms of goal expectations.
- The Defensive Masterclass: Review games where teams showcased exceptional defensive skills, keeping the score low against formidable opponents.
- The Unexpected High Scorers: Identify matches where teams unexpectedly scored high, breaking their usual scoring patterns.
This analysis helps in understanding trends and making better predictions in future matches.
The Role of Analytics in Ice-Hockey Betting
<|repo_name|>zhuyilong/zhuyilong.github.io<|file_sep|>/_posts/2019-04-29-Effective-Java.md
---
layout: post
title: Effective Java学习笔记(一)
subtitle: 第1章 开始
date: 2019-04-29
author: zhuyilong
header-img: img/post-bg-e2e-ux.jpg
catalog: true
tags:
- Java
---
## 第1章 开始
### 原则1：考虑用静态工厂方法替代构造器
- 构造器总是隐含地创建新对象，而静态工厂方法不一定如此。静态工厂方法可以返回原先创建的对象的引用。
- 静态工厂方法的名称由具体实现决定，没有约定俗成的命名规则。
- 静态工厂方法不能被子类化，所以它们不能为子类提供多个构造器的便利。如果需要这样做，只能定义构造器并提供公有或者受保护的构造器。
- 每个构造器都必须明确地在类中声明，而静态工厂方法可以根据需要随时添加和删除。这使得它们很适合用来创建不可变类的实例，因为在不可变类的生命周期内，不可变类可能会有多个实例。
### 原则2：遵守有效参数数量的约定
1、0个参数
- 构造器和静态工厂方法都可以接收0个参数。如果只有一个无参数的构造器或者静态工厂方法，它通常表示创建一个包含默认值的新实例。这种情况下，无参数构造器和静态工厂方法没有本质区别。
2、一个参数
- 如果存在一个带单一参数的构造器或者静态工厂方法，该参数类型应该是对象自身或者其直接超类，并且不应该是基本类型或者包装类型。
- 在Java中，有两种命名风格可以用来标识带单一对象参数的构造器或者静态工厂方法：
1）拷贝构造器：形式为public T(T t)；
2）valueOf：public static T valueOf(T t)；
3、多个参数
- 如果存在多个参数，则应该考虑用Builder模式来替换多参数构造器。
### 原则3：通过私有构造器或者枚举类型强化Singleton属性
#### 单例模式：
- 想要创建单例类，只能有一个实例，并且能够全局访问。一般使用私有构造器和公有静态成员变量。
java
public class Elvis {
private static final Elvis INSTANCE = new Elvis();
private Elvis() {}
public static Elvis getInstance() {
return INSTANCE;
}
}
#### 饿汉式单例：
java
public class Elvis {
private static final Elvis INSTANCE = new Elvis();
private Elvis() {}
public static Elvis getInstance() {
return INSTANCE;
}
}
#### 懒汉式单例：
java
public class Elvis {
private static Elvis INSTANCE;
private Elvis() {}
public static synchronized Elvis getInstance() {
if(INSTANCE == null) {
INSTANCE = new Elvis();
}
return INSTANCE;
}
}
#### 双重检查锁定（DCL）：
java
public class Elvis {
private volatile static Elvis INSTANCE;
private Elvis() {}
public static Elvis getInstance() {
if(INSTANCE == null) {
synchronized(Elvis.class) {
if(INSTANCE == null) {
INSTANCE = new Elvis();
}
}
}
return INSTANCE;
}
}
### 原则4：通过私有构造器强化不可实例化的能力
#### 不可实例化：
- 如果某个类仅仅是为了提供static成员而设计，并不打算让它被实例化，那么可以把它的所有构造器都声明为私有的。这样做可以防止用户错误地实例化这个类，并且编译器会拒绝非私有或者受保护的无参构造器。
java
public class UtilityClass {
private UtilityClass() {}
public static void method1() {}
public static void method2() {}
}
#### 枚举类型：
- 如果要定义一个只有枚举值得实例化形式的类，并且不打算给它添加其他功能（比如Comparable接口），那么枚举类型是最好的选择。枚举类型既能够保证只有指定的值被实例化，也能够防止用户创建未指定的实例。
java
//通过enum定义枚举类型。
public enum Operation {PLUS, MINUS, TIMES, DIVIDE}
//通过枚举类型定义Singleton。
public enum Elvis {
SINGLETON;
public void leaveTheBuilding() {}
}
//使用枚举类型定义常量集合。
public enum BooleanConstants {
TRUTH(true), FALSEHOOD(false);
private final boolean value;
BooleanConstants(boolean value) {this.value = value;}
public boolean booleanValue() {return value;}
}
//使用枚举类型定义常量集合。
public enum Suit {CLUBS(12), DIAMONDS(13), HEARTS(14), SPADES(15);
private final int rank;
Suit(int rank) {this.rank = rank;}
public int rank() {return rank;}
}
//使用枚举类型定义策略。
interface TextRepresentable {
String asText();
}
class Shape implements TextRepresentable{
private Color color;
class Color implements TextRepresentable{
private String colorName;
public String asText(){return colorName;}
}
public String asText(){
return "A " + color.asText() + " shape.";
}
public enum ShapeType implements TextRepresentable{
CIRCLE("A circle"),
RECTANGLE("A rectangle");
private final String asText;
private ShapeType(String asText){this.asText = asText;}
public String asText(){return asText;}
public Shape(Color color, ShapeType type){
this.color = color;
this.type = type;
}
}
//使用枚举类型定义域特定语言。
interface Expr{
double eval();
}
class Constant extends Expr{
final double value;
public Constant(double value){this.value = value;}
public double eval(){return value;}
}
class Negate extends Expr{
final Expr expr;
public Negate(Expr expr){this.expr = expr;}
public double eval(){return -expr.eval();}
}
class Plus extends Expr{
final Expr augend;
final Expr addend;
public Plus(Expr augend, Expr addend){
this.augend = augend; this.addend = addend;
}
public double eval(){
return augend.eval() + addend.eval();
}
class Mult extends Expr{
final Expr factor1; final Expr factor2;
public Mult(Expr factor1, Expr factor2){
this.factor1 = factor1; this.factor2 = factor2;
}
public double eval(){
return factor1.eval() * factor2.eval();
}
enum Operator implements Expr{
ADD{ public Expr apply(Expr augend, Expr addend){return new Plus(augend, addend);} },
SUB{ public Expr apply(Expr augend, Expr addend){return new Plus(augend,new Negate(addend));} },
MUL{ public Expr apply(Expr factor1, Expr factor2){return new Mult(factor1,factor2);} };
final private Function op;
private Operator(Function op){this.op = op;}
public Expr apply(Expr ... args){
return op.apply(Arrays.copyOf(args,args.length));
}
static class Parser{
static Stack operators = new Stack<>();
static Stack expressions = new Stack<>();
static void parse(String input){
expressions.push(new Constant(Double.parseDouble(input)));
}
static void applyOperator(){
expressions.push(
operators.pop().apply(expressions.pop(),expressions.pop()));
}
static void setOperator(char operatorSymbol){
switch(operatorSymbol){
case '+': operators.push(Operator.ADD); break;
case '-': operators.push(Operator.SUB); break;
case '*': operators.push(Operator.MUL); break;
default: throw new IllegalArgumentException("Unknown operator:" + operatorSymbol);
}
}
}
}
### 原则5：避免创建不必要的对象
#### 不必要对象：
1、使用基本数据类型而不是包装数据类型。
java
List primes = Arrays.asList(2,3,5,7);
int sum = primes.stream().mapToInt(Integer::intValue).sum(); //mapToInt转换Integer->int
2、避免使用字符串连接符（+）来拼接字符串。
java
StringBuilder sb = new StringBuilder();
for(String s : strings){
sb.append(s);
sb.append(c);
}
String joinedString = sb.toString();
3、当数组作为方法参数传递时，尽量避免对其进行slice操作（Arrays.copyOfRange(array,start,end)）。
### 原则6：消除过期的对象引用以便促进垃圾回收
#### 对象引用：
如果一个对象仍然被引用着，则垃圾回收机制不能回收该对象占据的内存空间。对于短期性生命周期较短而且重复创建销毁的对象来说，消除对其引用是非常重要的，否则可能导致内存溢出。
java
public List splitIntoLines(String text){
ArrayList builderList = new ArrayList<>();
int start=0,end=0;
while(end != -1){
end=text.indexOf("n",start);
builderList.add(new StringBuilder(text.substring(start,end)));
start=end+1; //将start指向下一个字符。
}
builderList.trimToSize(); //将ArrayList大小缩小到builderList.size()
List swap=builderList;//交换引用使得builderList指向null。
StringBuilder b=null;//b指向null。
for(StringBuilder sb : swap){//将swap中所有元素置为null。
sb=null;//释放StringBuilder占据内存空间。
}
return swap.stream().map(StringBuilder::toString).collect(toList());//将swap中所有元素转换成字符串形式返回。
}//当离开当前作用域时swap、builderList、b将会被回收。
### 原则7：优先考虑值栈而非线程堆栈
#### 栈帧：
线程执行过程中需要额外分配内存空间保存局部变量、操作数和动态链接等信息。这部分额外分配出来的内存空间被称作栈帧（Stack Frame），通常是线程私有区域。
#### 栈帧分配策略：
1、线程堆栈（Thread stack）：栈帧在线程堆栈上分配。每个线程都有自己独立管理和分配栈帧空间。缺点：当需要大量分配小型栈帧时会出现频繁上下文切换导致性能下降。
2、值栈（Value stack）：