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article {
    display: block;
}

html {
    font-family: sans-serif;
    -ms-text-size-adjust: 100%;
    -webkit-text-size-adjust: 100%;
}

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# disable selinux
echo SELINUX=disabled      > /etc/sysconfig/selinux
echo SELINUXTYPE=targeted >> /etc/sysconfig/selinux
setenforce 0
 
# disable firewall
systemctl disable firewalld

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public final class WildCharUtils {
    private static final char ESCAPES[] = { '$', '^', '[', ']', '(', ')', '{', '|', '+', '\\', '.', '<', '>' };
    private final String regexp;

    public static Pattern compile(String pattern) {
        return new Pattern(pattern);
    }
 
    private Pattern(String pattern) {
        regexp = wildcardToRegexp(pattern);

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JAXB, stands for Java Architecture for XML Binding, using JAXB annotation to convert Java object to / from XML file. In this tutorial, we show you how to use JAXB to do following stuffs :

• Marshalling – Convert a Java object into a XML file.
• Unmarshalling – Convert XML content into a Java Object.

Technologies used in this article

• JDK 1.6
• JAXB 2.0

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git stash用于保存和恢复工作进度

• git stash

  保存当前的工作进度。会分别对暂存区和工作区的状态进行保存

• git stash save "message..."

这条命令实际上是第一条 git stash 命令的完整版

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1. install virtualbox-guest-dkms for ubuntu 64bit (解决分辨率问题)

sudo apt-get install virtualbox-guest-dkms
sudo reboot

2. remove libreoffice

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install java

sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java8-installer 

sudo update-java-alternatives -s java-8-oracle

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1. 语法方面 ===================

• 不再支持的语法

  • 泛型定义: #define(List<String> str)
  • 强制类型转换: (String) s
  • ?. / ?[ NULL 安全调用: a?.b
  • ++ / --: i++
  • #put(key, value)

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(function(window, $) {

    /**
     * 实现打印功能（只打印网页中的一部分）
     *
     * Usage:
     *   <button jw-click-print="#printContext">Print</button>
     */
    var print = function($dom) {
        $("iframe.js-print").remove();

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public class Base62 {

    private static final char[] digitsChar = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ".toCharArray();
    private static final int BASE = digitsChar.length;
    private static final int FAST_SIZE = 'z';
    private static final int[] digitsIndex = new int[FAST_SIZE + 1];


    static {
        for (int i = 0; i < FAST_SIZE; i++) {