itang

(import [com.ning.compress.lzf LZFInputStream LZFOutputStream])
(import [java.io.FileInputStream FileOutputStream])
(require '[clojure.java.io :as io])

(with-open [in  (FileInputStream. "D:/tmp/dd.txt")
            out (LZFOutputStream. (FileOutputStream. "D:/tmp/dd.lzf"))]
  (io/copy in out))

(with-open [in  (LZFInputStream. (FileInputStream. "D:/tmp/dd.lzf"))
            out (FileOutputStream. "D:/tmp/ddd.txt")]

itang

 public static List<byte[]> grouped(final byte[] input, final int length) {
            if (length <= 0) {
                throw new IllegalArgumentException("length must gt 0");
            }
            List<byte[]> ret = new ArrayList<byte[]>();

            int r = input.length / length;
            int from = 0;
            int to = 0;
            for (int i = 0; i < r; i++) {

itang

mvn install:install-file -DgroupId=org.aopalliance -DartifactId=com.springsource.org.aopalliance  -Dversion=1.0.0 -Dfile=com.springsource.org.aopalliance-1.0.0.jar  -Dpackaging=jar 

itang

package controllers

import (
	"fmt"
	"time"

	"github.com/astaxie/beego"
	"github.com/astaxie/beego/context"
)

itang

$ cd /lib/x86_64-linux-gnu
$ sudo ln -s libudev.so.1 libudev.so.0

edit /usr/bin/google-chrome, add line:
export LD_LIBRARY_PATH=/lib/x86_64-linux-gnu:$LD_LIBRARY_PATH #Above The Non-last line

itang

package main

import (
	"log"
	"reflect"
)

type IHello interface {
	Hello()
}

itang

package main;import "reflect";func main(){ var a interface{} = 1;if a == nil { println("nil")};if a != nil { println(reflect.ValueOf(a).Int()) } ;}

//output:
1

itang

func appBootstrap() {
	tryOverrideVarFromEnv(&beego.RunMode, "RunMode")
	tryOverrideVarFromEnv(&beego.HttpPort, "HttpPort")
}

func tryOverrideVarFromEnv(target interface{}, key string) {
	v := os.Getenv(key)
	if v != "" {
		switch t := target.(type) {
		case *string:

itang

package main

import (
	"fmt"
)

func main() {
	var a []int = nil
	fmt.Printf("len[a]:%v\n", len(a)) // len[a]:0
	var b []int = []int{}

itang

package main

import "fmt"

func main() {
	var s string = ""
	var s1 string

	fmt.Printf("len(s):%v\n", len(s)) // len(s):0
	fmt.Printf("len(s1):%v\n", len(s1)) //len(s1):0