jostyee

public static String getIpStr(int ip) {
    StringBuilder sb = new StringBuilder();
	int addr[] = new int[4];
	addr[0] = (ip>>24) & 0xff;
	addr[1] = (ip>>16) & 0xff;
	addr[2] = (ip>>8) & 0xff;
	addr[3] = ip & 0xff;
	
	for (int i = 0; i < addr.length; i++) {
		sb.append(addr[i]);

jostyee

history | awk '{CMD[$2]++;count++;}END { for (a in CMD)print CMD[a] " " CMD[a]/count*100 "% " a;}' | grep -v "./" | column -c3 -s " " -t | sort -nr | nl |  head -n20

jostyee

git push -f origin HEAD^:master

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public int clearBits(int num, int i) {
  int mask = (1 << i) - 1;
  return num & mask;
}

jostyee

把 SSH 用起来

by 郑凯 zhengkai@gmail.com
2014.10.23

0. Chrome 插件

---

Secure Shell

jostyee

package main

// This is a basic example of running an nsqd instance embedded. It creates
// and runs an nsqd with all of the default options, and then produces
// and consumes a single message. You are probably better off running a
// standalone instance, but embedding it can simpllify deployment.

// See https://github.com/bitly/nsq/blob/master/nsqd/options.go and
// https://github.com/bitly/nsq/blob/master/apps/nsqd/nsqd.go for
// more details on how to configure an embedded nsqd instance.

jostyee

package consumer

import (
	"errors"
	"testing"

	"github.com/bitly/go-nsq"
)

// tests nsq.HandlerFunc. just write the function in line in the test

jostyee

Distributed Read-Write Mutex in Go

The default Go implementation of sync.RWMutex does not scale well to multiple cores, as all readers contend on the same memory location when they all try to atomically increment it. This gist explores an n-way RWMutex, also known as a "big reader" lock, which gives each CPU core its own RWMutex. Readers take only a read lock local to their core, whereas writers must take all locks in order.

jostyee

// Use Gists to store code you would like to remember later on
console.log(window); // log the "window" object to the console

jostyee

package main

import (
	"bytes"
	"fmt"
	"github.com/gorilla/mux"
	grpc "github.com/gorilla/rpc"
	"github.com/gorilla/rpc/json"
	"log"
	"net/http"