georgeOsdDev

function* idMaker(prefix){ 
   let idx = 0; 
   while(true){ 
      yield `${prefix}_${idx++}`;    
   } 
}
let users = idMaker("user");
console.log(users.next()) // {"value":"user_0","done":false}
console.log(users.next()) // {"value":"user_1","done":false}

georgeOsdDev

scala> var s: Option[String] = None

scala> s = None
scala> s.foreach {_ =>
     |   s = Some("some")
     | }

scala> s
// => ???

georgeOsdDev

package quickstart.action

import java.util.concurrent.TimeUnit
import scala.util.Random

import io.netty.channel.{ChannelFuture, ChannelFutureListener}
import io.netty.util.{HashedWheelTimer, TimerTask, Timeout}

import xitrum.{Action, SkipCsrfCheck}
import xitrum.annotation.GET

georgeOsdDev

scala > for (i <- 0 to 17){
     | val token = scala.util.Random.alphanumeric.take(29).map{s => "%02x".format(s.toByte)}.mkString("") + "%06x".format(i)
     | println(token)
     | }
     
39514f6965667341367934535a5272513766653353444c565557736942000000
3337534c71664c674a7543657a51427242417376446173455038667044000001
414f696a744c714866376749683551393772794b663074543561687063000002
536e4c5a4c5a69784571757672394e537564446c4f31786a5357594f61000003
65335a46306932495a437351513974514f4875323932516f52396c6e79000004

georgeOsdDev

git rev-parse --short HEAD

georgeOsdDev

var genGen = function(arr, loop){
  return (function* (){
    var idx = 0;
    var len = arr.length
    while(true){
      if (len === idx && loop) idx = 0;
      yield arr[idx++];
    }
  })();
};

georgeOsdDev

# https://docs.oracle.com/cd/E19416-01/820-5959/6nhaosbus/index.html
# http://wiki.eclipse.org/Jetty/Howto/Configure_SSL

openssl pkcs12 -export \
-in ./my.crt \
-inkey ./my.key \
-certfile intermediate.crt \
-out ./keystore.pkcs12 \
-name "xitrum" 

georgeOsdDev

function createPromise(name){
  return new Promise(function(resolve, reject){
    setTimeout(function(){
      if (Date.now()%2 === 0) {
        console.log(name+" is reolved");
        resolve(name+"_success");
      }else{
        console.log(name+" is rejected");
        reject(name+"_fail");
      }

georgeOsdDev

function parse(val){
  return Promise.resolve().then(function(){
    return JSON.parse(val);
  });
}

function parse2(val){
  return new Promise(function(resolve, reject){
    try{
      resolve(JSON.parse(val));

georgeOsdDev

encrypt
-------
$ echo "Hello World" | openssl enc -e -des -base64 -out encrypted -k myKey

result
-------
$ cat encrypted
U2FsdGVkX19pZy6kjZ4GTbTNeKeI1lWvoLjrpBqy0bw=

decrypt