wcp1231

A simple snowflake conflict test

# defult: -i=2 -t=20 -u=100
> java SimpleSnowflakeTest.java
Generators QPS: [ 187 181]      Total IDs: 4176   (368 /s)      Conflicts: 1139  (104/s)        27.275%

# -t=20 -u=200 => 20 tokens pre 200 ms (100/s)
> java SimpleSnowflakeTest.java -t=20 -u=200
Generators QPS: [ 100 99]]      Total IDs: 3404   (199 /s)      Conflicts: 1062  (52 /s)        31.199%

wcp1231

package main

import (
	"crypto/sha512"
	"flag"
	"log"
	"syscall"
	"time"
)

wcp1231

local function assign(dist, source)
  for k,v in pairs(source) do dist[k] = v end
end

M = {}

local actions = {}
actions.__mt = {}
actions.__mt.__index = {
  method = 'GET',

wcp1231

Keybase proof

I hereby claim:

• I am wcp1231 on github.
• I am wcp1231 (https://keybase.io/wcp1231) on keybase.
• I have a public key whose fingerprint is 17FC 73FF 2142 3B77 BA36 AF4E 5F55 40D9 90F8 4418

To claim this, I am signing this object:

wcp1231

# python has no tail recursion optimization.
def f(n):
  if n == 0: return 1
  return n * f(n-1)
  
f(5000)
# > RuntimeError: maximum recursion depth exceeded

# so, we can use trampoline
def f(n):

wcp1231

ruby -run -e httpd . -p 5000

wcp1231

# 已知的bug是，如果一个元素分成几行就不会被匹配上
ruby -i.bak -rdate -pe '$_.gsub!(/(<(script|link|img)[^@%>]*=["][^"]*\.(js|css|png|jpg))/) {%Q|#{$1}?#{DateTime.now.strftime "%Y%m%d%H"}|}' ./**/*.jsp

wcp1231

# -*- coding: utf-8 -*-
import sys
from concurrent.futures import ThreadPoolExecutor
from datetime import datetime
import os
import re

def build_replace_func():
    version_string = "?ver=%s" % datetime.now().strftime("%Y%m%d%H")
  def func(match_obj):

wcp1231

public static String getFilecharset(File sourceFile) {
  String charset = "GBK";
  byte[] first3Bytes = new byte[3];
  try {
    BufferedInputStream bis = new BufferedInputStream(new FileInputStream(sourceFile));
    bis.mark(0);
    int read = bis.read(first3Bytes, 0, 3);
    System.out.println("字节大小："+read);
    if (read == -1) {
      return charset; //文件编码为 ANSI

wcp1231

// ==UserScript==
// @name        BISTU_Auto_Evaluate
// @namespace   http://wcp1231.github.io
// @include     http://jwgl.bistu.edu.cn/*
// @version     1
// ==/UserScript==

for(var i = 2; i < 8; i++) {
    var id = "DataGrid1__ctl" + i + "_JS1";
    document.getElementById(id).selectedIndex = 1;