calvinxiao

// Demostrate how to handle error in nodejs server

var restify = require('restify');

function getHello(req, res, next) {
    throw new Error('standard error happens here');
}

function postHello(req, res, next) {
    throw new MyError('here is my error');

calvinxiao

/**
 * a sort demo while learning go goroutine
 * sorting 10 million numbers concurrently
*/

package main

import (
    "fmt"
    "sort"

calvinxiao

with cork

[pid  1503] 13:16:32.931451 ppoll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}], 2, NULL, NULL, 8 <unfinished ...>
[pid  1510] 13:16:32.947050 <... ppoll resumed> ) = 0 (Timeout)
[pid  1510] 13:16:32.947298 read(3, 0x7fdcd905e780, 8) = -1 EAGAIN (Resource temporarily unavailable)
[pid  1510] 13:16:32.947616 sched_yield() = 0
[pid  1510] 13:16:32.947800 ppoll([{fd=3, events=POLLIN}], 1, {tv_sec=1, tv_nsec=0}, NULL, 8) = 0 (Timeout)
[pid  1510] 13:16:33.949327 read(3, 0x7fdcd905e780, 8) = -1 EAGAIN (Resource temporarily unavailable)
[pid  1510] 13:16:33.949578 sched_yield() = 0
[pid  1510] 13:16:33.949748 ppoll([{fd=3, events=POLLIN}], 1, {tv_sec=1, tv_nsec=0}, NULL, 8) = 0 (Timeout)

calvinxiao

require 'json'
require 'thread'

# Thread.abort_on_exception = true
# Thread.report_on_exception = true

# this will raise SystemStackOverflow
def json_dump
    obj = {}
    obj['c'] = obj

calvinxiao

package main

import (
	"sync"
	"sync/atomic"
	"testing"
)

const THREADS int = 8
const LOOP int = 100000

calvinxiao

==================
WARNING: ThreadSanitizer: data race (pid=14056)
  Write of size 8 at 0x7b04000000a0 by thread T19:
    #0 free <null> (libtsan.so.0+0x35f45)
    #1 <null> <null> (libc.so.6+0xd51b1)
    #2 operator() /home/eagle/github/my/kvrocks/src/server.cc:78 (kvrocks+0x1e9b79)
    #3 __invoke_impl<void, Server::Start()::<lambda()> > /usr/include/c++/9/bits/invoke.h:60 (kvrocks+0x1e9b79)
    #4 __invoke<Server::Start()::<lambda()> > /usr/include/c++/9/bits/invoke.h:95 (kvrocks+0x1e9b79)
    #5 _M_invoke<0> /usr/include/c++/9/thread:244 (kvrocks+0x1e9b79)

calvinxiao

/usr/share/rvm/rubies/ruby-3.0.0/lib/ruby/3.0.0/reline/unicode.rb:188:in `get_next_mbchar_size': undefined method `grapheme_clusters' for nil:NilClass (NoMethodError)
3.0.0 :0from /usr/share/rvm/rubies/ruby-3.0.0/lib/ruby/3.0.0/reline/line_editor.rb:1413:in `ed_next_char'
3.0.0 :0from /usr/share/rvm/rubies/ruby-3.0.0/lib/ruby/3.0.0/reline/line_editor.rb:951:in `call'
3.0.0 :0from /usr/share/rvm/rubies/ruby-3.0.0/lib/ruby/3.0.0/reline/line_editor.rb:951:in `wrap_method_call'
        from /usr/share/rvm/rubies/ruby-3.0.0/lib/ruby/3.0.0/reline/line_editor.rb:968:in `process_key'
        from /usr/share/rvm/rubies/ruby-3.0.0/lib/ruby/3.0.0/reline/line_editor.rb:1076:in `input_key'
        from /usr/share/rvm/rubies/ruby-3.0.0/lib/ruby/3.0.0/reline.rb:247:in `block (3 levels) in inner_readline'
        from /usr/share/rvm/rubies/ruby-3.0.0/lib/ruby/3.0.0/reline.rb:246:in `each'
        from /usr/share/rvm/rubies/ruby-3.0.0/lib/ruby/3.0.0/reline.rb:246:in `block (2 levels) in inner_readline'
        from /usr/share

calvinxiao

package main

import (
	"log"
	"math/rand"
)

//import "runtime"

var x, y, r1, r2 int

calvinxiao

package main

import (
	"encoding/json"
	"fmt"
	"sort"
)

func main() {
	input := `{