corehello

# First the server

#!/usr/bin/env python
#!/usr/bin/env python

"""
A basic, multiclient 'chat server' using Python's select module
with interrupt handling.

Entering any line of input at the terminal will exit the server.

corehello

/*
Copyright 2014 Google Inc. All rights reserved.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software

corehello

(LET ((server (SOCKET:SOCKET-SERVER)))
  (FORMAT t "~&Waiting for a connection on ~S:~D~%"
          (SOCKET:SOCKET-SERVER-HOST server) (SOCKET:SOCKET-SERVER-PORT server))
  (UNWIND-PROTECT
      ;; infinite loop, terminate with Control+C
      (LOOP (WITH-OPEN-STREAM (socket (SOCKET:SOCKET-ACCEPT server))
              (MULTIPLE-VALUE-BIND (local-host local-port) (SOCKET:SOCKET-STREAM-LOCAL socket)
                (MULTIPLE-VALUE-BIND (remote-host remote-port) (SOCKET:SOCKET-STREAM-PEER socket)
                  (FORMAT T "~&Connection: ~S:~D -- ~S:~D~%"
                          remote-host remote-port local-host local-port)))

corehello

package main

import (
 "net/http"
 "fmt"
 "html"
 "regexp"
 "log"
 "os"
 "time"

corehello

#generate CA self-signed certificate
openssl genrsa -out private\ca.key -rand private\.rnd -des 2048
openssl req -new -x509 -days 3650 -key private\ca.key -out private\ca.crt -config openssl.cnf
openssl x509 -in private\ca.crt -noout -text
 
#generate server certificate
openssl genrsa -out private\server.key 1024
openssl req -new -key private\server.key -out newcerts\server.csr -config openssl.cnf
openssl ca -in newcerts\server.csr -cert private\ca.crt -keyfile private\ca.key
-config openssl.cnf -policy policy_anything -out certs\server.crt

corehello

Graphics File Formats

This topic describes the graphics-file formats used by the Microsoft Windows
operating system. Graphics files include bitmap files, icon-resource files,
and cursor-resource files.

Bitmap-File Formats

Windows bitmap files are stored in a device-independent bitmap (DIB) format
that allows Windows to display the bitmap on any type of display device. The

corehello

(defun reproduce (population) 
  (let ((offspring nil) 
        (d (distribution population))) 
    (dotimes (i (/ (length population) 2)) 
      (let ((x (selectone d)) 
            (y (selectone d))) 
        (crossover x y) 
        (setq offspring (nconc (list x y) offspring)))) 
    offspring))

corehello

; The code in this file was mechanically extracted from the TeX
; source files of _Ansi Common Lisp_, except for bst-remove and
; bst-delete and their subroutines, which replace broken versions
; in the book.

; If you have questions or comments about this code, or you want
; something I didn't include, send mail to lispcode@paulgraham.com.

; This code is copyright 1995 by Paul Graham, but anyone who wants
; to use it is free to do so.

corehello

package main

import (
	"log"
	"net/http"
	"os"
)

func Log(handler http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {

corehello

Latency Comparison Numbers
--------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD