Pan Feng panfeng

Math For Programmers

Virtual Memory from 0 to n, map fromm virtual memory to physical memory

####Inside of Memory Location bit: 1/0

Memory Location: 8bits = 1byte Registers 64bits = 8bytes

	<?php
	function pre_print_r($var){
	echo "<pre>";
	print_r($var);
	echo "</pre>";
	}

	class Obj1 {
	public function __call($method,$arg){
	return $this; }}

	<?php

	function pre_print_r($var){
	echo "<pre>";
	print_r($var);
	echo "</pre>";
	echo "<br />";
	}
	/*
	http://www.w3school.com.cn/php/func_array_splice.asp

	<?php

	//php中php_array(1,$arr)只能查找出数组中第一次出现的$tofind;

	$arr = array(1,2,3,4,1,1,1,1);
	var_dump(array_search_all($arr,3));

	//返回 value符合的key所组成的数组；

	library(XML)

	#获取当前链接的所有评论
	get_one_page_comment<-function(url){

	html<-htmlParse(url)
	resnodes<-getNodeSet(html,"//div[@class='review-sec']//div[@class='inner']//div[@class='body']//p[@class='read']//span[@class='read-more']//a[@class='cmn-viewmore']")
	#获取当前页面中所有comment的长文链接
	comments_url<-NULL
	if(is.null(resnodes)){

	<!doctype html>
	<html>
	<head>
	<title>D3 tutorial</title>
	<script src="http://d3js.org/d3.v3.min.js"></script>
	</head>
	<body>
	<p> This a paragraph</p>
	<script>
	d3.json("./data.json",function(data){

	var xpath_query = '//ul/li/a';

	var xpath_obj = document.evaluate(xpath_query ,document, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null );

	var href_list = [];

	for (var m=0; m<xpath_obj.snapshotLength; m++){
	href_list[m] = xpath_obj.snapshotItem(m).getAttribute("href");
	}

	<!DOCTYPE html>
	<html>
	<head>
	<link type='text/css' rel='stylesheet' href='style.css'/>
	<title>More Coin Flips</title>
	</head>
	<body>
	<p>We will keep flipping a coin as long as the result is heads!</p>
	<?php
	$flipCount = 0;