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#!/bin/bash

GREETINGS='HELLO GROOVY AND BASH'

echo $GREETINGS

#to interpret bash variable , remove single quotes in 'EOF'
groovy -e "new GroovyShell().evaluate(System.in.text)" <<'EOF'
println("this is groovy print")
EOF

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//turn list into map
assert [1:2,3:4] == [[1,2],[3,4],[1,2]].collectEntries {it}  //{[it[0],it[1]]}

//sublist from nth to end
assert [3,4,5,6] == [1,2,3,4,5,6][2..-1]
assert [3,4,5,6] == [1,2,3,4,5,6][2, 3..-1]

//string to number
assert 1.2 == "1.2" as double

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curl -s -b "$cookie" "https://class.coursera.org/bitcointech-001/lecture" | grep download.mp4\?lecture_id | awk -F\" '{print $4}' | xargs curl -s -b "$cookie" | awk -F\" '{print $2}' | while read -r line; do wget --content-disposition "$line" ;done

while read -r line; do wget --content-disposition "$line"; done

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package com.surdoc.enterprisecloud.web;

import java.io.IOException;
import java.net.URLDecoder;
import java.net.URLEncoder;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;

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@Test
public String readMailTest() throws Exception {

	Properties props = new Properties();
	props.put("mail.imap.host", "imap.sina.cn");
	Session session = Session.getDefaultInstance(props);
	IMAPStore store = (IMAPStore) session.getStore("imap");
	store.connect("sgmall_test_001", "sgmall_test_001");

	Folder emailFolder = store.getFolder("INBOX");

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deb http://ubuntu.v2ex.com/ubuntu/ quantal main restricted universe multiverse
deb-src http://ubuntu.v2ex.com/ubuntu/ quantal main restricted universe multiverse
deb http://ubuntu.v2ex.com/ubuntu/ quantal-updates main restricted universe multiverse
deb-src http://ubuntu.v2ex.com/ubuntu/ quantal-updates main restricted universe multiverse
deb http://ubuntu.v2ex.com/ubuntu/ quantal-backports main restricted universe multiverse
deb-src http://ubuntu.v2ex.com/ubuntu/ quantal-backports main restricted universe multiverse
deb http://ubuntu.v2ex.com/ubuntu/ quantal-security main restricted universe multiverse
deb-src http://ubuntu.v2ex.com/ubuntu/ quantal-security main restricted universe multiverse
deb http://extras.ubuntu.com/ubuntu quantal main
deb-src http://extras.ubuntu.com/ubuntu quantal main

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// http://en.wikipedia.org/wiki/Variance
// http://upload.wikimedia.org/math/a/3/3/a336557f138eb90bafc9e6ebc00e926d.png

var data = [{x: 1, p: 0.1}, {x: 2, p: 0.3}, {x: 8, p: 0.6}]; //{x:probability}

var mu = 0, sigma = 0;
for (i in data) {
  mu += i.p * i.x;
  sigma += i.p * i.x * i.x;

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#!/bin/bash

# download video by providing video url and cookie.
# saved file name will be from Content-Disposition
function download() {
	local url=$1
	local cookies=$2

	local filename=$(curl -I -L -s --cookie "$cookies" "$url" | grep Content-Disposition | python -c "import sys, urllib as ul; print ul.unquote(sys.stdin.read());" | awk -F\" '{print $2}')
	echo "start to download $filename"