Skip to content

Instantly share code, notes, and snippets.

View jdeng's full-sized avatar

Jack jdeng

313 followers · 0 following
  • USA
View GitHub Profile
@jdeng
jdeng / test.go
Created July 25, 2020 04:27
restic + rclone as a library example
package main
import (
"bytes"
"context"
"flag"
"fmt"
// "os"
"path"
@jdeng
jdeng / convert.go
Created October 20, 2017 05:49
Save Outlook mail to MIME format using golang
// +build windows
package main
import (
"fmt"
"time"
"syscall"
"unsafe"
@jdeng
jdeng / pdf2img.html
Created February 11, 2015 02:54
pdf to image using pdf.js
<html>
<body>
<script type="text/javascript" src="//mozilla.github.io/pdf.js/build/pdf.js"></script>
<script type="text/javascript">
var url = "https://docs.google.com/document/export?format=pdf&id=1ML11ZyyMpnAr6clIAwWrXD53pQgNR-DppMYwt9XvE6s&token=AC4w5Vg7fSWH1Hq0SgNckx4YCvnGPaScyw%3A1423618416864";
var pages = [], heights = [], width = 0, height = 0, currentPage = 1;
var scale = 1.5;
function draw() {
@jdeng
jdeng / Pass.java
Created September 29, 2014 00:02
Pass
import java.util.Map;
import java.math.BigInteger;
import java.security.MessageDigest;
import java.io.*;
public class Pass
{
public static void main(String[] arg)
{
try {
@jdeng
jdeng / sparse_set.h
Created July 31, 2014 05:17
Sparse set
#pragma once
// Using Uninitialized Memory for Fun and Profit
// http://research.swtch.com/sparse
#include <vector>
class SparseSet
{
private:
size_t n_;
std::vector<uint32_t> dense_, sparse_;
@jdeng
jdeng / println
Created July 9, 2014 01:06
to_string & println with variadic templates
template< class S> void print_with(S& s, char delim) {}
template< class S, typename T> void print_with(S& s, char delim, const T& t) { s<<t; }
template <class S, typename T, typename... Args> void print_with(S& s, char delim, const T& t, const Args& ...args) { s << t; if (delim) s << delim; print_with(s, delim, args...); }
template <typename... Args>
std::string to_string_with(char delim, const Args& ...args) { std::stringstream ss; print_with(ss, delim, args...); return ss.str(); }
template <typename... Args> std::string to_string(const Args& ...args) { return to_string_with('\x00', args...); }
template <typename... Args> std::ostream& print(std::ostream& out, const Args& ...args) { print_with(out, '\x00', args...); return out;}
template <typename... Args> std::ostream& println(std::ostream& out, const Args& ...args) { print_with(out, '\x00', args...); out << std::endl; return out;}
@jdeng
jdeng / cluster
Last active June 17, 2020 02:52
clustering by fast search and find of density peak
// generate [0..n-1]
auto seq = [](size_t n) -> std::vector<size_t> {
std::vector<size_t> v(n);
for (size_t i=0; i<n; ++i) v[i] = i;
return v;
};
auto index = seq(n);
// n * n distance matrix
std::vector<D> dists(n * n);
@jdeng
jdeng / quickfix.js
Created December 25, 2013 22:08
// command line
//"/System/Library/Automator/Combine PDF Pages.action/Contents/Resources/join.py" -o js.pdf 0*.pdf
//quickfix css for angularjs.cn for printing
['ul.pagination', '.aside', '.footer', 'ul.user', '#comments', '#cnzz_stat_icon_1000062427'].forEach(function(e) {$(e).hide();});
$('.pure-u-2-3').css("width", "100%");
$('#main').css("background-color","#ffffff");
$('pre.prettyprint').css('background-color', '#aaaaaa');
$('.panel').css('-webkit-box-shadow', 'none');
@jdeng
jdeng / error_code.hpp
Created December 19, 2013 20:32
Using std::error_code etc to replace boost's in /usr/local/Cellar/boost/1.54.0/include/boost/system/. You'll need to use an empty system_error.hpp and possibly specialize is_error_code_enum in namespace std::.
#pragma once
#include <system_error>
namespace boost { namespace system {
using error_category = std::error_category;
using error_code = std::error_code;
using error_condition = std::error_condition;
using system_error = std::system_error;
using errc = std::errc;
using std::system_category;
@jdeng
jdeng / seq.hh
Created December 12, 2013 19:24
integer sequence c++ 11
//copied from http://stackoverflow.com/questions/17424477/implementation-c14-make-integer-sequence
template<int...> struct seq { using type = seq; };
template<typename T1, typename T2> struct concat;
template<int... I1, int... I2> struct concat<seq<I1...>, seq<I2...>>: seq<I1..., (sizeof...(I1) + I2)...> {};
template<int N> struct gen_seq;
template<int N> struct gen_seq: concat<typename gen_seq<N/2>::type, typename gen_seq<N-N/2>::type>::type {};
template <> struct gen_seq<0>: seq<>{};
template <> struct gen_seq<1>: seq<0>{};