Scott Chen rightson
rightson
/ check-point-in-tringle.py
Last active
December 14, 2015 13:59
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| # -*- coding: utf-8 -*- | |
| def cross_product(p1, p2, p3): | |
| return ((p1[0] - p3[0]) * (p2[1] - p3[1])) - ((p2[0] - p3[0]) * (p1[1] - p3[1])) | |
| def point_in_triangle(s, p1, p2, p3): | |
| b1 = cross_product(s, p1, p2) < 0 | |
| b2 = cross_product(s, p2, p3) < 0 |
rightson
/ Quaternion-number-operation-demo.py
Last active
December 14, 2015 13:59
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| # -*- coding: utf-8 -*- | |
| class QuaternionNumber: | |
| def __init__(self, r, i, j, k): | |
| self.r = r | |
| self.i = i | |
| self.j = j | |
| self.k = k |
rightson
/ simple-pinterest-crawler-example.py
Created
March 6, 2013 08:47
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| # -*- coding: utf-8 -*- | |
| import pycurl | |
| from BeautifulSoup import BeautifulSoup | |
| class BruteFrocePinterestCrawler: | |
| def __init__(self): | |
| self.content = '' | |
| self.url = '' |
rightson
/ reference-member-is-dangerous.cpp
Last active
October 22, 2015 06:30
Take care of your member reference variables
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| #include <iostream> | |
| #include <string> | |
| class Person { | |
| public: | |
| Person(std::string& reference): _reference(reference) {} | |
| std::string name() { return _reference; } | |
| private: | |
| std::string &_reference; | |
| }; |
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| // ping.c | |
| int main() | |
| { | |
| // ... | |
| main_loop(icmp_sock, packet, packlen); | |
| } | |
| // ping_common.c | |
| void main_loop(int icmp_sock, __u8 *packet, int packlen) | |
| { |
rightson
/ set-screen.sh
Created
March 3, 2016 06:12
Add/set screen Full HD resolution on Ubuntu running in VMWare
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| #!/bin/sh | |
| xrandr --newmode "1920x1080" 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync | |
| xrandr --addmode Virtual1 1920x1080 | |
| xrandr --output Virtual1 --mode 1920x1080 |
rightson
/ Effective-C++_Item_23.cpp
Last active
March 23, 2016 05:18
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| class WebBrowser { | |
| public: | |
| // ... | |
| void clearCache(); | |
| void clearHistory(); | |
| void removeCookies(); | |
| // ... | |
| }; | |
| class WebBrowser { |
rightson
/ div_u64_rem.c
Created
March 29, 2016 15:33
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| #include <stdio.h> | |
| typedef unsigned int u32; | |
| typedef unsigned long u64; | |
| static inline u64 div_u64_rem(u64 dividend, u32 divisor, u32 *remainder) | |
| { | |
| union { | |
| u64 v64; | |
| u32 v32[2]; | |
| } d = { dividend }; |
rightson
/ create-jos-env.sh
Last active
May 20, 2016 22:33
A script for creating development environment for MIT JOS
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| export PFX=$HOME/jos-env | |
| #export PATH=$PFX/bin:$PATH | |
| #export LD_LIBRARY_PATH=$PFX/lib:$LD_LIBRARY_PATH # On Linux, use LD_LIBRARY_PATH | |
| #export DYLD_LIBRARY_PATH=$PFX/lib:$DYLD_LIBRARY_PATH # On Mac OS X, use DYLD_LIBRARY_PATH | |
| export GPM=gmp-5.0.2 | |
| export MPFR=mpfr-3.1.2 | |
| export MPC=mpc-0.9 | |
| export BINUTILS=binutils-2.21.1 | |
| export GCCCORE=gcc-core-4.6.3 |
rightson
/ virtualbox-patch-for-installing-osx.sh
Last active
May 20, 2016 21:44
virtualbox patch for installing OS X
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| VBoxManage modifyvm "OS X 10.11" --cpuidset 00000001 000306a9 04100800 7fbae3ff bfebfbff | |
| VBoxManage setextradata "OS X 10.11" "VBoxInternal/Devices/efi/0/Config/DmiSystemProduct" "MacBookPro11,3" | |
| VBoxManage setextradata "OS X 10.11" "VBoxInternal/Devices/efi/0/Config/DmiSystemVersion" "1.0" | |
| VBoxManage setextradata "OS X 10.11" "VBoxInternal/Devices/efi/0/Config/DmiBoardProduct" "Mac-2BD1B31983FE1663" | |
| VBoxManage setextradata "OS X 10.11" "VBoxInternal/Devices/smc/0/Config/DeviceKey" "ourhardworkbythesewordsguardedpleasedontsteal(c)AppleComputerInc" | |
| VBoxManage setextradata "OS X 10.11" "VBoxInternal/Devices/smc/0/Config/GetKeyFromRealSMC" 1 |