Lecture 1: Introduction to Research — [📝Lecture Notebooks] [
Lecture 2: Introduction to Python — [📝Lecture Notebooks] [
Lecture 3: Introduction to NumPy — [📝Lecture Notebooks] [
Lecture 4: Introduction to pandas — [📝Lecture Notebooks] [
Lecture 5: Plotting Data — [📝Lecture Notebooks] [[
Latency Comparison Numbers (~2012) | |
---------------------------------- | |
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 |
MIT License | |
Copyright (c) 2018 Oleg Yamnikov | |
Permission is hereby granted, free of charge, to any person obtaining a copy | |
of this software and associated documentation files (the "Software"), to deal | |
in the Software without restriction, including without limitation the rights | |
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
copies of the Software, and to permit persons to whom the Software is | |
furnished to do so, subject to the following conditions: |
For a brief user-level introduction to CMake, watch C++ Weekly, Episode 78, Intro to CMake by Jason Turner. LLVM’s CMake Primer provides a good high-level introduction to the CMake syntax. Go read it now.
After that, watch Mathieu Ropert’s CppCon 2017 talk Using Modern CMake Patterns to Enforce a Good Modular Design (slides). It provides a thorough explanation of what modern CMake is and why it is so much better than “old school” CMake. The modular design ideas in this talk are based on the book [Large-Scale C++ Software Design](https://www.amazon.de/Large-Scale-Soft
I recently had the following problem:
- From an unattended shell script (called by Jenkins), run a command-line tool that accesses the MySQL database on another host.
- That tool doesn't know that the database is on another host, plus the MySQL port on that host is firewalled and not accessible from other machines.
We didn't want to open the MySQL port to the network, but it's possible to SSH from the Jenkins machine to the MySQL machine. So, basically you would do something like
ssh -L 3306:localhost:3306 remotehost
Generate the list yourself:
$ cd /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS*.sdk/System/Library/Frameworks/UIKit.framework/Headers
$ grep UI_APPEARANCE_SELECTOR ./* | \
sed 's/NS_AVAILABLE_IOS(.*)//g' | \
sed 's/NS_DEPRECATED_IOS(.*)//g' | \
sed 's/API_AVAILABLE(.*)//g' | \
sed 's/API_UNAVAILABLE(.*)//g' | \
sed 's/UI_APPEARANCE_SELECTOR//g' | \
socat - udp4-listen:8125,fork | tee >(socat - udp-sendto:127.0.0.1:8135) >(socat - udp-sendto:127.0.0.1:8140) |
/* | |
g++ main.cpp -lboost_system -lboost_thread -lpthread -o main | |
*/ | |
#include <boost/asio.hpp> | |
#include <boost/array.hpp> | |
#include <iostream> | |
void send_something(std::string host, int port, std::string message) |
;; Display all the monospace fonts available to Emacs in a dedicated buffer | |
(defun font-is-mono-p (font-family) | |
;; with-selected-window | |
(let ((wind (selected-window)) | |
m-width l-width) | |
(with-temp-buffer | |
(set-window-buffer (selected-window) (current-buffer)) | |
(text-scale-set 4) | |
(insert (propertize "l l l l l" 'face `((:family ,font-family)))) |