gubatron

#
# Author: Angel Leon (@gubatron)
# October 2nd 2018
#
#
# README:
#
# This CmakeLists.txt file is not meant to produce any executables or libraries.
#
# It has been created for CLion or any other cmake compatible IDE users so that they can

sanchezzzhak

SELECT table,
    formatReadableSize(sum(bytes)) as size,
    min(min_date) as min_date,
    max(max_date) as max_date
    FROM system.parts
    WHERE active
GROUP BY table

kantoniak

#include <chrono>
#include <ctime>
#include <iostream>

int main() {

  // std::chrono only
  auto now = std::chrono::system_clock::now();
  std::cout << "std::chrono only: " << std::chrono::duration_cast<std::chrono::seconds>(now.time_since_epoch()).count() << std::endl;

jingzhehu

cmake_minimum_required(VERSION 3.3)
project(bitcoin)

set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")

add_custom_target(build-bitcoin ALL
        COMMAND ./autogen.sh
        COMMAND ./configure
        COMMAND $(MAKE) WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}

fenbf

// SFINAE, enable_if example
// based on http://stackoverflow.com/questions/257288/is-it-possible-to-write-a-c-template-to-check-for-a-functions-existence


#include <iostream>
#include <type_traits>

class ClassWithToString
{
public:

myusuf3

To remove a submodule you need to:

• Delete the relevant section from the .gitmodules file.
• Stage the .gitmodules changes git add .gitmodules
• Delete the relevant section from .git/config.
• Run git rm --cached path_to_submodule (no trailing slash).
• Run rm -rf .git/modules/path_to_submodule (no trailing slash).
• Commit git commit -m "Removed submodule "
• Delete the now untracked submodule files rm -rf path_to_submodule

msrose

Combining two git repositories

Use case: You have repository A with remote location rA, and repository B (which may or may not have remote location rB). You want to do one of two things:

• preserve all commits of both repositories, but replace everything from A with the contents of B, and use rA as your remote location
• actually combine the two repositories, as if they are two branches that you want to merge, using rA as the remote location

NB: Check out git subtree/git submodule and this Stack Overflow question before going through the steps below. This gist is just a record of how I solved this problem on my own one day.

Before starting, make sure your local and remote repositories are up-to-date with all changes you need. The following steps use the general idea of changing the remote origin and renaming the local master branch of one of the repos in order to combine the two master branches.

dergachev

# taken from http://www.piware.de/2011/01/creating-an-https-server-in-python/
# generate server.xml with the following command:
#    openssl req -new -x509 -keyout server.pem -out server.pem -days 365 -nodes
# run as follows:
#    python simple-https-server.py
# then in your browser, visit:
#    https://localhost:4443

import BaseHTTPServer, SimpleHTTPServer
import ssl

balupton

Android Emulator

1. Download Android Studio
2. Create a virtual device: /Applications/Android\ Studio.app/sdk/tools/android create avd -n <name> -t 1
3. List your virtual devices: /Applications/Android\ Studio.app/sdk/tools/android list avd
4. Run your virtual device: /Applications/Android\ Studio.app/sdk/tools/emulator -avd basic

matthewmccullough

Git Compression of Blobs and Packfiles.

Many users of Git are curious about the lack of delta compression at the object (blob) level when commits are first written. This efficiency is saved until the pack file is written. Loose objects are written in compressed, but non-delta format at the time of each commit.

A simple run though of a commit sequence with only the smallest change to the image (in uncompressed TIFF format to amplify the observable behavior) aids the understanding of this deferred and different approach efficiency.

The command sequence:

Create the repo: