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13 valuable things I learned using CMake

Author : Dua Guillaume
Date : 04-26-2020

Requirement : A first experience with CMake

Intro

As a modern C++ specialist, my job is to focus on software development, from a performance and quality perspective.

Why COW was deemed ungood for std::string.

COW, short for copy on write, is a way to implement mutable strings so that creating strings and logically copying strings, is reduced to almost nothing; conceptually they become free operations like no-ops.

Basic idea: to share a data buffer among string instances, and only make a copy for a specific instance (the copy on write) when that instance's data is modified. The general cost of this is only an extra indirection for accessing the value of a string, so a COW implementation is highly desirable. And so the original C++ standard, C++98, and its correction C++03, had special support for COW implementations, and e.g. the g++ compiler's std::string implementations used COW.

So why was that support dropped in C++11?

In particular, would the same reason or reasons apply to a reference counted immutable string value class?

Problem

Bulk Download of Recordings and Gallery items

Solution

Write a simple script

How to use the script

Login to mi cloud https://i.mi.com
Navigate to https://us.i.mi.com/#record or https://us.i.mi.com/v1#gallery
In web browser (Chrome) press F12 to open Chrome developer tool

Edit: This list is now maintained in the rust-anthology repo.

Introduction
Ownership
- Where Rust Really Shines
- Rust Means Never Having to Close a Socket
The Problem with Single-threaded Shared Mutability

git commit stats

Commands to get commit statistics for a Git repository from the command line -
using git log, git shortlog and friends.

What / Why

Deploy key is a SSH key set in your repo to grant client read-only (as well as r/w, if you want) access to your repo.

As the name says, its primary function is to be used in the deploy process in replace of username/password, where only read access is needed. Therefore keep the repo safe from the attack, in case the server side is fallen.

How to

Generate a ssh key

	%%-----------------------------------------------------------------------
	%% Make your own quadrille, graph, hex, etc paper!
	%% Uses the pgf/TikZ package for LaTeX, which should be part of
	%% any modern TeX installation.
	%% Email: [email protected]
	%% Twitter: @mcnees
	%%-----------------------------------------------------------------------

	\documentclass[11pt]{article}

	import JSON
	###################
	### Write data ####
	###################
	# dictionary to write
	dict1 = Dict("param1" => 1, "param2" => 2,
	"dict" => Dict("d1"=>1.,"d2"=>1.,"d3"=>1.))

	# pass data as a json string (how it shall be displayed in a file)
	stringdata = JSON.json(dict1)

	py_binary(
	name = 'generate_compile_command',
	srcs = [
	'generate_compile_command.py',
	],
	deps = [
	'//third_party/bazel:extra_actions_proto_py',
	],
	)

	#!/usr/bin/env sh

	sudo update-alternatives --install \
	/usr/bin/llvm-config llvm-config /usr/bin/llvm-config-3.6 200 \
	--slave /usr/bin/llvm-ar llvm-ar /usr/bin/llvm-ar-3.6 \
	--slave /usr/bin/llvm-as llvm-as /usr/bin/llvm-as-3.6 \
	--slave /usr/bin/llvm-bcanalyzer llvm-bcanalyzer /usr/bin/llvm-bcanalyzer-3.6 \
	--slave /usr/bin/llvm-cov llvm-cov /usr/bin/llvm-cov-3.6 \
	--slave /usr/bin/llvm-diff llvm-diff /usr/bin/llvm-diff-3.6 \
	--slave /usr/bin/llvm-dis llvm-dis /usr/bin/llvm-dis-3.6 \