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1. https://developer.apple.com/download/all
2. https://xcodereleases.com/
3. https://github.com/phracker/MacOSX-SDKs

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if &compatible
  set nocompatible               " Be iMproved
endif

set number
set confirm
set autoread
set spell
set clipboard+=unnamed
set mouse+=a

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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?

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use std;
use std::env;
use std::fs;
use std::io::Write;

use nix::mount;
use nix::sched;
use nix::sched::CloneFlags;
use nix::sys::signal::Signal;
use nix::sys::wait::waitpid;

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use std::env;

use nix::sched;
use nix::sched::CloneFlags;
use nix::sys::signal::Signal;
use nix::sys::wait::waitpid;
use nix::unistd;
use cgroups_rs as cgroup;
use cgroups_rs::{Cgroup};
use cgroups_rs::cgroup_builder::{CgroupBuilder};

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#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import gc


def list_live_objects(ty=None):
    def go(results, elements, bitset):
        for elem in elements:
            identity = id(elem)

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ffmpeg

Converting Audio into Different Formats / Sample Rates

Minimal example: transcode from MP3 to WMA:
ffmpeg -i input.mp3 output.wma

You can get the list of supported formats with:
ffmpeg -formats

Convert WAV to MP3, mix down to mono (use 1 audio channel), set bit rate to 64 kbps and sample rate to 22050 Hz:

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Build LLVM/Clang Docset

1. Modify LLVM/Clang doxygen.config.in

   • GENERATE_DOCSET = YES
   • DISABLE_INDEX = YES
   • SEARCHENGINE = NO
   • GENERATE_TREEVIEW = NO
   • GENERATE_TAGFILE =

• LLVM: @abs_top_builddir@/doxygen/llvm(clang).tag

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(* set geography data server *)
server := "http://www.staremapy.cz/naturalearth/`1`/`2`/`3`.png"

(* plot *)
GeoGraphics[{GeoStyling[Opacity[0.5], GeoServer -> server], 
  NightHemisphere[]}, 
 GeoBackground -> GeoStyling["ReliefMap", GeoServer -> server]]

(* more simple graph *)
GeoGraphics[{NightHemisphere[Now], Red, Point[$GeoLocation]}]

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#include <assert.h>
#include <libcgroup.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>

#define _GNU_SOURCE
#include <unistd.h>