cpv

import subprocess, os, random, re
from Tkinter import *
from turtle import *
import turtle

def ping(host):
    process = os.popen("ping -c 1 -n -w 1 "+host, "r")
    output = process.read()
    if "unknown host" in output:
        print host+" | unknown | 0"

cpv

As of iOS 11/macOS High Sierra, and only including ones in Foundation and CoreFoundation

Strings:

_NSCFString - a CFStringRef or CFMutableStringRef. This is the most common type of string object currently.
    - May have 8 bit (ASCII) or 16 bit (UTF-16) backing store
_NSCFConstantString - a compile time constant CFStringRef, like you'd get with @"foo"
    - May also be generated by dynamic string creation if matches a string in a pre-baked table of common strings called the StringROM
NSBigMutableString - an NSString backed by a CFStorage (https://github.com/opensource-apple/CF/blob/master/CFStorage.h) for faster handling of very large strings
NSCheapMutableString - a very limited NSMutableString that allows for zero-copy initialization. Used in NSFileManager for temporarily wrapping stack buffers.

cpv

import SwiftUI

struct HarmonicButton: View {
  var body: some View {
    Button(
      action: {},
      label: {}
    )
    .frame(width: 240.0, height: 70.0)
    .buttonStyle(HarmonicStyle())