sergeytimoshin

How to setup Let's Encrypt for Nginx on Ubuntu 18.04 (including IPv6, HTTP/2 and A+ SLL rating)

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Virtual hosts

Let's say you want to host domains first.com and second.com.

Create folders for their files:

sergeytimoshin

import LinkPresentation
import Combine

extension LPMetadataProvider {
    func startFetchingMetadataPublisher(for url: URL) -> AnyPublisher<LPLinkMetadata?, Error> {
        Future<LPLinkMetadata?, Error> { completion in
            self.startFetchingMetadata(for: url) { meta, error in
                guard let error = error else {
                    return completion(.success(meta))
                }

sergeytimoshin

#!/bin/bash

SPINE_VERSION="3.7.83"
ARCHS=("x86_64")
SDK_VERSION="10.14"

ROOT_DIR=$(pwd)
WORKER=$(getconf _NPROCESSORS_ONLN)
BUILD_DIR="build/macos/spine"
LOG_FILE="$ROOT_DIR/$BUILD_DIR/build.log"

sergeytimoshin

libdispatch efficiency tips

The libdispatch is one of the most misused API due to the way it was presented to us when it was introduced and for many years after that, and due to the confusing documentation and API. This page is a compilation of important things to know if you're going to use this library. Many references are available at the end of this document pointing to comments from Apple's very own libdispatch maintainer (Pierre Habouzit).

My take-aways are:

• You should create very few, long-lived, well-defined queues. These queues should be seen as execution contexts in your program (gui, background work, ...) that benefit from executing in parallel. An important thing to note is that if these queues are all active at once, you will get as many threads running. In most apps, you probably do not need to create more than 3 or 4 queues.

• Go serial first, and as you find performance bottle necks, measure why, and if concurrency helps, apply with care, always validating under system pressure. Reuse

sergeytimoshin

"""
Minimal character-level Vanilla RNN model. Written by Andrej Karpathy (@karpathy)
BSD License
"""
import numpy as np

# data I/O
data = open('input.txt', 'r').read() # should be simple plain text file
chars = list(set(data))
data_size, vocab_size = len(data), len(chars)

sergeytimoshin

#import <Foundation/Foundation.h>

// clang -g -Wall -framework Foundation -o atomic atomic.m
// gcc -g -Wall -framework Foundation -o atomic atomic.m

@interface Blah : NSObject
@property (assign, NS_NONATOMIC_IOSONLY) NSInteger frobnozzle;
@property (assign, ) NSInteger commaAtEnd;
// @property (, assign) NSInteger commaAtBeginning;  // Syntax error
@property (atomic, assign) NSInteger blah; // complains in gcc

sergeytimoshin

desc 'Remove unused images'
task :clean_assets do
  require 'set'

  all = Set.new
  used = Set.new
  unused = Set.new

  # White list
  used.merge %w{Icon Icon-29 Icon-50 Icon-58 Icon-72 Icon-114}