bootjp

JavaScript練習問題集

更新情報

・問題を追加(2020/4/18)
・表記揺れを整理(2020/1/13)
・TypeScript問題集のリンク追加(2019/7/13)

bootjp

document.querySelectorAll('img[src*="https://pbs.twimg.com/media/"]').forEach(function(ele) {
  // 最初の要素はformatがついていないので
  let index = ele.src.indexOf('?');
  let url;
  if (index !== -1) {
    url = ele.src.substr(0, index)
  } else {
    url = ele.src
  }
  url += '?format=png&name=4096x4096';

bootjp

If you want to use multiple dbs at once there are several different ways... 

1) If you want to do this on a per-model level, use .store_in (This is for all threads):

class Band
  include Mongoid::Document
  store_in database: "secondary" # This can be any name you want, no need to put it in the mongoid.yml.
end

class Artist

bootjp

package main

import (
	"log"
	"testing"

	"github.com/google/uuid"
)

func uuidString() string {

bootjp

Oculus Rift + Vive Trackers setup

It's recommend to use the Vive Trackers 2018 since they have less interference with the Oculus Touch controllers. Also some of the steps are only necessary for the moment because of some bugs and broken tools.

I recommend you to join this Discord server if you have any questions: https://discord.gg/bkRgTVw. You can also check this document for fixes to some common issues.

Written by Ind3x. Thanks to Dj Lukis.LT and Kaori for several additional hints.

1. Install SteamVR, start it and finish the tutorial if necessary
2. Open the file Steam\config\steamvr.vrsettings with Windows' Notepad and add the following to the beginning of the steamvr section. Click here to see a short video on how to do that.

bootjp

Latency Comparison Numbers
--------------------------
L1 cache reference/hit                       1.5 ns                      4 cycles
Floating-point add/mult/FMA operation        1.5 ns                      4 cycles
L2 cache reference/hit                       5   ns                      12 ~ 17 cycles
Branch mispredict                            6   ns                      15 ~ 20 cycles
L3 cache hit (unshared cache line)          16   ns                      42 cycles
L3 cache hit (shared line in another core)  25   ns                      65 cycles
Mutex lock/unlock                           25   ns
L3 cache hit (modified in another core)     29   ns                      75 cycles

bootjp

using System;
using System.Collections.Generic;
using Newtonsoft.Json;

namespace csharp
{
    class Program
    {
        static void Main(string[] args)
        {

bootjp

import numpy as np
import random
import math
import cv2
from PIL import Image

def detect_markers(im):
 markers = []
 # 輪郭線抽出のための二値化
 im_gray = cv2.cvtColor(im, cv2.COLOR_BGR2GRAY)

bootjp

#!/bin/bash

# Author: Erik Kristensen
# Email: [email protected]
# License: MIT
# Nagios Usage: check_nrpe!check_docker_container!_container_id_
# Usage: ./check_docker_container.sh _container_id_
#
# Depending on your docker configuration, root might be required. If your nrpe user has rights
# to talk to the docker daemon, then root is not required. This is why root privileges are not

bootjp

package main

import (
	"context"
	"flag"
	"fmt"
	"log"
	"net/http"
	"os"
	"os/signal"