SQLite Explan: Why the Most Popular Accounts Query is Slow compa

  • 时间：2020-09-08 11:08:55
  • 分类：网络文摘
  • 阅读：105 次
Similarly to Most Blocks Accounts on Steem Blockchain I was going to have a page that lists the most popular accounts (most followed). However, after analysis, I decide to pause it because the query to get the most popular accounts is very ... ...

Deep Clone N-ary Tree using Hash Map + Recursive Depth First Sea

  • 时间：2020-09-08 11:08:55
  • 分类：网络文摘
  • 阅读：112 次
Given a root of an N-ary tree, return a deep copy (clone) of the tree. Each node in the n-ary tree contains a val (int) and a list (List[Node]) of its children. 1 2 3 4 class Node {     public int val;     public... ...

Set Up Website Health Checks (Canaries) using CloudFlare

  • 时间：2020-09-08 11:08:55
  • 分类：网络文摘
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In Software Testing, the Canaries is a piece of code that continuous sends requests to check the health of the service. It is like back in Coral mining, the canries are sent to the mine and if something goes wrong, the canaries will stop tw... ...

IoT Security: Real Problems and Solutions

  • 时间：2020-09-08 11:08:55
  • 分类：网络文摘
  • 阅读：130 次
By 2025, there will be more than 75 billion devices connected to the web. While many of these will be smartphones, tablets, and computers, the vast majority of these connections will be IoT (Internet-of-Things) devices. IoT devices are eve... ...

Using Java’s Big Integer to Compute the Large Sum of One-h

  • 时间：2020-09-08 11:08:55
  • 分类：网络文摘
  • 阅读：107 次
Work out the first ten digits of the sum of the following one-hundred 50-digit numbers. 37107287533902102798797998220837590246510135740250 46376937677490009712648124896970078050417018260538 7432498619952474105947423330951305812372661730962... ...

How do you Test Getter and Setter Interface in Java using Mockit

  • 时间：2020-09-08 11:08:55
  • 分类：网络文摘
  • 阅读：104 次
Usually, we unit tests the logics. An interface is without implementation details. A interface is just a binding a contract, but still, we can use Mockito to mock the interface, and test it. For example, given the following simple Setter an... ...

How to SSH to Remote Host using the Priviate/Public Keys Authent

  • 时间：2020-09-08 11:08:55
  • 分类：网络文摘
  • 阅读：100 次
Password Authentication is not secure. Your password may be too simple to crack or acidentally may be recorded or leaked. Therefore, it is a good practice to configure the authentication without using Password. SSH using Public/Private Key ... ...

Can We Make Arithmetic Progression From Sequence of Numbers?

  • 时间：2020-09-08 11:08:55
  • 分类：网络文摘
  • 阅读：125 次
Given an array of numbers arr. A sequence of numbers is called an arithmetic progression if the difference between any two consecutive elements is the same. Return true if the array can be rearranged to form an arithmetic progression, othe... ...

Efficient Algorithms to Compute The kth Factor of a Natural Numb

  • 时间：2020-09-07 13:13:13
  • 分类：网络文摘
  • 阅读：117 次
Given two positive integers n and k. A factor of an integer n is defined as an integer i where n % i == 0. Consider a list of all factors of n sorted in ascending order, return the kth factor in this list or return -1 if n has less than k ... ...

Function to Compute the Average Salary Excluding the Minimum and

  • 时间：2020-09-07 13:13:13
  • 分类：网络文摘
  • 阅读：131 次
Given an array of unique integers salary where salary[i] is the salary of the employee i. Return the average salary of employees excluding the minimum and maximum salary. Example 1: Input: salary = [4000,3000,1000,2000] Output: 2500.00000 ... ...