1140 1141 1142 1143 Simulated Exercise

1140 Look-and-say Sequence (20 points) Sample Input: 1 8 Sample Output: 1123123111 Note 1 11 12 1121 122111 112213 12221131 1123123111 Implication: Without a change, use a number to record the number of times that have occurred before. Idea: Ma ...

Posted on Sat, 17 Aug 2019 04:31:16 -0700 by iFlex

[Learning Notes - Java Collection - 10] Set - LinkedHashSet Source Analysis

introduce In the previous section, we said that elements in HashSet are disordered, so is there any way to ensure that elements in Set are ordered? The answer is, of course. LinkedHashSet has this function. How does it achieve orderliness? Source code analysis LinkedHashSet inherits from HashSet, so let's go directly to the source code to see h ...

Posted on Sat, 17 Aug 2019 04:06:15 -0700 by alexvgtb

[Learning Notes - Java Collection - 9] Set - HashSet Source Analysis

brief introduction Set, the concept is a little vague. Generally speaking, collections in Java refer to container classes under the java.util package, including all classes related to Collection and Map. Generally speaking, collections refer to Collection-related classes in java collections, not Map-related classes. In a narrow sense, a Set in ...

Posted on Sat, 17 Aug 2019 03:52:47 -0700 by mannyee

Complete the memory game in JavaScript in 30 minutes

Learn JS, CSS and HTML by building a memory game in 30 minutes! This tutorial introduces some basic concepts about HTML5, CSS3 and JavaScript. We will discuss data attributes, location, perspective, transformation, flexbox, event handling, timeouts, and ternary expressions. You don't need a lot of programming knowledge to read this article. If ...

Posted on Sat, 17 Aug 2019 03:47:53 -0700 by jingato

[Fast SpringBoot] Filter XSS script attacks (including json format)

What is an XSS attack? XSS attack, which is called cross-site scripting attack, is to avoid confusion with the abbreviation of Cascading Style Sheets (CSS). Therefore, cross-site scripting attack is abbreviated as XSS. XSS is a computer security v ...

Posted on Sat, 17 Aug 2019 02:28:59 -0700 by Daggeth

SQL Alchemy of Python Full Stack Road Series

SQL Alchemy is a Python SQL toolkit and object relational mapper that allows application developers full functionality and SQL flexibility. It provides a complete set of well-known enterprise-level persistence patterns, specifically for efficient and ...

Posted on Sat, 17 Aug 2019 02:18:37 -0700 by danoli3

Sparse Array of Data Structure Algorithms

Data Structure and Algorithms I. Linear and Nonlinear Structures Data structure includes linear structure and non-linear structure. 1. Linear structure (1) As the most commonly used data structure, linear structure is characterized by one-to-one ...

Posted on Sat, 17 Aug 2019 02:10:53 -0700 by ericorx

Buffer Stream 04_Buffer Stream Efficiency Test_Copy Files

package com.itheima.demo02.CopyFile; import java.io.*; /* Document Copy Exercise: Read and Write To make clear: Data source: c:\1.jpg Destination of data: d:\1.jpg Steps for file replication: 1. Create byte buffer input stream object and pass byte input stream in construction method 2. Create byte buffer output stream object a ...

Posted on Sat, 17 Aug 2019 01:10:25 -0700 by Mow

Provinces of WPF Inquiry Telephone

Author: Sun Yingpeng Writing Time: 17 August 2019 Today I'm going to talk about the boring thing that happened to me when I was working on a project. That is to enter the telephone number and then show the province where the telephone number belong ...

Posted on Sat, 17 Aug 2019 00:37:31 -0700 by unidox

LEETCODE (21-30) OF JS ALGORITHM PROBLEMS

Topics come from leetcode Merge two ordered lists Topic Description Merge the two ordered lists into a new ordered list and return. The new linked list is composed of all the nodes of a given two linked list. Example Input: 1 - > 2 - > 4, 1 - > 3 - > 4 Output: 1 - > 1 - > 2 - > 3 - > 4 - > 4 Answer This problem is no ...

Posted on Sat, 17 Aug 2019 00:29:21 -0700 by vboctor