LeetCode 133: Clone Graph

Title: Given undirected connected A reference to one of the nodes in the graph, returning the deep copy (clone).Each node in the graph contains its value val (Int) and a list of its neighbors (list[Node]). Given a reference of a node in a connected undirected graph, return a deep copy (clone) of the graph. Each node in the graph contains a val ...

Posted on Sun, 18 Aug 2019 17:10:37 -0700 by mmorton

[Spring cloud realizes advertising system step by step] 20. System running test

System operation After a long time of coding implementation, our main module has been basically completed, because before we are scattered on the various micro-services self-test, next, we need to all service modules for debugging testing, Let's do it. Clear Test Data & Test Files In the process of implementing various services, we add a lo ...

Posted on Sun, 18 Aug 2019 08:01:58 -0700 by andrewmay67

Write a compiler from scratch: the data structure of the symbol table for semantic analysis

The complete code for the project is C2j-Compiler Preface The files about the symbol table are in the symboltable package. Previously, we constructed a parsing table by completing a LALR(1) finite state automaton and a reduce information, and formally completed the parsing of C language. The next step is to enter the Semantic Analysis secti ...

Posted on Sun, 18 Aug 2019 06:47:49 -0700 by py343

Groovy Grammar Foundation

Introduction to Groovy Groovy is a dynamic language based on JVM. Its grammar is similar to Java and ultimately compiles. class to run on JVM. Groovy is fully compatible with Java and adds many dynamic types and flexible features, such as closure support and DSL support. Groovy is a very flexible dynamic scripting language. The purpose of this ...

Posted on Sun, 18 Aug 2019 06:42:23 -0700 by raydar2000

Get rid of date format altogether

(1) Date category [Date] (1) The imported package is "import java.util.Date;" (2) Since version 1.1 of JDK, many constructions in date classes have been discarded. Only the parametric constructions and the parametric constructions wi ...

Posted on Sun, 18 Aug 2019 06:09:19 -0700 by thumrith

Definition and Use of Three Directives of JSP/Servlet|| jsp

JSP Directive The instruction in the JSP page is how the JSP page notification engine handles its own information. Grammatical Format: <%@ directive attribute = "value" %> Instructions can have many attributes, which exist as key-value ...

Posted on Sun, 18 Aug 2019 03:52:56 -0700 by Entanio

[Learning Notes - Java Collection - 13] Set - Concurrent SkipListSet Source Analysis

introduce The bottom layer of Concurrent SkipListSet is implemented through Concurrent Navigable Map, which is an orderly set of thread security. Source code analysis Its source code is relatively simple, basically the same as the Set implemented through Map, but there are some more ways to get the nearest element. // The Navigable Set interfa ...

Posted on Sun, 18 Aug 2019 02:08:13 -0700 by bluwe

[Learning Notes - Java Collection - 11] Map - Concurrent SkipListMap Source Analysis

introduce Jump table is a randomized data structure, which is essentially an ordered linked list that can be searched by dichotomy. The jump table adds a multi-level index to the original ordered list to achieve fast search through the index. Jump table can not only improve search performance, but also improve the performance of insert and dele ...

Posted on Sun, 18 Aug 2019 01:13:38 -0700 by luxe

springboot 2.1.7 + mysql5.6 Discard Calendar type field

Reason: When using Calendar as the field type, each findById() operation returns a slightly larger value than the actual value.The query will be invoked after the update and will be larger.That is, if we use Calendar as the field type, the field will quietly grow when the program runs. Code preparation The sample code is simple: we only need to ...

Posted on Sat, 17 Aug 2019 19:18:39 -0700 by mie

Flink's checkpoint tuning in large-scale state datasets

50,000 people are interested in the road to big data, don't you know?Do you really not know the way 50,000 people care about big data becoming a god?Are you sure you really don't know the way 50,000 people are focusing on big data? Welcome to your attention The Way to Big Data Today I received a question from a classmate, which is probably: Fl ...

Posted on Sat, 17 Aug 2019 10:38:35 -0700 by markbeadle