5 custom exception

Overview of custom exceptions When the exception in java can not meet the needs of developers, you can customize the exception. package com.monkey1024.exception; public class UserService { //Method of registration public void register(String name){ if(name.length()<6){ ...

Posted on Thu, 10 Oct 2019 13:24:42 -0700 by Kingy

A case study to understand the scope slot of Vue.js

Original address: Getting Your Head Around Vue.js Scoped Slots Author: Anthony Gore Translator: Chor Scope slot is a very useful feature in Vue.js, which can significantly improve the universality and reusability of components. The problem is that it's really not easy to understand. It is no less painful to try to understand the intricate r ...

Posted on Thu, 10 Oct 2019 06:08:41 -0700 by konky

Dalian Hotel Data Analysis

This project comes from the laboratory building.< Building+Data Analysis and Mining > Phase 6 student Miss_candy. "Building + Data Analysis and Mining Actual Practice" is a course content tailored to meet the needs of data analysis or data mining junior engineer positions in the experimental building. It consists of 35 experimen ...

Posted on Thu, 10 Oct 2019 05:58:24 -0700 by kevin777

Shell Programming-Conditional Judgment

Conditional Judgment of Shell Programming Conditional test operation test command Test whether a particular expression is valid. When the condition is valid, the return value of the test statement is 0, otherwise it is another value. Format 1: test conditional expression Format 2: [Conditional expression] Document testing[Operator file or dir ...

Posted on Thu, 10 Oct 2019 02:57:36 -0700 by swissbeets

Teaching Wife to Learn Common Command Guidelines for Linux Operations and Maintenance

Teach your wife to learn Linux (two) Linux frequently used command Guide Author: Yao Maomao's blog tips: The article is too long, and it is sent out in two chapters. The first three chapters are: 1. File and directory operation; 2. File viewing and editing; 3. File searching and statistics. [TOC] I. overview 1.1 Write in the front-Learning Gui ...

Posted on Wed, 09 Oct 2019 17:10:16 -0700 by the_damo2004

[Offer] [4] [Search in two-dimensional arrays]

Topic Description Thought analysis Java code Code Links Topic Description In a two-dimensional array, each row is sorted in increasing order from left to right, and each column is sorted in increasing order from top to bottom. Please complete a function, input such a two-dimensional array and an integer, to determine whether the arra ...

Posted on Wed, 09 Oct 2019 15:35:55 -0700 by pdn

Super Mario--Line Segment Tree+Discrete+Offline Processing

Topic link: https://cn.vjudge.net/problem/HDU-4417 General idea of the title Given a sequence of length n, m queries, Mario has a jump maximum for each query, asking how many obstacles Mario can overcome in this range (regardless of the blocked middle). Analysis In fact, it is to find out how man ...

Posted on Wed, 09 Oct 2019 05:30:53 -0700 by Irap

The Difference between parseInt and valueOf of Integer

Let's take a look at the following code String s = "1"; System.out.println(Integer.valueOf(s)); System.out.println(Integer.parseInt(s)); What is the output? Yes, the same is 1. Both methods can convert numeric strings to int-type integers, but there i s a difference between the two methods. The valueOf(String s) method calls the parseInt(Strin ...

Posted on Tue, 08 Oct 2019 23:12:31 -0700 by Fender963

Notes 8-Binary Search Tree in Algorithms

Binary search tree lookup insert performance Orderliness-related operations Maximum key and minimum key Up and down rectification Choice, ranking Range lookup Delete operation Delete maximum and minimum keys General Delete Operation Binary search tree Unordered linked lists and ordered arrays, as previously known, are at least linear ...

Posted on Tue, 08 Oct 2019 14:33:02 -0700 by leoric1928

[Redis5 source code learning] analysis of restore of redis command

Grape Command syntax Command Meaning: Deserialize a given serialized value and associate it with a given key. Command format: RESTORE key ttl serialized-value [REPLACE] [ABSTTL] [IDLETIME seconds] [FREQ frequency] Command actual combat redis> DEL mykey 0 redis> RESTORE mykey 0 "\n\x17\x17\x00\x00\x00\x12\x00\x00\x00\x03\x00\ ...

Posted on Tue, 08 Oct 2019 13:39:39 -0700 by TGWSE_GY