pch questions

Common PHP algorithm questions and common PHP algorithm questions 1. PHP implements Binary Search# Binary SearchFunction binarySearch (Array $ arr, $ target ){$ Low = 0;$ High = count ($ arr)-1;While ($ low $ Mid = floor ($ low + $ high)/2 );# Finding ElementsIf ($ arr [$ mid] ==$ target) return $ mid;# The element in is larger than the target. Search for the left part.If ($ arr [$ mid]> $ target) $ high =

PHP interview questions, php questions Tip: Set the PHP file character encoding header ("content-type: text/html; charset = UTF-8") before the test code "); 1. 1.1 Use PHP to get the current time and print it. Format: 22:19:30 2. 2.1 convert string to array $ Str = "www.baidu.com ";$ Arr_str =Explode('.', $ Str );Print_r ($ arr_str); // Array ([0] => www [1] => baidu [2] => com)Echo 'Print_r (Str_split($

C/c ++ common interview questions, interview questions 1. What is the role of static in C? (1) Hide. When we compile multiple files at the same time, all global variables and functions without the static prefix have global visibility. Therefore, we use static to define functions with the same name and variables with the same name in different files, you don't have to worry about naming conflicts.(2) The sec

Questions about iOS development (9) and questions about ios development 101 compilation error: ld: library notfound for-lPods This error is often returned when cocoaPods is used in the project (usually when it is release ). This is because after pod install, cocoaPods will create a new workspace. You must close the project and re-open it. The problem can be solved. 102 why iOS is always eight hours slower t

JS handles some simple calculation questions and JS handles simple calculation questions Let's first look at the effect after running: Next we will share with you all the code: The JS Code and style can be flexibly changed when needed. Thank you for your support for the help house.

Java interview questions, java questions 1. storage structures used by stacks and queues Chain storage and sequential Storage 2. understanding of time complexity and space complexityTime Complexity: Number of statement executions in an algorithm, which is T (n). When n changes, it is O (f (n). For example, constant O (1 ), O (n2), O (nlog2n)Space complexity: the storage space consumed by an algorithm, in

independent function about a single run activity on a data set, a process that is an independent unit of the system's resource allocation and scheduling.A thread is an entity of a process that is the basic unit of CPU dispatch and dispatch, which is a smaller unit that can run independently than a process. The thread itself basically does not own the system resources, only has a point in the operation of the necessary resources (such as program counters, a set of registers and stacks), However,

, and the duplicate char is stored in ArrayList. We use the Collections.sort () function to sort the characters in the ArrayList, so the same characters must be contiguous. It then loops through the elements in the TreeSet collection, looking for the first and last occurrence of the element in ArrayList, the number of occurrences = The last occurrence-the number of occurrences of the first occurrence of +1.Second, the source codeProgram 1:Operation Result:Program 2:Operation Result:Program 3: O

word key that needs to be counted, then take advantage of Java's own indexof () Find the first occurrence of the word position,//statistics plus 1, and the previous statistics of the string truncated, in the remaining fields to match. int times = 0;while (true) {int index = Str.indexof (key), if (Index! =-1) {times++;str = str.substring (index + key.length ( ));} Else{return Times;}}}Operation Result:Source Code 3:Package Com.yue.day11;import Java.util.scanner;public class Yanghuitri {/** * Pri

); System.out.println ("Please enter the lower limit of the number:"); int low = Scanner.nextint (); System.out.println ("Please enter a number cap:"); int high = Scanner.nextint (); if (Low>high) {System.out.println ("you entered the wrong data, please re-enter!") "); System.out.println ("Please enter the lower limit of the number:"); low = Scanner.nextint (); System.out.println ("Please enter a number cap:"); high = Scanner.nextint ();} SYSTEM.OUT.PRINTLN (all primes between low+ "-" +high+ ")

) {Integer a = Integer.parseint (num);Long sum = 0;Long subsum = 0;for (int i=1;iSubsum = Subsum*10+a;sum = sum+subsum;}return sum;}}Operation Result:3. Procedure 3Package Tong.yue.hong;Import Java.util.Scanner;/** Title: If a number is exactly equal to the sum of its factors, this number is called the "end number", that is, the non-repetition factor other than itself and equal to itself. Programming to find all the finished numbers within M.* For example 6=1+2+3. The second complete number is 2

hundreds, 10 digits, single digit numbers are 1, 2, 3, 4. But must satisfy each one on the number is different, according to the permutation combination principle altogether has the 4*3*2=24 species. * @author Tong * */public class Pailiezuhe {public static void main (string[] args) {int count = 0;for (int i = 1; I Operation Result:3. Procedure 3Package Tong.yue.hong;import java.util.scanner;/** * The bonus awarded by the Enterprise is based on the profit commission. * Profit (I) less than or e

, the following about the IOC description error in the spring feature is ()A,ioc means that the relationship between programs is manipulated directly by the program code.B, the so-called "control reversal" refers to the transfer of control from the application code to the external container, that is, the control rightC,IOC the responsibility of controlling the creation into the framework, separating from the application codeD, when using the spring IOC container, only the objects required by the

Mvc: Definition of MVC:M: Business logic processing. "Business model"V: The part that handles the display of the data. "such as XML layout file"C:activity handles user interaction issues. "Activity in MVC plays the role of C." Features of MVC:① and low coupling.②, scalability is good.③ and module responsibilities are clearly divided. An example of MVC is detailed: Summarize:①, the use of MVC design patterns, so that the project has a very good scalability and maintenance.②, contro

This article focuses on the question of Ajax questions and answers, you can take a look at the interview of those who are how to issue, and see what the correct answer is. Now, let's see this article. 1. Do you interact with the background during work? Well, can you tell me a few parameters in the encapsulated Ajax? URL: The address where the request was sent. Type: The request method (post or get) defaults to get. Async: Synchronous asynchronous requ

as follows: SELECT * from WHERE >= (SELECT from articles WHERE = 123 ORDER by 10000 1 Ten 3. How does the MySQL index be implemented? What's the problem? Simply understood, the index is to speed up the query . The index is stored independently, so when the amount of data is large, updating the table to update the index at the same time, causing the update speed down . Here I have referred to two articles, the address is as follows: http://fangjian0423.github.io/2017/07/05/mysql-index-summar

If this problem occurs, you can remove the pre-compilation option from the project compilation options. Operation steps: Re-compile the project first, if the problem persists, select "automatic use of precompiled headers" in the precompiled header

Select sorting (0th questions in 2nd) and sort 2 questions in 0thQuestion requirements Problem description: Select 10 integers in ascending order. Example input: 4 85 3 234 45 345 345 30 12 Sample output: 3 4 12 30 45 85 122 234 345Solution Select sorting. One scheme is to continuously select the smallest number from the current sequence at the beginning, and the other scheme is to select the largest nu

Full sorting of questions (0th questions of the 1st session) and 1 question of The 0th sessionQuestion requirements Problem description: enterPossible repetitionEnglish string (with a comma as the end mark), PressDictionary orderNo possible arrangement is output repeatedly. Example input 1: abc, Sample output 1: abc acb bac bca cab CBA Example input 2: cab, Sample Output 2: abc acb bac bca cab CBA Example i

Spring Interview Questions and Answers, Spring interview questions Spring Overview 1. What is spring? Spring is an open source development framework for java Enterprise applications. Spring is mainly used to develop Java applications, but some extensions are used to build web applications on the J2EE platform. The Spring framework aims to simplify Java enterprise-level application development and promote go