Month: January 2023

[Solved] Hello There! I am learning Java and completely unaware about it! what is diffrence between instance methods and non-static methods? [closed]

by

Instance method and non-static methods are same thing. Different types of methods are : Instance methods: Which are associated with objects. Class methods: These are the static methods. class Demo{ void hello(){ System.out.println(“Hello”); } static void hi(){ System.out.println(“hi”); } } To call instance method you need to do, new Demo().hello(); To call class method you … Read more

[Solved] C++ why std::string is much slower than C string

by

Quite interesting results. I’ve re-run the benchmark on 4.8.2 20140120 and got: strcmp : 1.938 secs std::string.compare(const char* s) : 1.842 secs std::string == std::string : 1.225 secs strncmp : 2.660 secs memcmp : 1.182 secs std::string.compareN : 1.711 secs strstr : 5.854 secs memmem : 1.187 secs std::string.find : 14.363 secs So std::string behaves … Read more

[Solved] Bizarre C++ code, trying to decipher

by

You didn’t specify the types, so I’m going to assume that these are all builtin C++ types, specifically arithmetic types (either integer type or a floating point type). If it is a user defined type, I can’t guarantee that anything I say below still applies. T& lhs.operator=(T& rhs) is the copy assignment operator (it could … Read more

[Solved] Why is the circle not round bootstrap and fontawesome?

by

Change service-icon class. Width must be 120px because you have padding of 20px. Old width was 80px, so 80-20-20 (padding left and right) = 40px So width was 40px and height was 80px, with border-radius of 50% it was ellipse; Right .service-icon: .service-box .service-icon { width: 120px; height: auto; font-size: 70px; margin: 15px auto; padding: … Read more

[Solved] generate password and specify how many degints and words [closed]

by

Guessing you might benefit from an answer that walked you through what was going on, rather than just giving you wanted, might be useful for you in the future. function randomString($length) { // Generates a random string of $length characters long $letters = “abcdefghijklmnopqrstuwxyzABCDEFGHIJKLMNOPQRSTUWXYZ”; // Characters you don’t mind having more than one of $random_string … Read more

[Solved] Tuple variables – Can someone explain to me the following SQL statement

by

Considering you’re only selecting the address, those selects are equivalent. It returns two addresses because there are two “Johns”. Joining on address would allow you to figure you who else lives with John. For example: SELECT c2.first_name FROM users c1, users c2 WHERE c1.address = c2.address AND c1.first_name=”John” AND c2.first_name != ‘John’ would tell you … Read more

[Solved] Java: How to print odd and even numbers from 2 separate threads using Executor framework

by

Its a modified version of jasons: import java.util.concurrent.Executor; import java.util.concurrent.Executors; import java.util.concurrent.atomic.AtomicInteger; public class Test { public static void main(String[] args){ final int max = 100; final AtomicInteger i = new AtomicInteger(0); Executor dd = Executors.newFixedThreadPool(2); final Object lock = new Object(); dd.execute(new Runnable() { @Override public void run() { while (i.get() < max) { … Read more

[Solved] SQL statement thinking non distinct [closed]

by

A simple GROUP BY should work for you: SELECT Col1,Col2 FROM YourTable T GROUP BY Col1,Col2 HAVING COUNT(*) > 1 Please post what you have tried going forward… –EDIT– If you’re look at returning all rows that have the same lat/lon, then something like this would work: SELECT * FROM YourTable WHERE (lat,lon) IN ( … Read more

[Solved] Find out the distance between two specific words in a String [closed]

by

Just a pointer, you can optimize the code: public static void main(String[] args) { String str = “The picture quality is great of this camera”; StringTokenizer st = new StringTokenizer(str); int numberOfWords = 0; boolean start = false; while(st.hasMoreTokens()){ String token = st.nextToken(); if(token.equals(“quality”)){ start = true; continue; } if(start) { if(token.equals(“great”)){ start = false; … Read more

[Solved] How can I get the index number of any column in an SQL database?

by

Most, but not all (I think Oracle is one which doesn’t) database systems implemented the INFORMATION_SCHEMA which you can query to get information about database objects. In order to get the ordinal position of a column in a table, you can use: SELECT C.ORDINAL_POSITION FROM INFORMATION_SCHEMA.COLUMNS AS C WHERE C.TABLE_NAME = ‘Table’ AND C.COLUMN_NAME = … Read more