arrays

问题 Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . Improve this question A sample of the statement to type when using the method is System.arraycopy(data, i, data, i+1, data.length-i-1); The way it works according to my book is that the system move all element from i onward one position up. But intuitively I will think that the

问题 Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . Improve this question A sample of the statement to type when using the method is System.arraycopy(data, i, data, i+1, data.length-i-1); The way it works according to my book is that the system move all element from i onward one position up. But intuitively I will think that the

问题 I am a beginner trying to learn C++. Apologies if my question is not structured properly? I was working with arrays and found out that I can manipulate the values stored in an array through a function without using the & or pass by reference sign. I don't understand how this is possible as the lack of & sign means that it is passed by value and a copy is made which is manipulated. Elsewhere, I read that arrays are passed by pointers if this is the case I didn't use any explicit dereferencing

问题 I'm currently trying to modify an array of objects to break out into a nested array of objects based on grouping the value of a key. This is an example of the initial data format: [ {key: "Toyota", color: "red", cost: 100 }, {key: "Toyota", color: "green", cost: 200 }, {key: "Chevrolet", color: "blue", cost: 300 }, {key: "Honda", color: "yellow", cost: 400 }, {key: "Datsun", color: "purple", cost: 500 } ] This is the output I'm trying to put together: [{ key: "Toyota", values: [ {color: "red"

问题 I'm currently trying to modify an array of objects to break out into a nested array of objects based on grouping the value of a key. This is an example of the initial data format: [ {key: "Toyota", color: "red", cost: 100 }, {key: "Toyota", color: "green", cost: 200 }, {key: "Chevrolet", color: "blue", cost: 300 }, {key: "Honda", color: "yellow", cost: 400 }, {key: "Datsun", color: "purple", cost: 500 } ] This is the output I'm trying to put together: [{ key: "Toyota", values: [ {color: "red"

问题 I am a very new programmer, and have been struggling to write a method that can take any 2D array and fill it with random integers from 1 to 15. I believe I managed to build my method correctly, but I can't seem to see how to then call my method to fill the array I made in main. (I would have just filled it in main right out, but I'm trying to practice methods as well.) Here is the code I have so far. I appreciate any help you all are able to give me, thanks! using System; using System

问题 I've inherited a database that stores an array of strings in the following format: {"First","Second","Third","Fourth"} This is output as an ordered list in the application. We're replacing the front-end mobile app at the moment (ionic / angular) and want to do an ngFor over this array. In the first iteration, we did a quick and dirty replace on the curly brackets and then split the string on "," but would like to use a better method. What is the best method for treating this type of string as

问题 This is a follow up of my question given here. In the end I want to create a constexpr std::array containing text with an appended running index. I wanted to try a different approach than in the previous question. Nearly everything, what I do in the below code is constexpr. But maybe, it is simply the old problem of returning a pointer to a no longer existing variable. But, I doubt this. Please see the following code, where the not working line in function main is marked. #include <iostream>

问题 I have a problem with creating a recursive array with PHP. I need to format this string to a multidimensional array with the dot-separated elements indicating multiple levels of array keys. $str = "code.engine,max_int.4,user.pre.3,user.data.4"; The output for this example would be: $str = array( "code" => "engine", "max_int" => 4, "user" => array( "pre" => 3, "data" => 4 ) ); I will start with an explode function, but I don't know how to sort it from there, or how to finish the foreach. 回答1:

问题 I am relatively new to Java and I have taken some light courses on it. I am trying to emulate an exercise that I had a while back and I am having some trouble. I have two classes. One is taking in data and the other is storing it. public class Car{ public Car(String name, String color) { this.name = name, this.color = color } How can I store this into the array (not an array list) that I created in this class: public class CarDatabase { Car[] carList = new Car[100]; public CarDatabase() { //