2d

问题 I need to sort a shopping list by the aisle the item is located for example: [Bread] [1] [Milk] [2] [Cereal] [3] I am planning to do this with ArrayList and was wondering how to make an 2D ArrayList Bonus questions: any ideas on how to sort by the aisle number? 回答1: Don't you have a class that holds your item + aisle information? Something like: public class Item { private String name; private int aisle; // constructor + getters + setters } If you don't, consider making one - it's definitely

问题 Say, for example, I had ... x = [1 1 2 2]; y = [1 2 2 1]; plot(x, y, 'b-'); I will get a plot with lines connecting the points (1,1), (1,2), and (2,2). Is there any way to connect the final point with the first, thus completing the square on the plot? I'm also pulling in lines of text with points, so simply adding another point 1,1 is not an option. 回答1: impoly can be useful, however, it creates a modifiable curve which is slower than plot. You can write a simple function for that: function

问题 Say, for example, I had ... x = [1 1 2 2]; y = [1 2 2 1]; plot(x, y, 'b-'); I will get a plot with lines connecting the points (1,1), (1,2), and (2,2). Is there any way to connect the final point with the first, thus completing the square on the plot? I'm also pulling in lines of text with points, so simply adding another point 1,1 is not an option. 回答1: impoly can be useful, however, it creates a modifiable curve which is slower than plot. You can write a simple function for that: function

问题 I have a cubic bezier with 2 control points. Starting point and control points are known. Need to get all the points of the curve, given the control, starting and ending points. What I wanna to achieve is ..given a value i from 1 to length of curve.. get the X and Y and alpha (angle) of each point in that position. I cannot find a good reference or working code for that. I'm using javascript. 回答1: If I understand correctly, you are trying to determine the position and slope (tangent to the

问题 I have a question very similar to this: How to know if a line intersects a plane in C#? I am searching for a method (in C#) that tells if a line is intersecting an arbitrary polygon. I think the algorithm by Chris Marasti-Georg was very helpful, but missing the most important method, i.e. line to line intersection. Does anyone know of a line intersection method to complete Chris Marasti-Georg's code or have anything similar? Is there a built-in code for this in C#? This method is for use with

问题 Consider that I have a txt file containing data of the following format: "Home" "A1" "Car" "A2" "Home" "B1" "Home" "A1" "Car" "A2" "Man" "B1" How I can store this kind of data and also in sorted format, without duplicate data? But The first and third element must not be deleted as they are different with 2nd parameter (repetition of second parameter is allowed but not both 1st and 2nd). Please suggest any better collection from Java suitable. Also please give an example as I am new to Java.

问题 I have a 2D array containing integers (both positive or negative). Each row represents the values over time for a particular spatial site, whereas each column represents values for various spatial sites for a given time. So if the array is like: 1 3 4 2 2 7 5 2 2 1 4 1 3 3 2 2 1 1 The result should be 1 3 2 2 2 1 Note that when there are multiple values for mode, any one (selected randomly) may be set as mode. I can iterate over the columns finding mode one at a time but I was hoping numpy

问题 I'm fairly new to coding, I'm still trying to develop that logic of thinking to help me create the solutions I'm wanting for games. Currently, I'm in Unity trying to create a 2D GameObject that's a wall hiding a secret door. I want that GameObject to fade out (about 90%) when the player GameObject triggers it, revealing the space behind and the hidden door. So far, I've managed to figure out how to render the "secret wall" GO inactive on the trigger, so it disappears, but this doesn't produce

问题 I'm fairly new to coding, I'm still trying to develop that logic of thinking to help me create the solutions I'm wanting for games. Currently, I'm in Unity trying to create a 2D GameObject that's a wall hiding a secret door. I want that GameObject to fade out (about 90%) when the player GameObject triggers it, revealing the space behind and the hidden door. So far, I've managed to figure out how to render the "secret wall" GO inactive on the trigger, so it disappears, but this doesn't produce

问题 I'm fairly new to coding, I'm still trying to develop that logic of thinking to help me create the solutions I'm wanting for games. Currently, I'm in Unity trying to create a 2D GameObject that's a wall hiding a secret door. I want that GameObject to fade out (about 90%) when the player GameObject triggers it, revealing the space behind and the hidden door. So far, I've managed to figure out how to render the "secret wall" GO inactive on the trigger, so it disappears, but this doesn't produce