Tag：Slope

Time：2021130
1. Eight queens Put eight queens on the 8 × 8 chessboard so that they can’t attack each other, that is, any two Queens can’t be in the same row, the same column or the same diagonal line. How many kinds of pendulum are there. 2. Ideas This problem is very suitable to be solved […]

Time：20201120
The maximum number of points on a line difficultydifficulty Given a twodimensional plane, there are n points on the plane, find the maximum number of points on the same line. Example 1:Input: [[1,1],[2,2],[3,3]]Output: 3Explanation: Example 2:Input: [[1,1],[3,2],[5,3],[4,1],[2,3],[1,4]]Output: 4Explanation: thinking First, you need to make sure that two points are on a straight line – that […]

Time：202078
effect Analyzing the animation can be divided into two steps: Add an animation class when the mouse moves in or out Realize the animation class and move in and out animation Picture waterfall flow layout can refer to Vue handwritten picture waterfall flow component (with source code) HTML and CSS layout The layout is relatively […]

Time：2020313
Introduction: the simple line animation of canvas animation introduction series. Although it’s simple, there are quite a lot of wired animation application scenes, so I made a small demo, which is all in one. Step1: draw points Create tags first<canvas id=”canvas” width=”400″ height=”400″></canvas>Set the coordinates of several points const points = [ [200, 100], // […]

Time：2020213
limit limit Slope The slope is positive and negative: The slope is a positive number, indicating that the original function is positively correlated with the independent variable, On the contrary, the original function is negatively correlated with the independent variable. The positive and negative slope can be used as a condition to judge the extreme […]