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Shortest distance between a point and a line segment
... const float l2 = length_squared(v, w); // i.e. |w-v|^2 - avoid a sqrt
if (l2 == 0.0) return distance(p, v); // v == w case
// Consider the line extending the segment, parameterized as v + t (w - v).
// We find projection of point p onto the line.
// It falls where t = [(p-v) . (w-v)] /...
How to print binary tree diagram?
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I've created simple binary tree printer. You can use and modify it as you want, but it's not optimized anyway. I think that a lot of things can be improved here ;)
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
public class BTreePrinterTest {
p...
How to know if two arrays have the same values
...
function arraysEqual(_arr1, _arr2) {
if (!Array.isArray(_arr1) || ! Array.isArray(_arr2) || _arr1.length !== _arr2.length)
return false;
var arr1 = _arr1.concat().sort();
var arr2 = _arr2.concat().sort();
for (var i = 0; i < arr1.length; i...
串口通信器使用指导 · App Inventor 2 中文网
...bal 等待次数 = 0
global 发送帧 = []
when 按钮_打开.Click() {
if (not 串口通信器1.IsOpen) {
串口通信器1.InitializeSerial()
if (串口通信器1.OpenSerial()) {
缓冲 = []
等待回复 = false
计时器1.TimerEnabled = true
标签_状态.Text = ...
Switch statement for greater-than/less-than
...------
1.0 time 37ms 73ms 68ms 184ms 73ms 21ms
if-immediate 1.0 1.0 1.0 2.6 1.0 1.0
if-indirect 1.2 1.8 3.3 3.8 2.6 1.0
switch-immediate 2.0 1.1 2.0 1.0 2.8 1.3
switch-range ...
What is the relative performance difference of if/else versus switch statement in Java?
Worrying about my web application's performances, I am wondering which of "if/else" or switch statement is better regarding performance?
...
What purpose does a tag serve inside of a tag?
...nit() {
var dependencies = document.getElementById("inline-deps");
if (!dependencies || JS.hasClass(document.body, "deps--loaded")) {
webfontsReady();
} else {
var html = dependencies.innerText || dependencies.textContent;
JS.addClass(document.body, "deps--loaded");
...
How to detect a Christmas Tree? [closed]
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I have an approach which I think is interesting and a bit different from the rest. The main difference in my approach, compared to some of the others, is in how the image segmentation step is performed--I used the DBSCAN clustering algorithm from Python's scikit-learn; it's optimize...
Checking if sys.argv[x] is defined
What would be the best way to check if a variable was passed along for the script:
8 Answers
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jQuery.inArray(), how to use it right?
...ay returns the index of the element in the array, not a boolean indicating if the item exists in the array. If the element was not found, -1 will be returned.
So, to check if an item is in the array, use:
if(jQuery.inArray("test", myarray) !== -1)
...