'ondragstart event not firing and not working
i have 3 buttons and i wanna see a message when i drag or click or end drag them but I'm so confused with the firing of the events.
let me show you an example :
function click(event){
event.preventDefault();
/*
lastwordchoosed = "";
isindrag = true;
*/
//lastwordchoosed += document.getElementById(id).innerHTML;
console.log("you started dragging");
}
function over(event){
event.preventDefault();
console.log("you go on a button")
//lastwordchoosed += document.getElementById(id).innerHTML;
debugger;
}
function up(event){
event.preventDefault();
console.log("you stopped dragging");
//lastwordchoosed += document.getElementById(id).innerHTML
debugger;
}<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<p draggable="true" id="b1" ondragstart="click(event)" ondragover="over(event)" ondragend="up(event)" style="font-size: 30pt;">a</p>
<p draggable="true" id="b2" ondragstart="click(event)" ondragover="over(event)" ondragend="up(event)" style="font-size: 30pt;">z</p>
<p draggable="true" id="b3" ondragstart="click(event)" ondragover="over(event)" onmouseup="up(event)" style="font-size: 30pt;">b</p>
<p id="demo"></p>
</body>
<script src="index.js"></script>
</html>Solution 1:[1]
click() is the inbuilt of javascript's button object. for that function click(event) not working. need change Function name.
function click1(event){
event.preventDefault();
/*
lastwordchoosed = "";
isindrag = true;
*/
//lastwordchoosed += document.getElementById(id).innerHTML;
console.log("you started dragging");
}
function over(event){
event.preventDefault();
console.log("you go on a button")
//lastwordchoosed += document.getElementById(id).innerHTML;
debugger;
}
function up(event){
event.preventDefault();
console.log("you stopped dragging");
//lastwordchoosed += document.getElementById(id).innerHTML
debugger;
}<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<p draggable="true" id="b1" ondragstart="click1(event)" ondragover="over(event)" ondragend="up(event)" style="font-size: 30pt;">a</p>
<p draggable="true" id="b2" ondragstart="click1(event)" ondragover="over(event)" ondragend="up(event)" style="font-size: 30pt;">z</p>
<p draggable="true" id="b3" ondragstart="click1(event)" ondragover="over(event)" onmouseup="up(event)" style="font-size: 30pt;">b</p>'
<p id="demo"></p>
</body>
<script src="index.js"></script>
</html>Solution 2:[2]
this would be:
actual_y = [10,20,30,40,50,60,70,80,90]
predicted_y = [1,2,3,4,5,6,7,8,9]
difference = [i-j for i,j in zip(actual_y,predicted_y)]
print(abs(difference))
Output:
[9, 18, 27, 36, 45, 54, 63, 72, 81]
Solution 3:[3]
alternatively you could use numpy :
import numpy as np
actual_y = np.array([10,20,30,40,50,60,70,80,90])
predicted_y = np.array([1,2,3,4,5,6,7,8,9])
print(actual_y - predicted_y)
output :
>>> [ 9 18 27 36 45 54 63 72 81]
Solution 4:[4]
The previous solution are fine, but if you still want to use the for loop, it may look like this.
actual_y = [10,20,30,40,50,60,70,80,90]
predicted_y = [1,2,3,4,5,6,7,8,9]
D = []
for i in range(0,len(actual_y)):
B = actual_y[i] - predicted_y[i]
D.append(B)
print(D)
[9, 18, 27, 36, 45, 54, 63, 72, 81]
Sources
This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.
Source: Stack Overflow
| Solution | Source |
|---|---|
| Solution 1 | |
| Solution 2 | |
| Solution 3 | eshirvana |
| Solution 4 |