When I write pathfinding codes in JavaScript, I ran into this problem: how to empty the array?
Methods
1
| array.splice(0, array.length)
|
1
2
3
| while (array.length > 0) {
array.pop()
}
|
Difference between Method 1 and the others
Method 1 only reassign a:
1
2
3
4
5
6
7
8
| let a = [1, 2, 3]
let b = a
// empty a, but doesn't affect b
a = []
console.log('a =', a)
console.log('b =', b)
|
Method 2, 3, 4, will empty multiple variables referencing the same object:
1
2
3
4
5
6
7
8
| let a = [1, 2, 3]
let b = a
// empty a and b
a.length = 0
console.log('a =', a)
console.log('b =', b)
|
More
See https://github.com/UMU618/js-empty-array#example
