How can you quickly remove all elements from an array that has already been declared previously?

$ arr = null;

removes the array itself, not its contents.

Answer 1, authority 100%

Maybe I didn’t understand something, but:

var array = [1,2,3,4,5];
array = []; //: D

Answer 2, authority 99%

arr.splice (0, arr.length);

or

arr.length = 0;

Answer 3, authority 29%

I’m just getting started with JS , and I myself came across this forum in search of an answer to the question posed.

It seems like I found it in the arr.shift (); method. This method clears the 0 array cell.

You can make a loop for clearing an array, for example, or maybe there are more efficient ways.