Is it an antipattern to set an array length in JavaScript?

Question

Is it bad to use code like:

var a = [1,2,3,4];
a.length = 2; // 3 and 4 are removed

Does it have decent browser support? Do the removed val

Answer 1

It is not an anti pattern. It is supported in all major browsers. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/length