<script type="text/javascript">
var i = 1;
var j = 2;
var a = [1, 2];
function arr(b) {
b[0] = 2;
}
function me(x, y) {
x = x+y;
return x;
}
arr(a);
console.log(i); // 1
console.log(JSON.stringify(a)); // [2,2]
</script>
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