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function test() {
var arr = [];
for (var i = 0; i < 20; i++) {
var obj = {};
for (var j = 0; j < i+4; j++) {
obj["x_" + i + "_" + j] = 1;
}
arr.push(obj);
}
for (var i = 0; i < arr.length; i++) {
arr[i].a = 0;
}
for (let i=0; i<10000; i++) {
arr[i%9].a = i%9;
}
assertEq(arr[0].a, 0);
assertEq(arr[1].a, 1);
assertEq(arr[2].a, 2);
assertEq(arr[3].a, 3);
assertEq(arr[4].a, 4);
assertEq(arr[5].a, 5);
assertEq(arr[6].a, 6);
assertEq(arr[7].a, 7);
assertEq(arr[8].a, 8);
for (let i=0; i<10000; i++) {
var a = arr[i%9].a;
assertEq(a, i%9);
}
}
test();