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var cases = [
function (obj) {
return obj["ab"];
},
function (obj) {
return obj["a" + "b"];
},
function (obj) {
return obj[0 ? "cd" : "ab"];
},
function (obj) {
return obj[true ? "ab" : "cd"];
},
function (obj) {
return obj[(1 + 0) ? "ab" : "cd"];
}
]
for (var i = 0; i < cases.length; i++) {
assertEq(cases[i]({ab: 42}), 42);
assertEq(cases[i]({cd: 120}), undefined);
}