15 lines
170 B
JavaScript
15 lines
170 B
JavaScript
const obj = {
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a: {
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b: 0,
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},
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};
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obj?.a.b = 1;
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assert.equal(obj.a.b, 1);
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obj?.a?.b = 2;
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assert.equal(obj.a.b, 2);
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obj?.b?.b = 3;
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assert.equal(obj.b, undefined);
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