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37 lines
577 B
37 lines
577 B
12 years ago
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/*===
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undefined undefined
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===*/
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/* What should 'var x = x' do?
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*
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* Because variable declarations are "hoisted", i.e. magically processed
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* upon function entry, the right-hand-side 'x' should NOT refer to e.g.
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* a global value of 'x', but should be undefined.
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*/
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var x = 10;
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var y = 20;
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function f1() {
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var x = x;
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print(typeof x, x);
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}
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f1();
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/*===
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undefined undefined
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undefined undefined
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===*/
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/* Order trick should not help, both should be undefined. */
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function f2() {
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var y = x;
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var x = y;
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print(typeof x, x);
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print(typeof y, y);
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}
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f2();
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