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step 4: Test (if nil 1) returns nil
Certain implementations like the one I wrote can get this wrong.
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@ -50,6 +50,8 @@
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;; Testing 1-way if form
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(if false (+ 1 7))
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;=>nil
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(if nil 8)
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;=>nil
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(if nil 8 7)
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;=>7
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(if true (+ 1 7))
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