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25 lines
776 B
Plaintext
25 lines
776 B
Plaintext
// Returns characters (as strings).
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io.write("abcd"[0]) // expect: a
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io.write("abcd"[1]) // expect: b
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io.write("abcd"[2]) // expect: c
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io.write("abcd"[3]) // expect: d
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// Allows indexing backwards from the end.
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io.write("abcd"[-4]) // expect: a
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io.write("abcd"[-3]) // expect: b
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io.write("abcd"[-2]) // expect: c
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io.write("abcd"[-1]) // expect: d
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// Handle out of bounds.
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// TODO(bob): Should halt the fiber or raise an error somehow.
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io.write("abcd"[4]) // expect: null
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io.write("abcd"[-5]) // expect: null
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// Handle wrong argument type.
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// TODO(bob): Should halt the fiber or raise an error somehow.
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io.write("abcd"[true]) // expect: null
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// Handle non-integer index.
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// TODO(bob): Should halt the fiber or raise an error somehow.
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io.write("abcd"[1.5]) // expect: null
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