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15 lines
397 B
15 lines
397 B
11 years ago
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=proto
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void duk_dup(duk_context *ctx, int from_index);
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=stack
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[ ... val! ... ] -> [ ... val! ... val! ]
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=summary
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<p>Push a duplicate of value at <tt>from_index</tt> to the stack.
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If <tt>from_index</tt> is invalid, throws an error.</p>
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=example
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duk_push_int(ctx, 123); /* -> [ ... 123 ] */
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duk_push_int(ctx, 234); /* -> [ ... 123 234 ] */
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duk_dup(ctx, -2); /* -> [ ... 123 234 123 ] */
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