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23 lines
465 B
23 lines
465 B
=proto
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void duk_dup(duk_context *ctx, duk_idx_t 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 <code>from_index</code> to the stack.
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If <code>from_index</code> 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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=tags
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stack
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=seealso
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duk_dup_top
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=introduced
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1.0.0
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