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33 lines
717 B
33 lines
717 B
=proto
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void duk_copy(duk_context *ctx, duk_idx_t from_index, duk_idx_t to_index);
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=stack
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[ ... old(to_index)! ... val(from_index)! ... ] -> [ ... val(to_index)! ... val(from_index)! ... ]
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=summary
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<p>Copy a value from <code>from_index</code> to <code>to_index</code>,
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overwriting the previous value. If either index is invalid, throws an
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error.</p>
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<p>This is a shorthand for:</p>
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<pre class="c-code">
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/* to_index must be normalize in case it is negative and would change its
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* meaning after duk_dup().
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*/
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to_index = duk_normalize_index(ctx, to_index);
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duk_dup(ctx, from_index);
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duk_replace(ctx, to_index);
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</pre>
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=example
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duk_copy(ctx, -3, 1);
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=tags
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stack
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=seealso
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duk_insert
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duk_replace
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=introduced
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1.0.0
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