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34 lines
758 B
34 lines
758 B
name: duk_copy
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proto: |
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void duk_copy(duk_context *ctx, duk_idx_t from_idx, duk_idx_t to_idx);
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stack: |
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[ ... old(to_idx)! ... val(from_idx)! ... ] -> [ ... val(to_idx)! ... val(from_idx)! ... ]
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summary: |
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<p>Copy a value from <code>from_idx</code> to <code>to_idx</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 normalized 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_idx = duk_normalize_idx(ctx, to_idx);
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duk_dup(ctx, from_idx);
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duk_replace(ctx, to_idx);
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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: 1.0.0
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