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name: duk_has_prop_heapptr
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proto: |
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duk_bool_t duk_has_prop_heapptr(duk_context *ctx, duk_idx_t obj_idx, void *ptr);
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stack: |
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[ ... obj! ... ] -> [ ... obj! ... ]
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summary: |
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<p>Like <code><a href="#duk_has_prop">duk_has_prop()</a></code>, but the
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property name is given as a Duktape heap pointer obtained e.g. using
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<code><a href="#duk_get_heapptr">duk_get_heapptr()</a></code>. If
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<code>ptr</code> is NULL, <code>undefined</code> is used as the key.</p>
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example: |
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void *ptr;
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duk_push_string(ctx, "propertyName");
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ptr = duk_get_heapptr(ctx, -1);
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/* String behind 'ptr' must remain reachable! */
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if (duk_has_prop_heapptr(ctx, -3, ptr)) {
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printf("obj has 'myProperty'\n");
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} else {
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printf("obj does not have 'myProperty'\n");
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}
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tags:
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- property
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- borrowed
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- heapptr
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seealso:
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- duk_has_prop
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- duk_has_prop_index
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- duk_has_prop_string
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- duk_has_prop_lstring
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- duk_has_prop_literal
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introduced: 2.2.0
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