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31 lines
872 B
31 lines
872 B
name: duk_has_prop_index
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proto: |
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duk_bool_t duk_has_prop_index(duk_context *ctx, duk_idx_t obj_idx, duk_uarridx_t arr_idx);
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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>,
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but the property name is given as an unsigned integer
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<code>arr_idx</code>. This is especially useful for checking
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existence of array elements (but is not limited to that).</p>
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<p>Conceptually the number is coerced to a string for property
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existence check, e.g. <code>123</code> would be equivalent to a property
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name <code>"123"</code>. Duktape avoids an explicit coercion whenever
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possible.</p>
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example: |
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if (duk_has_prop_index(ctx, -3, 123)) {
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printf("obj has index 123\n");
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} else {
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printf("obj does not have index 123\n");
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}
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tags:
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- property
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- stack
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introduced: 1.0.0
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