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25 lines
633 B
25 lines
633 B
name: duk_to_boolean
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proto: |
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duk_bool_t duk_to_boolean(duk_context *ctx, duk_idx_t idx);
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stack: |
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[ ... val! ... ] -> [ ... ToBoolean(val)! ... ]
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summary: |
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<p>Replace the value at <code>idx</code> with an ECMAScript
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<a href="http://www.ecma-international.org/ecma-262/5.1/#sec-9.2">ToBoolean()</a>
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coerced value. Returns 1 if the result of the coercion <code>true</code>, 0 otherwise.
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If <code>idx</code> is invalid, throws an error.</p>
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<div include="ref-custom-type-coercion.html" />
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example: |
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if (duk_to_boolean(ctx, -3)) {
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printf("coerced value is true\n");
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}
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tags:
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- stack
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introduced: 1.0.0
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