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35 lines
974 B
35 lines
974 B
name: duk_is_function
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proto: |
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duk_bool_t duk_is_function(duk_context *ctx, duk_idx_t idx);
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stack: |
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[ ... val! ... ]
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summary: |
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<p>Returns 1 if value at <code>idx</code> is an object and is a function (has the
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internal class <code>Function</code>), otherwise returns 0. If <code>idx</code> is
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invalid, also returns 0.</p>
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<p>This function returns 1 when the following ECMAScript expression is true:</p>
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<pre class="ecmascript-code">
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Object.prototype.toString.call(val) === '[object Function]'
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</pre>
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<p>To determine the specific type of the function, use:</p>
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<ul>
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<li><code><a href="#duk_is_c_function">duk_is_c_function()</a></code></li>
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<li><code><a href="#duk_is_ecmascript_function">duk_is_ecmascript_function()</a></code></li>
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<li><code><a href="#duk_is_bound_function">duk_is_bound_function()</a></code></li>
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</ul>
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example: |
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if (duk_is_function(ctx, -3)) {
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/* ... */
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}
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tags:
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- stack
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- function
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introduced: 1.0.0
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