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JS_SetElement 编辑

Assign a value to a numeric property of an object.

Syntax

/* Added in SpiderMonkey 31 */

bool
JS_SetElement(JSContext *cx, JS::HandleObject obj, uint32_t index,
              JS::HandleValue v);

bool
JS_SetElement(JSContext *cx, JS::HandleObject obj, uint32_t index,
              JS::HandleObject v);

bool
JS_SetElement(JSContext *cx, JS::HandleObject obj, uint32_t index,
              JS::HandleString v);

bool
JS_SetElement(JSContext *cx, JS::HandleObject obj, uint32_t index,
              int32_t v);

bool
JS_SetElement(JSContext *cx, JS::HandleObject obj, uint32_t index,
              uint32_t v);

bool
JS_SetElement(JSContext *cx, JS::HandleObject obj, uint32_t index,
              double v);


/* Obsolete since JSAPI 29 */
bool
JS_SetElement(JSContext *cx, JS::HandleObject obj, uint32_t index,
              JS::MutableHandleValue vp);

Name	Type	Description
`cx`	`JSContext *`	The context in which to set the element. Requires request. In a `JS_THREADSAFE` build, the caller must be in a request on this `JSContext`.
`obj`	`JS::HandleObject`	The object to modify, commonly an Array object.
`index`	`uint32_t`	Index number of the element to set.
`v`	`JS::HandleValue` or `JS::HandleObject` or `JS::HandleString` or `int32_t` or `uint32_t` or `double`	The value to assign to the element. Added in SpiderMonkey 31
`vp`	`JS::MutableHandleValue`	In/out parameter. `vp` is the value to assign to the element. `JS_SetElement` ordinarily leaves `vp` unchanged, but a `JSClass.addProperty` hook or non-default `setter` may modify it. Obsolete since JSAPI 29

Description

JS_SetElement assigns a value to a numeric property of an object. It behaves like the JavaScript expression obj[index] = v.

On success, JS_SetElement returns true. On error or exception, JS_SetElement returns false.

Obsolete since JSAPI 29

On success, JS_SetElement returns true and the value left in *vp is left unchanged unless an addProperty hook or setter modified it. On error or exception, JS_SetElement returns false and the value left in *vp is unspecified.

JS_SetElement 编辑

Syntax

Description

See Also

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友情链接

JS_SetElement 编辑

Syntax

Description

See Also

如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

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友情链接

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。