te')); return $arr; } /* 遍历用户所有主题 * @param $uid 用户ID * @param int $page 页数 * @param int $pagesize 每页记录条数 * @param bool $desc 排序方式 TRUE降序 FALSE升序 * @param string $key 返回的数组用那一列的值作为 key * @param array $col 查询哪些列 */ function thread_tid_find_by_uid($uid, $page = 1, $pagesize = 1000, $desc = TRUE, $key = 'tid', $col = array()) { if (empty($uid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('uid' => $uid), array('tid' => $orderby), $page, $pagesize, $key, $col); return $arr; } // 遍历栏目下tid 支持数组 $fid = array(1,2,3) function thread_tid_find_by_fid($fid, $page = 1, $pagesize = 1000, $desc = TRUE) { if (empty($fid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('fid' => $fid), array('tid' => $orderby), $page, $pagesize, 'tid', array('tid', 'verify_date')); return $arr; } function thread_tid_delete($tid) { if (empty($tid)) return FALSE; $r = thread_tid__delete(array('tid' => $tid)); return $r; } function thread_tid_count() { $n = thread_tid__count(); return $n; } // 统计用户主题数 大数量下严谨使用非主键统计 function thread_uid_count($uid) { $n = thread_tid__count(array('uid' => $uid)); return $n; } // 统计栏目主题数 大数量下严谨使用非主键统计 function thread_fid_count($fid) { $n = thread_tid__count(array('fid' => $fid)); return $n; } ?>javascript - Reactjs promises, how should we use it? - Stack Overflow

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    I've been reading a lot about React for the last 3 days, but I don't see much information about the use of promises, so I have that concern.

    Is there any library for this?

    How should I use promises in React?

    I've been reading a lot about React for the last 3 days, but I don't see much information about the use of promises, so I have that concern.

    Is there any library for this?

    How should I use promises in React?

    • javascript
    • reactjs
    • promise
    Share Improve this question edited Aug 5, 2015 at 19:13 Non asked Aug 5, 2015 at 18:43 NonNon 8,58920 gold badges80 silver badges130 bronze badges 3
    • Maybe something is getting lost in translation, but how should I use promises in React is impossibly broad; you should use them wherever you need to, with whichever library you prefer. I also did not interpret is there any library for this to mean does react provide this functionality. – Evan Davis Commented Aug 5, 2015 at 20:41
    • A multiplicity of approaches to async calls (promise, callback) can be used in react ponents. You use them in react the same way you would in other contexts. React specialises exclusively on the rendering. Look into Flux or similar frameworks for managing the data flow with react. – widged Commented Aug 5, 2015 at 23:58
    • 1 You might find information that might help you refine your question by googling reactjs flux promise: facebook.github.io/flux/docs/todo-list.html, reactjsnews./getting-started-with-flux, madebymany./blog/…. This will locate some libs as well: npmjs./package/react-deferred. – widged Commented Aug 5, 2015 at 23:58
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    2 Answers 2

    Reset to default 8

    React doesn't e with a promise library baked in like Angular with $http. You will have to find your own.

    A few you can try:

    • Bluebird (personal remendation)
    • jQuery's $ajax
    • Native promises (unless you actually have to support IE): http://caniuse./#feat=promises

    Promise object is used for handling asynchronous putations which has some important guarantees that are difficult to handle with the callback method (the more old-school method of handling asynchronous code).

    A Promise object is simply a wrapper around a value that may or may not be known when the object is instantiated and provides a method for handling the value after it is known (also known as resolved) or is unavailable for a failure reason (we'll refer to this as rejected).

    Using a Promise object gives us the opportunity to associate functionality for an asynchronous operation's eventual success or failure (for whatever reason). It also allows us to treat these plex scenarios by using synchronous.

    To see more at : https://www.npmjs./package/react-promise

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