/ 设置 10 秒超时 // 每日统计清 0 runtime_set('todaycomments', 0); runtime_set('todayarticles', 0); runtime_set('todayusers', 0); if ($forumlist) { $fidarr = array(); foreach ($forumlist as $fid => $forum) { $fidarr[] = $forum['fid']; } forum_update($fidarr, array('todayposts' => 0, 'todaythreads' => 0)); } // 清理临时附件 attach_gc(); // 当天24点 $today = strtotime(date('Ymd')) + 86400; runtime_set('cron_2_last_date', $today, TRUE); // 往前推8个小时，尽量保证在前一天 升级过来和采集的数据会很卡 // table_day_cron($time - 8 * 3600); cache_delete('cron_lock_2'); } } } ?>javascript, can this code (nested IF statement) be shorter? - Stack Overflow|Concepts Of Algorithm
  2. Algorithm
  3. javascript, can this code (nested IF statement) be shorter? - Stack Overflow

javascript, can this code (nested IF statement) be shorter? - Stack Overflow

admin2025-04-15  17

I think below code can be simpleer somehow. Can this code be optimized?

let name = app.short_name;
  if (name === undefined) {
    name = app.name;
    if (name === undefined) {
      name = 'Untitled';
    }
  }

I think below code can be simpleer somehow. Can this code be optimized?

let name = app.short_name;
  if (name === undefined) {
    name = app.name;
    if (name === undefined) {
      name = 'Untitled';
    }
  }
  • javascript
Share Improve this question edited Jun 14, 2017 at 7:14 RNA asked Jun 14, 2017 at 6:47 RNARNA 1,0913 gold badges20 silver badges43 bronze badges 1
  • 5 yes, name could be n :p let name = app.short_name || app.name || 'Untitled'; – Jaromanda X Commented Jun 14, 2017 at 6:48
Add a ment  | 

3 Answers 3

Reset to default 9

Use Logical OR (||) operator

let name = app.short_name || app.name || 'Untitled';

You could use a default chain with logical OR || in a short-circuit evaluation.

let name = app.short_name || app.name || 'Untitled';

But I suggest to use a variable name different of name, because it is usually a property of window

Javascript will assign what it considers true. If you concat with || (OR) then each value is checked for true until a true value is found and is assigned.

There are a number of values that bee false for example:

  • undefined
  • 0
  • null
  • '' (empty String)
  • NaN

This is why you could write

let name = app.short_name || app.name || 'Untitled';

because if app.short_name has a value it will be true rather than false and it is assigned. But if it is undefined it will be considered false and app.name will be checked if it is true. If it is undefined it will be again considered false and so finally 'Untitled' is considered and deemed true and assigned to name. Might want to look at this link.

转载请注明原文地址:http://conceptsofalgorithm.com/Algorithm/1744715964a262840.html

JavaScript

can this code (nested IF statement) be shorterStack Overflow

最新回复(0)