权限没有,则隐藏 function forum_list_access_filter($forumlist, $gid, $allow = 'allowread') { global $grouplist; if (empty($forumlist)) return array(); if (1 == $gid) return $forumlist; $forumlist_filter = $forumlist; $group = $grouplist[$gid]; foreach ($forumlist_filter as $fid => $forum) { if (empty($forum['accesson']) && empty($group[$allow]) || !empty($forum['accesson']) && empty($forum['accesslist'][$gid][$allow])) { unset($forumlist_filter[$fid]); } unset($forumlist_filter[$fid]['accesslist']); } return $forumlist_filter; } function forum_filter_moduid($moduids) { $moduids = trim($moduids); if (empty($moduids)) return ''; $arr = explode(',', $moduids); $r = array(); foreach ($arr as $_uid) { $_uid = intval($_uid); $_user = user_read($_uid); if (empty($_user)) continue; if ($_user['gid'] > 4) continue; $r[] = $_uid; } return implode(',', $r); } function forum_safe_info($forum) { //unset($forum['moduids']); return $forum; } function forum_filter($forumlist) { foreach ($forumlist as &$val) { unset($val['brief'], $val['announcement'], $val['seo_title'], $val['seo_keywords'], $val['create_date_fmt'], $val['icon_url'], $val['modlist']); } return $forumlist; } function forum_format_url($forum) { global $conf; if (0 == $forum['category']) { // 列表URL $url = url('list-' . $forum['fid'], '', FALSE); } elseif (1 == $forum['category']) { // 频道 $url = url('category-' . $forum['fid'], '', FALSE); } elseif (2 == $forum['category']) { // 单页 $url = url('read-' . trim($forum['brief']), '', FALSE); } if ($conf['url_rewrite_on'] > 1 && $forum['well_alias']) { if (0 == $forum['category'] || 1 == $forum['category']) { $url = url($forum['well_alias'], '', FALSE); } elseif (2 == $forum['category']) { // 单页 $url = ($forum['threads'] && $forum['brief']) ? url($forum['well_alias'] . '-' . trim($forum['brief']), '', FALSE) : url($forum['well_alias'], '', FALSE); } } return $url; } function well_forum_alias() { $forumlist = forum_list_cache(); if (empty($forumlist)) return ''; $key = 'forum-alias'; static $cache = array(); if (isset($cache[$key])) return $cache[$key]; $cache[$key] = array(); foreach ($forumlist as $val) { if ($val['well_alias']) $cache[$key][$val['fid']] = $val['well_alias']; } return array_flip($cache[$key]); } function well_forum_alias_cache() { global $conf; $key = 'forum-alias-cache'; static $cache = array(); // 用静态变量只能在当前 request 生命周期缓存,跨进程需要再加一层缓存:redis/memcached/xcache/apc if (isset($cache[$key])) return $cache[$key]; if ('mysql' == $conf['cache']['type']) { $arr = well_forum_alias(); } else { $arr = cache_get($key); if (NULL === $arr) { $arr = well_forum_alias(); !empty($arr) AND cache_set($key, $arr); } } $cache[$key] = empty($arr) ? '' : $arr; return $cache[$key]; } ?>Javascript calculating sum of a HTML table column with For loop - Stack Overflow
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Javascript calculating sum of a HTML table column with For loop - Stack Overflow

programmeradmin9浏览0评论

I have this Javascript problem I cannot solve. My code is:

<script type="text/javascript">
var l=liste.rows.length;    
var i;    
var den=0    
for (i=0;i<=l;i++)  
{  
den=parseInt(liste.rows[i].cells[7].innerHTML)  
den+=den  
}  
alert(den)  
</script>

When I put alert(den) inside the bracket code works for each step. But when I put it outside the bracket I can't have an alert box, couldn't figure out why. Can anybody help me?

I have this Javascript problem I cannot solve. My code is:

<script type="text/javascript">
var l=liste.rows.length;    
var i;    
var den=0    
for (i=0;i<=l;i++)  
{  
den=parseInt(liste.rows[i].cells[7].innerHTML)  
den+=den  
}  
alert(den)  
</script>

When I put alert(den) inside the bracket code works for each step. But when I put it outside the bracket I can't have an alert box, couldn't figure out why. Can anybody help me?

Share Improve this question edited Jun 18, 2017 at 9:15 Brian Tompsett - 汤莱恩 5,89372 gold badges61 silver badges133 bronze badges asked Dec 31, 2010 at 11:21 AlbertAlbert 31 silver badge3 bronze badges 1
  • 3 Don't forget to add the radix to the parseInt, otherwise you might get weird results if your values happen to start with 0. => parseInt(value, 10);. – Tatu Ulmanen Commented Dec 31, 2010 at 11:30
Add a ment  | 

2 Answers 2

Reset to default 6

You are overwritting den each iteration, change to this:

<script type="text/javascript">
    var l=liste.rows.length;
    var i;
    var den=0;
    for (i=0;i<l;i++) {
        den += parseInt(liste.rows[i].cells[7].innerHTML, 10);
    }
    alert(den);
</script>

edit: according to Tatu Ulmanen's ment I add radix to parseInt, this one drove me crazy a couple of months ago xD

You must assure first that the text is integer indeed the do the summation,

TryParseInt will do that for you.

function TryParseInt(str,defaultValue)
{     
  var retValue = defaultValue;
  if(str!=null)
  {
    if(str.length>0)
    {
       if (!isNaN(str))
       {
          retValue = parseInt(str);
       }
     }
  }     

return retValue; 
}

var den = 0;
for (var i=0; i<=liste.rows.length; i++)
{
   den += TryParseInt(liste.rows[i].cells[7].innerHTML,0);
}
alert(den);

Reference

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