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 - How to use d3.time.scale() to generate an array of evenly spaced dates? - Stack Overflow
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javascript - How to use d3.time.scale() to generate an array of evenly spaced dates? - Stack Overflow

programmeradmin8浏览0评论

This seems like it should be trivial. I want to use d3.time.scale() to get an array of evenly spaced dates that covers a certain range of time. For example, years

 [2012-01-01, 2013-01-01, 2014-01-01]

or months

 [2012-01-01, 2012-02-01, 2012-03-01 ... 2014-12-01]

or whatever.

So I start out like this:

var t = d3.time.scale()
    .domain(d3.extent(dates))
    .nice(d3.time.year);

I would then assume from the documentation that I'd be able to do this

var ticks = t.ticks(d3.time.month,1);

...but that just returns a single date.

This gives me an array of months

var ticks = t.ticks(30)

...but only because I told it roughly how many ticks to generate (30), which I won't know in advance (unless I do some heavy lifting on my own, which kind of defeats the purpose of using d3 for this).

I don't understand why it's not working to just tell it that I want every year, or every month, or every 3 months, or whatever.

I've put up a fiddle here: /

This seems like it should be trivial. I want to use d3.time.scale() to get an array of evenly spaced dates that covers a certain range of time. For example, years

 [2012-01-01, 2013-01-01, 2014-01-01]

or months

 [2012-01-01, 2012-02-01, 2012-03-01 ... 2014-12-01]

or whatever.

So I start out like this:

var t = d3.time.scale()
    .domain(d3.extent(dates))
    .nice(d3.time.year);

I would then assume from the documentation that I'd be able to do this

var ticks = t.ticks(d3.time.month,1);

...but that just returns a single date.

This gives me an array of months

var ticks = t.ticks(30)

...but only because I told it roughly how many ticks to generate (30), which I won't know in advance (unless I do some heavy lifting on my own, which kind of defeats the purpose of using d3 for this).

I don't understand why it's not working to just tell it that I want every year, or every month, or every 3 months, or whatever.

I've put up a fiddle here: http://jsfiddle/herbcaudill/LgGpd/4/

Share Improve this question edited Nov 24, 2013 at 21:37 Herb Caudill asked Nov 24, 2013 at 21:32 Herb CaudillHerb Caudill 50k40 gold badges127 silver badges178 bronze badges 1
  • Just to clarify, I'm not using this in conjunction with the axis object. I just want an array. – Herb Caudill Commented Nov 24, 2013 at 21:41
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2 Answers 2

Reset to default 5

Using the Date() constructor doesn't work reliably -- it basically depends on the browser. It's much safer to parse explicitly. The constructor doesn't parse as such.

Instead of

var dates = getDates().map(function(d) { return new Date(d) });

use this:

var dates = getDates().map(function(d) {
    return d3.time.format("%Y-%m-%d").parse(d);
});

Modified jsfiddle here.

Using a dataset such as

var dataset = [ 
      { "active" : false,
        "date" : "2014-12-12"
      },
      { "active" : true,
        "date" : "2014-12-13"
      },
      { "active" : true,
        "date" : "2014-12-14"
      },
      { "active" : true,
        "date" : "2014-12-15"
      }
    ]

var slicedData = var slicedData = dataset.slice();

I had a similar problem, and found that

var x = d3.time.scale()
    .domain([new Date(slicedData[0].date), new Date(slicedData[slicedData.length - 1].date)])
    .range([0,width]);

Dropped the first item in the scale (it still remains a mystery as to why that was the case), whereas

var dates = slicedData.map(function(d) {
        return d3.time.format("%Y-%m-%d").parse(d.date);
    });
    var t = d3.time.scale()
        .domain(d3.extent(dates))
        .range([0,width])
        .nice(d3.time.day);

worked fine.

So, my only explanation is the one Lars provided. Date() is unpredictable, so use d3.time.format instead.

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