这两个覆盖的索引之间有什么区别吗?
单独的MS SQL Server相关点.如果上述问题的答案是"没有区别",是我还是数据库引擎优化顾问(DTA)总是对包含的列疯狂?
这似乎是一件非常简单的事情,但我似乎无法让我领先.我有10个文件,名为1.txt到10.txt.我只想计算每个文档中的行数,最后计算行数的最终总和.
这就是我要去的地方.
for (int i = 1; i < 11; i++)
{
int lineCount = File.ReadLines(@i + ".txt").Count();
lineCount += lineCount;
Console.WriteLine("Total IDs: " + lineCount);
}
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更新 我的文档在它们的底部有回车符,我不想包含在计数中.
我有字典最新状态:
{'What': 10, "Study'": 10, 'all': 10, 'to': 10, "facebook'": 10, 'has': 10, 'worth': 20, 'hurting': 10 }
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我正在尝试通过在模板中执行以下操作来使文本云化:
{% for word,count in latest_status.items %}
<style="font-size:{{ count }}px"> {{ word }}</style>
{% endfor %}
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我正在尝试使用dict的计数来控制字体大小,但它似乎不起作用。
不使用javascript,是否有更好的方法来记住用户的单选按钮选择?我觉得我有一种很天真(?)的方式吗?
我怎样才能重写它以使它更干?usersegmentparem在提交后返回到同一页面.
{% if usersegment == "non-paying" %}
<input type="radio" name="usersegment" value="non-paying" checked="yes"/> Non-paying Users <br />
<input type="radio" name="usersegment" value="paying" /> Paying Users <br />
<input type="radio" name="usersegment" value="all" /> All Users<br />
{% endif %}
{% if usersegment == "paying" %}
<input type="radio" name="usersegment" value="non-paying" /> Non-paying Users <br />
<input type="radio" name="usersegment" value="paying" checked="yes"/> Paying Users <br />
<input type="radio" name="usersegment" value="all" /> All Users<br />
{% endif %}
{% if usersegment == "all" or …Run Code Online (Sandbox Code Playgroud) 无论如何,我可以减少我的论点的重复吗?例如,timepattern重复4次,很难跟踪大的查询.
sql = ( "SELECT IFNULL(b.inviters/COUNT(DISTINCT c.id),0), "
" FROM_UNIXTIME(c.registered_at, %s) "
"FROM ( SELECT COUNT(1) AS inviters, joindate "
" FROM "
" ( SELECT DISTINCT(y.id) AS inviters, "
" FROM_UNIXTIME(y.registered_at, %s) AS joindate "
" FROM user_invites z "
" INNER JOIN users y ON y.id = z.inviter_id "
" WHERE z.created_at >= %s "
" ) a "
" GROUP BY a.joindate "
" ) b "
"INNER JOIN users c ON FROM_UNIXTIME(c.registered_at, %s) = b.joindate " …Run Code Online (Sandbox Code Playgroud) 我仍然是javascript和jQuery的新手,只是想知道这一点.
假设我有这个HTML片段:
<p id="disclaimer">
Disclaimer! </p>
<input type="button" id="hideButton" value="hide" />
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我可以通过以下方式隐藏div:
$(document).ready(function() {
$('#hideButton').click(function() {
if ($('#disclaimer').css('display') == 'none') {
$('#disclaimer').show();
$('#hideButton').val('hide');
} else {
$('#disclaimer').hide();
$('#hideButton').val('unhide');
}
})
});
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要么
$(document).ready(function() {
$('#hideButton').click(function() {
if ($('#disclaimer').is(':visible')) {
$('#disclaimer').hide();
$('#hideButton').val('unhide');
} else {
$('#disclaimer').show();
$('#hideButton').val('hide');
}
})
});
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我的问题是:是否有一种隐藏div的首选方法或者仅仅是个人偏好的问题?
我有一段 HTML,将在多个地方使用。
{% if event.finished_payments %}
<span class="label label-success">Complete</span>
{% else %}
<span class="label label-important">Incomplete</span>
{% endif %}
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我想编写一个模板标签,它接受一个 bool 并返回<span class="label label-success">Complete</span>or<span class="label label-important">Incomplete</span>取决于参数是否True或False我认为看起来像这样:
{% tf_label event.finished_ payment %}
或者,是否有另一种方法可以使用include模板标签并传入参数来实现此目的?
我有这些数据:
inventory = { HAMMER: (10,100),
SCREW: (1, 1000),
NAIL: (1, 1000),
SCREWDRIVER: (8, 100),
DRILL: (50, 20),
WORKBENCH: (150, 5),
HANDSAW: (15, 50),
CHAINSAW: (80, 30)
}
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我写了以下这个函数:
def get_items(cheapness):
""" Return a list of (item, (price, count)) tuples that are the given
cheapness. Note that the second element of the tuple is another tuple. """
if cheapness == 'CHEAP':
return [(key, value) for (key,value) in inventory.items() if value in ((cost,quantity) for (cost, quantity) in inventory.values() if cost < …Run Code Online (Sandbox Code Playgroud) 我有以下模板:
<!DOCTYPE HTML PUBLIC "=//W3C//DTD HTML 4.01//EN">
<html land="en">
<head>
<title>Some Meta Data</title>
</head>
<body>
<ul>
{% for key,values in meta %}
<li> {{ key }}, {{ values }} </li>
{% endfor %}
</ul>
</body>
</html>
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和相应的views.py:
def display_meta(request):
meta = request.META.items()
metadata = []
for k,v in meta:
key = k
values = v
return render_to_response('meta.html', locals())
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如何重新编写上面的函数,使其不使用locals()?
基本上与SelectDate Widget相同,但也有一个小时组件.似乎无法在官方文档中找到一个?
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