大约有 42,000 项符合查询结果（耗时：0.0426秒） [XML]
Add new field to every document in a MongoDB collection
...> db.foo.find()
> db.foo.insert({"test":"a"})
> db.foo.find()
{ "_id" : ObjectId("4e93037bbf6f1dd3a0a9541a"), "test" : "a" }
> item = db.foo.findOne()
{ "_id" : ObjectId("4e93037bbf6f1dd3a0a9541a"), "test" : "a" }
> db.foo.update({"_id" :ObjectId("4e93037bbf6f1dd3a0a9541a") },{$set : ...
Which UUID version to use?
Which version of the UUID should you use? I saw a lot of threads explaining what each version entails, but I am having trouble figuring out what's best for what applications.
...
NOT IN vs NOT EXISTS
...are unlikely to be the ones you want anyway.
When neither Products.ProductID or [Order Details].ProductID allow NULLs the NOT IN will be treated identically to the following query.
SELECT ProductID,
ProductName
FROM Products p
WHERE NOT EXISTS (SELECT *
FROM [Order D...
Add and Remove Views in Android Dynamically?
How do I add and remove views such as TextView s from Android app like on the original stock Android contacts screen where you press a small icon on the right side of a field and it adds or deletes a field which consists of a TextView and an editTextView (from what I can see).
...
Call two functions from same onclick [duplicate]
... the end of the function calls in order for them both to work.
<input id="btn" type="button" value="click" onclick="pay(); cls();"/>
I don't believe the last one is required but hey, might as well add it in for good measure.
Here is a good reference from SitePoint http://reference.sitepoi...
Linux chmod命令用法 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...rmission
r
读
w
写
x
执行
s
设置用户(或组)的ID号
t
设置粘着位(sticky bit)，防止文件或目录被非属主删除
u
用户的当前权限
g
组的当前权限
o
其他用户的当前权限
作为选择，我们多数用三位八进制数...
Can an Option in a Select tag carry multiple values?
...ecurity problem in his code while evaluating the input. The best way to avoid this is using JSON, as suggested by @DavidHoerster, because the input is better behaved.
– fotanus
Aug 27 '13 at 19:10
...
jQuery UI Dialog with ASP.NET button postback
...true,
show: 'Transfer',
hide: 'Transfer',
width: 320,
autoOpen: false,
minHeight: 10,
minwidth: 10
});
dlg.parent().appendTo(...
Javascript checkbox onChange
...
function calc()
{
if (document.getElementById('xxx').checked)
{
document.getElementById('totalCost').value = 10;
} else {
calculate();
}
}
HTML
<input type="checkbox" id="xxx" name="xxx" onclick="calc();"/>
...
How to remove the border highlight on an input text element
...
In your case, try:
input.middle:focus {
outline-width: 0;
}
Or in general, to affect all basic form elements:
input:focus,
select:focus,
textarea:focus,
button:focus {
outline: none;
}
In the comments, Noah Whitmore suggested taking thi...