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How do I partially update an object in MongoDB so the new object will overlay / merge with the exist
...ot make any sense whatsoever. When dealing with mongo it is preferred also for updates to have atomic operations. First reading it causes a dirty read whenever someone else changes your data. And since mongo has no transactions, it will happily corrupt the data for you.
– frogi...
Image Greyscale with CSS & re-color on mouse-over?
...amp; Safari 6+ */
-webkit-transition: all .6s ease;
/* Fade to color for Chrome and Safari */
-webkit-backface-visibility: hidden;
/* Fix for transition flickering */
}
img.grayscale:hover {
filter: none;
-webkit-filter: grayscale(0%);
}
svg {
background: url(http://4.bp...
Why would $_FILES be empty when uploading files to PHP?
...ing Apache 2.2.11 and PHP 5.2.11. When I attempt to upload any file from a form, it seems to upload, but in PHP, the $_FILES array is empty. There is no file in the c:\wamp\tmp folder. I have configured php.ini to allow file uploads and such. The tmp folder has read/write privileges for the ...
GridCtrl 控件FAQ - C/C++ - 清泛网 - 专注C/C++及内核技术
...mnNum];
nWidth[0]=60;
nWidth[1]=120;
nWidth[2]=120;
for(int i=0; i<m_ nColumnNum; i++)
m_Grid.SetColumnWidth(i, nWidth[i]);
i=0;
m_Grid.SetItemText(0,i++,"第一列");
m_Grid.SetItemText(0,i++,"第二列");
m_Grid.SetItemText(0,i++,"第三列");
...
How to save an image locally using Python whose URL address I already know?
...
Python 2
Here is a more straightforward way if all you want to do is save it as a file:
import urllib
urllib.urlretrieve("http://www.digimouth.com/news/media/2011/09/google-logo.jpg", "local-filename.jpg")
The second argument is the local path where the f...
ADB No Devices Found
...ownloaded the Android SDK, installed "Android SDK Tools", "Android SDK Platform-tools", and Google USB Driver. I have checked the setting on my Nexus 10 for "Unknown Sources".
...
Difference between “git checkout ” and “git checkout -- ”
...that begins with -, or is the same as the name of a branch. Some examples for branch/file disambiguation:
git checkout README # would normally discard uncommitted changes
# to the _file_ "README"
git checkout master # would normally switch the working copy to
...
What is the { get; set; } syntax in C#?
...
It's a so-called auto property, and is essentially a shorthand for the following (similar code will be generated by the compiler):
private string name;
public string Name
{
get
{
return this.name;
}
set
{
this.name = value;
}
}
...
How do you split a list into evenly sized chunks?
...e second list fills up, add it to the first list and empty the second list for the next round of data, but this is potentially extremely expensive.
...
Make absolute positioned div expand parent div height
As you can see in the CSS below, I want child2 to position itself before child1 . This is because the site I'm currently developing should also work on mobile devices, on which the child2 should be at the bottom, as it contains the navigation which I want below the content on the mobile devices...