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C# Lazy Loaded Automatic Properties
...ssion is called. It will only be calculated once and will cache the value for future uses of the Value property
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Proper use of beginBackgroundTaskWithExpirationHandler
... UIBackgroundTaskInvalid;
}
I have a UIBackgroundTaskIdentifier property for each background task
Equivalent code in Swift
func doUpdate () {
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), {
let taskID = beginBackgroundUpdateTask()
var resp...
Multiple Models in a single django ModelForm?
Is it possible to have multiple models included in a single ModelForm in django? I am trying to create a profile edit form. So I need to include some fields from the User model and the UserProfile model. Currently I am using 2 forms like this
...
Difference between RegisterStartupScript and RegisterClientScriptBlock?
...sterClientScriptBlock is that RegisterStartupScript puts the javascript before the closing </form> tag of the page and RegisterClientScriptBlock puts it right after the starting <form> tag of the page?
...
[完整源码实例] 修改 CListCtrl 的标题栏字体颜色；重绘 CListCtrl 标题栏 ...
...tFont(f);
//设置标题栏自绘
HDITEM hdItem;
hdItem.mask = HDI_FORMAT;
for(int i=0; i<m_HeaderCtrl.GetItemCount(); i++)
{
m_HeaderCtrl.GetItem(i,&hdItem);
hdItem.fmt|= HDF_OWNERDRAW;
m_HeaderCtrl.SetItem(i,&hdItem);
}
效果：
完整工程源码下载：CHeaderCt...
搭建高可用mongodb集群（一）——配置mongodb - 大数据 & AI - 清泛网 - 专...
...！
[initandlisten] db version v2.4.6
……..
[initandlisten] waiting for connections on port 27017
[websvr] admin web console waiting for connections on port 28017
mongodb默认自带提供了web访问接口，通过 IP + 端口的形式可以访问。
http://192.168.0.1:28017/
二、主...
Error handling in Bash
...s predictability and portability).
You can either let the trap call error for you (in which case it uses the default exit code of 1 and no message) or call it yourself and provide explicit values; for instance:
error ${LINENO} "the foobar failed" 2
will exit with status 2, and give an explicit m...
How to implement “select all” check box in HTML?
...ction toggle(source) {
checkboxes = document.getElementsByName('foo');
for(var checkbox in checkboxes)
checkbox.checked = source.checked;
}
</script>
<input type="checkbox" onClick="toggle(this)" /> Toggle All<br/>
<input type="checkbox" name="foo" value="bar1"> Bar...
How can I uninstall an application using PowerShell?
...
Note that looking at WMI will only work for products that were installed via an MSI.
– EBGreen
Sep 22 '08 at 15:24
7
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How to programmatically show next view in ViewPager?
...
Unfortunately I do get different behavior, when the user swipes manually and when I jump using setCurrentItem. The order of calls is reversed. When I swipe, it first calls OnPageChangeListener#onPageSelected and then it calls s...