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How to write log to file
...lt logger in Go writes to stderr (2).
./app 2>> logfile
See also: http://12factor.net/logs
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MFC学习总结 (90个技巧) dlg 上建立View - C/C++ - 清泛网 - 专注C++内核技术
...在相应的控件上移动时显示提示文字
"m_tip[1].UpdateTipText("http://vckbase.com",pSub[1]);
[page]删除文件夹[/page]17.删除文件夹
// 删除文件夹及其所有内容
void CBaseDoc::RemoveFolder(const CString &strPathName)
{
CString path = strPathName;
if ...
is not JSON serializable
...objects:
data = serializers.serialize('json', self.get_queryset())
return HttpResponse(data, content_type="application/json")
In your case, self.get_queryset() contains a mix of django objects and dicts inside.
One option is to get rid of model instances in the self.get_queryset() and replace th...
How to import a module given its name as string?
...mand" modules makes his/her whole command-app fail on one exception. Personally I'd for loop over each import individually wrapped in a try: mods=__import__()\nexcept ImportError as error: report(error) to allow other commands to continue to work while the bad ones get fixed.
–...
What is the instanceof operator in JavaScript?
...ce p inherits from Person.prototype.
Per the OP's request
I've added a small example with some sample code and an explanation.
When you declare a variable you give it a specific type.
For instance:
int i;
float f;
Customer c;
The above show you some variables, namely i, f, and c. The type...
detach all packages while working in R
...*) is not necessary but can be useful to prevent the NULL reply from vertically spamming the R window.
(edit: 9/20/2019) In version 3.6.1
It may be helpful to convert loaded only names(sessionInfo()$loadedOnly) to explicitly attached packages first, and then detach the packages, as so.
lapply(names(...
How to call a parent method from child class in javascript?
...Here's how its done: ParentClass.prototype.myMethod();
Or if you want to call it in the context of the current instance, you can do:
ParentClass.prototype.myMethod.call(this)
Same goes for calling a parent method from child class with arguments:
ParentClass.prototype.myMethod.call(this, arg1, arg2...
Length of a JavaScript object
...a plugin is equally accessible:
$.assocArraySize = function(obj) {
// http://stackoverflow.com/a/6700/11236
var size = 0, key;
for (key in obj) {
if (obj.hasOwnProperty(key)) size++;
}
return size;
};
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MySQL Orderby a number, Nulls last
...ues last but otherwise the same as position ASC.
A good reference is here http://troels.arvin.dk/db/rdbms#select-order_by
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Installing Google Protocol Buffers on mac
I would like to install the older version of Google Protocol Buffers (protobuf-2.4.1) on mac using Terminal command line. I tried with brew install protobuf , but the latest version 2.5.0 has been installed. Is it possible to install the older version from terminal.
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