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What does dot (.) mean in a struct initializer?
...der -- which still works, of course.
So for the following struct:
struct demo_s {
int first;
int second;
int third;
};
...you can use
struct demo_s demo = { 1, 2, 3 };
...or:
struct demo_s demo = { .first = 1, .second = 2, .third = 3 };
...or even:
struct demo_s demo = {...
Subscripts in plots in R
...x in R plotting: For more information see the ?plotmath help page. Running demo(plotmath) will showcase many expressions and relevant syntax.
Remember to use * to join different types of text within an expression.
Here is some of the sample output from demo(plotmath):
...
Drawing a connecting line between two elements [closed]
...s an option available that supports drag and drop, as seen by its numerous demos, including the Flowchart demo.
It is available in a free Community edition, and a paid Toolkit edition.
The Toolkit edition wraps the Community edition with a comprehensive data binding layer, as well as several UI...
how to use XPath with XDocument?
...Load(fileName);
var name = document.Descendants(XName.Get("Name", @"http://demo.com/2011/demo-schema")).First().Value;
If you are sure that XPath is the only solution you need:
using System.Xml.XPath;
var document = XDocument.Load(fileName);
var namespaceManager = new XmlNamespaceManager(new Nam...
Regular expression to match balanced parentheses
...)]+|\)(?<-c>))*(?(c)(?!))\)
Where c is used as the depth counter.
Demo at Regexstorm.com
Stack Overflow: Using RegEx to balance match parenthesis
Wes' Puzzling Blog: Matching Balanced Constructs with .NET Regular Expressions
Greg Reinacker's Weblog: Nested Constructs in Regular Expression...
sqlite database default time value 'now'
...use "%s" (double-quotes) threw a 'Not Constant' error on me.
Create Table Demo (
idDemo Integer Not Null Primary Key AutoIncrement
,DemoValue Text Not Null Unique
,DatTimIns Integer(4) Not Null Default (strftime('%s', DateTime('Now', 'localtime'))) -- get Now/UTC, convert to loca...
Is it possible to print a variable's type in standard C++?
...fix(prefix.size());
name.remove_suffix(suffix.size());
return name;
}
Demo.
Similarly, to get the enum name at compile-time, if you like :)
#include <string_view>
template <auto E>
constexpr auto enum_name() noexcept {
static_assert(std::is_enum_v<decltype(E)>);
std::stri...
www-data permissions?
...dding the main user to the Apache user group:
sudo usermod -a -G www-data demo
That adds the user 'demo' to the 'www-data' group. Do ensure you use
both the -a and the -G options with the usermod command shown above.
You will need to log out and log back in again to enable the group
...
How do you read from stdin?
...ad())" < inputs.txt
Longer answer
Here's a complete, easily replicable demo, using two methods, the builtin function, input (use raw_input in Python 2), and sys.stdin. The data is unmodified, so the processing is a non-operation.
To begin with, let's create a file for inputs:
$ python -c "print(...
Personal Image Classifier (PIC) 拓展：自行训练AI图像识别模型，开发图像...
...进行识别和分类PersonalImageClassifier (PIC) 拓展的用法请参考demo，或直接看英文文档自行研究，这里暂时不做展开，文档如下：https://www.hackster.io/mjrobot/app-inventor-edgeml-image-classification-fruits-vs-veggies-b671da
拓展及demo请至文档原文进行...