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Passing arguments to an interactive program non-interactively
...y simulates a user, you can code a script how to react to specific program outputs and related stuff.
This also works in cases like ssh that prohibits piping passwords to it.
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How to upload, display and save images using node.js and express [closed]
... you can choose from one of the many available multipart/form-data parsers out there. Here, I'll be using multer:
You need to define a route to handle form posts:
const multer = require("multer");
const handleError = (err, res) => {
res
.status(500)
.contentType("text/plain")
.end(...
tag vs tag
...at
behaviour is not defined anywhere. While you can in theory leave it
out and assume it will be interpreted as JavaScript, it's invalid
HTML, so why not add it.
In HTML 5, the type attribute is optional and defaults to
text/javascript
Use <script type="text/javascript"> or simp...
How to convert char to int?
...
I agree, I can't figure out why it returns 'double' - how can a single character possibly represent a floating-point number?
– Joel Mueller
Sep 8 '10 at 16:25
...
How to place and center text in an SVG rectangle
...
Run your own code snippet. It doesn't work. Check it out: It even doesn't work in the preview provided by stackoverflow itself. As stated before in the comment dominant-baseline indeed needs to be used. I'm sorry, but this answer is somehow misleading. As it doesn't seem to wor...
Java Regex Capturing Groups
...tcher matcher = pattern.matcher(line);
while (matcher.find()) {
System.out.println("group 1: " + matcher.group(1));
System.out.println("group 2: " + matcher.group(2));
System.out.println("group 3: " + matcher.group(3));
}
Output:
group 1: This order was placed for QT
group 2: 3000
gr...
Calling virtual functions inside constructors
...rchy.
class Base {
public:
Base() { f(); }
virtual void f() { std::cout << "Base" << std::endl; }
};
class Derived : public Base
{
public:
Derived() : Base() {}
virtual void f() { std::cout << "Derived" << std::endl; }
};
int main() {
Derived d;
}
// outputs:...
Pandas percentage of total with groupby
...groupby(['state', 'office_id'])['sales'].sum().rename("count")
In [12]: c
Out[12]:
state office_id
AZ 2 925105
4 592852
6 362198
CA 1 819164
3 743055
5 292885
CO 1 525994
3 ...
Regex Named Groups in Java
...ne mentions in his answer, Java 7 now support named groups.
tchrist points out in the comment that the support is limited.
He details the limitations in his great answer "Java Regex Helper"
Java 7 regex named group support was presented back in September 2010 in Oracle's blog.
In the official re...
How to override Backbone.sync?
I'm trying out Backbone.js, and one of the things I'm trying is to make a call to a remote API, so I need to be able to override Backbone.sync, as I understand the documentation .
...