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Speed up the loop operation in R
... The data.frame has roughly 850K rows. My PC is still working (about 10h now) and I have no idea about the runtime.
10 An...
Does const mean thread-safe in C++11?
...ration --at least not in respect to data races--.
Does that mean const is now the equivalent of Java's synchronized?
No. Not at all...
Consider the following overly simplified class representing a rectangle:
class rect {
int width = 0, height = 0;
public:
/*...*/
void set_size( int ne...
Apply CSS styles to an element depending on its child elements
...ion which is "Is there a way to do this with CSS". It clearly states: "I know I can achieve this using javascript, but I just wondered whether this is possible using some unknown (to me) CSS features."
– SunshinyDoyle
Aug 28 '18 at 14:27
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OSX - How to auto Close Terminal window after the “exit” command executed.
When I'm done with Terminal, I want to exit it. Right now, I have three options:
14 Answers
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How do I debug error ECONNRESET in Node.js?
...ght exception since your data, application, and node.js itself is in an unknown state. Continuing after an exception puts your data a risk. If you want to find out more, check out Node's docs on process or Node's docs on domains.
– c1moore
Aug 31 '15 at 0:10
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No tests found with test runner 'JUnit 4'
My Java test worked well from Eclipse. But now, when I relaunch test from the run menu, I get the following message:
41 An...
How to detect if a function is called as constructor?
...
NOTE: This is now possible in ES2015 and later. See Daniel Weiner's answer.
I don't think what you want is possible [prior to ES2015]. There simply isn't enough information available within the function to make a reliable inference.
Look...
Drawing a connecting line between two elements [closed]
...visit https://api.jquery.com/position/ (you can use offset() method too)
Now as we have obtained all the positions we need we can draw line as follows...
line1
.attr('x1', pos1.left)
.attr('y1', pos1.top)
.attr('x2', pos2.left)
.attr('y2', pos2.top);
jQuery .attr() method is used to cha...
CSS last-child selector: select last-element of specific class, not last child inside of parent?
...This is actually applying the class to the LAST instance only because it's now in reversed order.
Here is a working example for you:
<!doctype html>
<head><title>CSS Test</title>
<style type="text/css">
.some-class { margin: 0; padding: 0 20px; list-style-type: square...
Multiple constructors in python? [duplicate]
...d
def fromfilename(cls, name):
return cls(open(name, 'rb'))
# Now you can do:
c = C(fd)
# or:
c = C.fromfilename('a filename')
Notice all those classmethods still go through the same __init__, but using classmethods can be much more convenient than having to remember what combinations...