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Qt c++ aggregate 'std::stringstream ss' has incomplete type and cannot be defined
...xchange.using('gps', function() { StackExchange.gps.track('embedded_signup_form.view', { location: 'question_page' }); });
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How to get a vertical geom_vline to an x-axis of class date?
...ries from and would like to draw a vertical line for years 1998, 2005 and 2010 for example. I tried with ggplot and qplot syntax, but still I either see no vertical line at all or the vertical line is drawn at the very first vertical grid and the whole series is shifted somewhat strangely to the...
Java Generics: Cannot cast List to List? [duplicate]
...e a look at this section of Angelika Langer's Java Generics FAQ for more information.
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What is IP address '::1'?
... this -> 0000:0000:0000:0000:0000:0000:0000:0001 but we have some short form representation for this. If there are all zeroes in a single block you can replace it by single 0. So it becomes -> 0:0:0:0:0:0:0:0001.
Again we can see that we have runs of zeroes, they can be eliminated and we get
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How do you detect Credit card type based on number?
...rd: ^5[1-5][0-9]{5,}|222[1-9][0-9]{3,}|22[3-9][0-9]{4,}|2[3-6][0-9]{5,}|27[01][0-9]{4,}|2720[0-9]{3,}$ Before 2016, MasterCard numbers start with the numbers 51 through 55, but this will only detect MasterCard credit cards; there are other cards issued using the MasterCard system that do not fall in...
How do I redirect to another webpage?
...ng Internet Explorer 8 or lower, these variables get lost when using any form of JavaScript page redirection (location.href, etc.).
Below we are going to implement an alternative for IE8 & lower so that we don't lose HTTP_REFERER. Otherwise, you can almost always simply use window.location.hr...
In CSS what is the difference between “.” and “#” when declaring a set of styles?
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Classes are used where the style is repeated, e.g. say you head a special form of header for error messages, you could create a style h1.error {} which would only apply to <h1 class="error">
Specificity
Another aspect where selectors differ is in their specificity - an id selector is deemed...
How to open the default webbrowser using java
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is this a cross-platform solution or Windows only? other answers in this thread suggest to use the Runtime class for Linux
– isapir
Oct 23 '13 at 4:05
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bash: shortest way to get n-th column of output
Let's say that during your workday you repeatedly encounter the following form of columnized output from some command in bash (in my case from executing svn st in my Rails working directory):
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How to stop a goroutine
... the chan, you can make use of the "close" builtin and the special receive form for channels.
That is, once you're done sending items on the chan, you close it. Then inside your goroutine you get an extra parameter to the receive operator that shows whether the channel has been closed.
Here is a ...