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How to concatenate twice with the C preprocessor and expand a macro as in “arg ## _ ## MACRO”?
...then substituted into the replacement string:
EVALUATOR(mine, VARIABLE)
Now the macro EVALUATOR is discovered, and the arguments are isolated as 'mine' and 'VARIABLE'; the latter is then fully expanded to '3', and substituted into the replacement string:
PASTER(mine, 3)
The operation of this i...
When to use an interface instead of an abstract class and vice versa?
...hod" is that it's nearly always somewhat re-entrant - the "derived" class knows about not just the "abstract" method of its base class that it is implementing, but also about the public methods of the base class, even though most times it does not need to call them.
(Overly simplified) example:
ab...
How can I increment a date by one day in Java?
...ATE, 1); // number of days to add
dt = sdf.format(c.getTime()); // dt is now the new date
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Effects of changing Django's SECRET_KEY
... server-side in the same timing conditions as for comments form.
UPDATE: now working on django 1.9.5, a quick look at the source gives me pretty much the same answers. Might do a thorough inspection later.
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Can Json.NET serialize / deserialize to / from a stream?
...may want to include the version number this is still working on so people know when to scroll down.
– PoeHaH
Oct 24 '17 at 5:00
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Will HTML5 allow web apps to make peer-to-peer HTTP connections?
...
UPDATE 10/17/2012: This functionality now exists in Chrome Stable v22. In order to use this functionality in Chrome, one must enable two flags in chrome://flags:
Enable MediaStream
Enable PeerConnection
Then you can visit the AppRTC Demo Page to try out the d...
Best practices for in-app database migration for Sqlite
...updates in version 2,3,4. The end user only downloaded your version 1, and now upgrade to version 5. What should you do?
– Bagusflyer
Apr 10 '14 at 4:09
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React JSX: selecting “selected” on selected option
...ange={this.handleChange} />
)
}
}
included component (which is now a stateless functional):
export const ReactExample = ({ name, value, handleChange }) => (
<select name={name} value={value} onChange={handleChange}>
<option value="A">Apple</option>
<opt...
Has reCaptcha been cracked / hacked / OCR'd / defeated / broken? [closed]
... ones (or at least quickest) broken.
UPDATE: CAPTCHA Killer's website is now taken down, apparently under legal pressure. See http://captcha.org/ for a complete overview of the topic.
And yeah, OCR is not the best way to break a CAPTCHA protected site - there are many other better ways.
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How many parameters are too many? [closed]
...ndment guarantee to free speech? According to Justice Potter Stewart, "I know it when I see it." The same holds here.
I hate making hard and fast rules like this because the answer changes not only depending on the size and scope of your project, but I think it changes even down to the module lev...