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The type must be a reference type in order to use it as parameter 'T' in the generic type or method
...r into generics and now have a situation I need help with. I get a compile error on the 'Derived' class below as shown in the subject title. I see many other posts similar to this one but I'm not seeing the relationship. Can someone tell me how to resolve this?
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Officially, what is typename for?
On occasion I've seen some really indecipherable error messages spit out by gcc when using templates... Specifically, I've had problems where seemingly correct declarations were causing very strange compile errors that magically went away by prefixing the typename keyword to the beginning of the...
What's the difference between faking, mocking, and stubbing?
...urns a canned response, or that responds to an API request with a specific error. This way you could write tests that make assertions about how the system reacts to these states; for example, testing the response your users get if the API returns a 404 error.
A stub is usually implemented to only r...
Simplest code for array intersection in javascript
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There's numerous errors in intersect_safe: length is a property in Arrays, not a method. There's an undelared variable i in result.push(a[i]);. Finally, this simply doesn't work in the general case: two objects where neither is greater than t...
What's the advantage of a Java enum versus a class with public static final fields?
...constants, any value of the same intrinsic type could be used, introducing errors. With an enum only the applicable values can be used.
For example
public static final int SIZE_SMALL = 1;
public static final int SIZE_MEDIUM = 2;
public static final int SIZE_LARGE = 3;
public void setSize(int n...
PHP Redirect with POST data
... echo @stream_get_contents($fp);
die();
} else {
// Error
throw new Exception("Error loading '$url', $php_errormsg");
}
}
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Render HTML to an image
... = dataUrl;
document.appendChild(img);
})
.catch(function (error) {
console.error('oops, something went wrong!', error);
});
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Set custom HTML5 required field validation message
...ment (DOM node) and it must return a string which is then displayed as the error message.
Compatibility
Tested in:
Chrome Canary 47.0.2
IE 11
Microsoft Edge (using the up-to-date version as of 28/08/2015)
Firefox 40.0.3
Opera 31.0
Old answer
You can see the old revision here: https://stacko...
Doing something before program exit
...n of the script, but it won't get called in all cases (e.g. fatal internal errors).
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How to stop tracking and ignore changes to a file in Git?
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Very good answer. But git throws error when I try to switch to a different branch:error: "Your local changes to the following files would be overwritten by checkout ....." and the solution is to stash the changes before switching and un-stash when you come b...