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What is this crazy C++11 syntax ==> struct : bar {} foo {};?
...
struct foo { virtual void f() = 0; }; // normal abstract type
foo obj;
// error: cannot declare variable 'obj' to be of abstract type 'foo'
Let's also recall that we can instantiate the UDT at the same time that we define it:
struct foo { foo() { cout << "!"; } }; // just a defini...
Is there any reason to use a synchronous XMLHttpRequest?
... other code execution (e.g., preventing back button) could possibly reduce errors/maintenance for a poorly designed system; that said, I've never seen it in the wild and stress that it should be avoided.
Libraries, like promise, feign synchronicity by chaining processes via callbacks. This suits th...
Integrating Dropzone.js into existing HTML form with other fields
... console.log("Successfully uploaded :" + imgName);
},
error: function (file, response) {
file.previewElement.classList.add("dz-error");
}
});
});
Note : Disabling autoDiscover, otherwise Dropzone will try to attach twice
Blog Article : Dropzone js + A...
How to automatically convert strongly typed enum into int?
...automatic or 'silent' as Iammilind puts it. That prevents dificult to find errors. You can still do a cast but you are forced to think about it. That way you know what you're doing. To me it is part of a 'safe coding' habit. I prefer that no conversions are not done automatic is there is a sliver o...
GCC -fPIC option
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Yes, building a shared library that isn't PIC could be an error.
– John Zwinck
Mar 15 '11 at 12:31
94
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Labels for radio buttons in rails form
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this method also renders the field_with_errors div when necessary (that doesn't show up when using the :contactmethod_email method). this is the correct answer!
– caesarsol
Dec 3 '14 at 18:26
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Cannot truncate table because it is being referenced by a FOREIGN KEY constraint?
... I wouldn't suggest going this route, as you might also get this error: The DELETE statement conflicted with the REFERENCE constraint
– sksallaj
May 16 '17 at 17:39
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Django migration strategy for renaming a model and relationship fields
...ions.RenameField('YetAnotherModel', 'foo', 'bar')
]
You may get some errors if you don't update the names where it's imported e.g. admin.py and even older migration files (!).
Update: As ceasaro mentions, newer versions of Django are usually able to detect and ask if a model is renamed. So tr...
Why is nginx responding to any domain name?
...s run an 'nginx -t' to test the config before restarting - you may have an error preventing a restart.
– jwhitlock
Dec 12 '13 at 21:10
2
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How to change an application icon programmatically in Android?
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Error running app. Default activity not found.
– CopsOnRoad
Oct 15 '17 at 7:20
1
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