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iOS Simulator failed to install the application
...tor and from the "iOS Simulator" menu, click "Reset content and settings", then close and rebuild your app.
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Getting a better understanding of callback functions in JavaScript
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Why do you cast callback to string and then check its type? Will this enhance performance? This is like checking the type, checking if the converted boolean returns true and then checking its type again and testing it against the string... Could you explain why?
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How to leave/exit/deactivate a Python virtualenv
... I didn't need source. I did $cd /to/dir/i/want/my/virtualenv/installed then $virtualenv name_i_want_for_it then $. name_i_want_for_it/bin/activate virtualenv still seems a bit off to me. Needs to be improved...
– uchuugaka
Dec 28 '15 at 8:32
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What does the “===” operator do in Ruby? [duplicate]
...particular, one would expect equality to be symmetric: if a is equal to b, then b better be also equal to a. Also, one would expect equality to be transitive: if a == b and b == c, then a == c. While there is no way to actually guarantee that in a single-dispatch language like Ruby, you should at le...
Pure JavaScript: a function like jQuery's isNumeric() [duplicate]
...d the note in the answer stating parseInt was the wrong way of doing this (then going ahead and using parseFloat, which doesn't really seem different). Interestingly isFinite will get you the result you're after in almost all cases on its own (apart from whitespace strings, which for some reason ret...
encryption/decryption with multiple keys
...he encryption mechanism:
GPG encrypts the file once with a symmetric key, then places a header
identifying the target keypair and an encrypted version of the
symmetric key.
[...] When encrypted to multiple recipients, this
header is placed multiple times providing a uniquely encrypted version
of th...
How can I catch a 404?
...Response. If the code wishes to assume that it will always have that type, then it should simply cast: HttpWebResponse errorResponse = (HttpWebResponse)we.Response;. This will throw an explicit InvalidCastException if the impossible happens, instead of a mysterious NullReferenceException.
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How do I test a camera in the iPhone simulator?
...er version of the OS set in your deployment target, guess you'd be screwed then.
– marchinram
Dec 15 '10 at 4:03
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R: += (plus equals) and ++ (plus plus) equivalent from c++/c#/java, etc.?
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This function cannot return the value and then increment like a postincrement ++. It's more similar to += or preincrement ++.
– Megatron
Jul 10 '15 at 18:52
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Do htmlspecialchars and mysql_real_escape_string keep my PHP code safe from injection?
...ngle query string. However, if you do not sanitise your inputs beforehand, then you will be vulnerable to certain attack vectors.
Imagine the following SQL:
$result = "SELECT fields FROM table WHERE id = ".mysql_real_escape_string($_POST['id']);
You should be able to see that this is vulnerable ...