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Practical non-image based CAPTCHA approaches?
...quite a good idea and is exactly the same as doing it in JavaScript. Good Call.
@AviD: I'm aware that this method is prone to direct attacks as I've mentioned on my blog. However, it will defend against your average spam bot which blindly submits rubbish to any form it can find.
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What is an OS kernel ? How does it differ from an operating system? [closed]
...ernel is an operating system in that sense.
The end-user definition is usually something around "a software package that provides a desktop, shortcuts to applications, a web browser and a media player". A kernel doesn't match that definition.
So for an end-user a Linux distribution (say Ubuntu) is...
Hash Code and Checksum - what's the difference?
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@gumbo: no, not every hashcode is a checksum. See string example from MSalters below.
– MarcH
Mar 17 '16 at 16:18
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When to choose checked and unchecked exceptions
...n what layer the caller of your API is located.
Let's say that I create a StringToInt API that converts the string representation of an integer to an Int. Must I throw a checked exception if the API is called with the "foo" string ? Is it recoverable ? I don't know because in his layer the caller o...
MVC DateTime binding with incorrect date format
...n a specific order namely:
RouteData (not shown above)
URI query string
Request form
Only the last of these will be culture aware however. There is a very good reason for this, from a localization perspective. Imagine that I have written a web application showing airline flight i...
Modulo operation with negative numbers
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C99 requires that when a/b is representable:
(a/b) * b + a%b shall equal a
This makes sense, logically. Right?
Let's see what this leads to:
Example A. 5/(-3) is -1
=> (-1) * (-3) + 5%(-3) = 5
This can only happen if 5%(-3) is 2.
Example B. (-5)/3 is -1
=> (-1) * 3 + (-5...
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 13: ordinal not in range(128)
... in Python 3, the decode method remains the preferred way to decode a byte string to a Unicode string. (Though, the types in my answer are not right for Python 3 -- for Python 3, we're trying to convert from bytes to str rather than from str to unicode.)
– icktoofay
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How do I “un-revert” a reverted Git commit?
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Please note this will remove all changes in working tree and index. Use git stash to save any changes you don't wan't to lose.
– zpon
Aug 30 '16 at 5:37
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Is SQL syntax case sensitive?
...double quote>), considered as
the repetition of a <character string literal> that specifies a
<character set specification> of SQL_TEXT and an implementation-
defined collation that is sensitive to case, compare equally
according to the comparison rules...
How do I use su to execute the rest of the bash script as that user?
I've written a script that takes, as an argument, a string that is a concatenation of a username and a project. The script is supposed to switch (su) to the username, cd to a specific directory based upon the project string.
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