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Useless use of cat?
... printf line isn't just another argument to sqlplus, it's an optional user-selectable output filter.
If there's any need to have multiple optional output filters, the option processing could just append | whatever to $filter as often as needed - one extra cat in the pipeline isn't going to hurt any...
SQL how to increase or decrease one for a int column in one command
...ndexes, you will not see a diff with the following SQL vs 1 statement.
IF (select top 1 * form x where PK=@ID)
Insert
else
update
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Get nodes where child node contains an attribute
... do the trick:
//book[descendant::title[@lang='it']]
This allows you to select all book elements that contain a child title element (regardless of how deep it is nested) containing language attribute value equal to 'it'.
I cannot say for sure whether or not this answer is relevant to the year 20...
What is the difference between required and ng-required?
...ld B - say, a student number - if the field A has a certain value - if you selected "student" as a choice)
As an example, <input required> and <input ng-required="true"> are essentially the same thing
If you are wondering why this is this way, (and not just make <input required="tru...
How to save a BufferedImage as a File
... that are installed and any of these names may be used as a format name to select an image writer.
For a full and practical example, one can refer to Oracle's SaveImage.java example.
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Why should I use a pointer rather than the object itself?
...m (especially when using IDEs or text editors that show the signature of a selected functions). Also, const&.
– JAB
Mar 3 '14 at 16:04
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Usage of __slots__?
...This message comes from the oldest protocol, which is the default. You can select the latest protocol with the -1 argument. In Python 2.7 this would be 2 (which was introduced in 2.3), and in 3.6 it is 4.
>>> pickle.loads(pickle.dumps(f, -1))
<__main__.Foo object at 0x1129C770>
in Py...
How should I ethically approach user password storage for later plaintext retrieval?
...sing a dictionary of 7776 words (as Diceware uses) which could be randomly selected for a six word passphrase, the passphrase would have an entropy of 77.4 bits. See the Diceware FAQ for more info.
a passphrase with about 77 bits of entropy: "admit prose flare table acute flair"
a password with ab...
What is the _snowman param in Ruby on Rails 3 forms for?
...orrectly concatenates the utf8 parameter and its value with the value of a selection option in the form.
– Christer Fernstrom
May 28 '14 at 16:30
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Example of multipart/form-data
... > a.html
Run:
nc -l localhost 8000
Open the HTML on your browser, select the files and click on submit and check the terminal.
nc prints the request received. Firefox sent:
POST / HTTP/1.1
Host: localhost:8000
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:29.0) Gecko/20100101 Fire...