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Are foreign keys really necessary in a database design?
As far as I know, foreign keys (FK) are used to aid the programmer to manipulate data in the correct way. Suppose a programmer is actually doing this in the right manner already, then do we really need the concept of foreign keys?
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PHPExcel auto size column width
...If a column is set to AutoSize, PHPExcel attempts to calculate the column width based on the calculated value of the column (so on the result of any formulae), and any additional characters added by format masks such as thousand separators.
By default, this is an estimated width: a more accurate c...
Checking if a blob exists in Azure Storage
...way to check for existence
No, you're not missing something simple... we did a good job of hiding this method in the new StorageClient library. :)
I just wrote a blog post to answer your question: http://blog.smarx.com/posts/testing-existence-of-a-windows-azure-blob.
The short answer is: use Clou...
Detecting when user has dismissed the soft keyboard
I have an EditText widget in my view. When the user selects the EditText widget, I display some instructions and the soft keyboard appears.
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Capitalize first letter. MySQL
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thanks - that did what I needed. I forgot to mention that I needed to set to lower case first. thanks
– Chin
Nov 24 '10 at 4:13
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What is the use of the @Temporal annotation in Hibernate?
...poral annotation may be used in conjunction with the Basic annotation, the Id annotation, or the ElementCollection annotation (when the element collection value is of such a temporal type.
In plain Java APIs, the temporal precision of time is not defined. When dealing with temporal data, you might...
Mongoose populate after save
...k) {
book
.populate('_creator')
.populate('/* Some other ObjectID field */', function(err, book) {
// Do something
})
});
But don't be silly, like me, and try to do this:
book.save(function(err, book) {
book
.populate('_creator')
.populate('/* Some other ObjectID...
JavaScript listener, “keypress” doesn't detect backspace?
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The keypress event might be different across browsers.
I created a Jsfiddle to compare keyboard events (using the JQuery shortcuts) on Chrome and Firefox. Depending on the browser you're using a keypress event will be triggered or not -- backspace will trigger keydown/keypress/keyup on Firefox ...
Update a submodule to the latest commit
...bmodule update when someone else updated the projA(you'll get a new commit id).
– Kjuly
Nov 19 '11 at 3:09
i own the s...
dropping infinite values from dataframes in pandas?
...the subset and how arguments of dropna , except with inf values considered missing, like:
7 Answers
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