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How to call an external command?
How do you call an external command (as if I'd typed it at the Unix shell or Windows command prompt) from within a Python script?
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Entity Framework 4 Single() vs First() vs FirstOrDefault()
I'm having a devil of a time finding a comparison of the different ways to query for a single item, and when to use each.
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Java Try Catch Finally blocks without Catch
...lock only. Since the catch block is excluded, how does the try block work if it encounters an exception or anything throwable? Does it just go directly to the finally block?
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Meaning of epsilon argument of assertEquals for double values
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@Emerald214 the amount of precision. If you want to assert that a double value is 0D epsilon would be 0 (100% accuracy, no exceptions). If you want a margin of error (say for degrees) you could set epsilon to 1 meaning that, for example, 64.2° is the same as 64...
How to properly override clone method?
...one is broken.
Josh Bloch on Design - Copy Constructor versus Cloning
If you've read the item about cloning in my book, especially if you read between the lines, you will know that I think clone is deeply broken. [...] It's a shame that Cloneable is broken, but it happens.
You may read more d...
twig: IF with multiple conditions
It seem I have problem with a twig if statement.
1 Answer
1
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How to use index in select statement?
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If you want to test the index to see if it works, here is the syntax:
SELECT *
FROM Table WITH(INDEX(Index_Name))
The WITH statement will force the index to be used.
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Pointer vs. Reference
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My rule of thumb is:
Use pointers if you want to do pointer arithmetic with them (e.g. incrementing the pointer address to step through an array) or if you ever have to pass a NULL-pointer.
Use references otherwise.
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How to dump a table to console?
...on: how do I go about installing an extension like pl.pretty? It's be nice if I could just do something like a gem install without futzing with unrolling tar balls and finding the ideal spot on my HD to situate things. Is there a quick/painless "do-it-this-way"?
– Cliff
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Definition of a Balanced Tree
I am just wondering if someone might be able to clarify the definition of a balanced tree for me. I have that "a tree is balanced if each sub-tree is balanced and the height of the two sub-trees differ by at most one.
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