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How to delete a row by reference in data.table?
...e quite inefficient compared to a row store database such as SQL, which is more suited for fast insert and delete of rows wherever those rows are in the table. But still, it would be a lot faster than copying a new large object without the deleted rows.
On the other hand, since column vectors would...
What is the most robust way to force a UIView to redraw?
...awn in the next draw cycle."
If what you need is "some logic, draw, some more logic," then you need to put the "some more logic" in a separate method and invoke it using -performSelector:withObject:afterDelay: with a delay of 0. That will put "some more logic" after the next draw cycle. See this q...
How to saveHTML of DOMDocument without HTML wrapper?
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Fixed page header overlaps in-page anchors
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Insert into a MySQL table or update if exists
...ncrement keys and other unique key collisions than REPLACE INTO, and it is more efficient.
– Andrew Ensley
May 11 '12 at 21:27
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SHA512 vs. Blowfish and Bcrypt [closed]
...sed hashes; because of its memory requirements, optimizing bcrypt requires more specialized hardware like FPGA with some on-board RAM.
Note: bcrypt is an algorithm that uses Blowfish internally. It is not an encryption algorithm itself. It is used to irreversibly obscure passwords, just as hash f...
How do I add a submodule to a sub-directory?
...odule add <git@github ...> snipmate-snippets/snippets/
If you need more information about submodules (or git in general) ProGit is pretty useful.
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Add regression line equation and R^2 on graph
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