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Is there a performance difference between i++ and ++i in C?
...ow this question is about C, but I'd be interested to know if browsers can do this optimization for javascript.
– TM.
Aug 12 '09 at 21:58
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Add Bootstrap Glyphicon to Input Box
...p in a second, but here's the fundamental CSS concepts in play in order to do this yourself. As beard of prey points out, you can do this with CSS by absolutely positioning the icon inside of the input element. Then add padding to either side so the text doesn't overlap with the icon.
So for the ...
How to quickly check if folder is empty (.NET)?
I have to check, if directory on disk is empty. It means, that it does not contain any folders/files. I know, that there is a simple method. We get array of FileSystemInfo's and check if count of elements equals to zero. Something like that:
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Use Expect in a Bash script to provide a password to an SSH command
...sh script to provide the SSH password. Providing the password works, but I don't end up in the SSH session as I should. It goes back strait to Bash.
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How to validate phone numbers using regex
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This is good and all, but it doesn't validate what was entered was actually a phone number. For example, what if the user doesn't enter the requisite 10 digits? This should be combined with good regex validation.
– Hugh Jeffner
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What is the naming convention in Python for variable and function names?
... @RickyRobinson What brain-dead code editor are you using, that doesn't know that underscore continues a word? Lots of free ones that do. I use Notepad++, if an IDE isn't available. For that, can download a template for python editing. (Others can recommend even more useful free downloads...
Make a borderless form movable?
...order (FormBorderStyle is set to "none") movable when the mouse is clicked down on the form just as if there was a border?
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How to get number of entries in a Lua table?
...answer. The Lua # operator only counts entries with integer keys, and so does table.getn :
8 Answers
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Convert data.frame columns from factors to characters
...ere. Clearly, creating things correctly up front is the best solution. I don't think that it's easy to automatically convert data types across a data frame. One option is to use the above but then use type.convert after casting everything to character, then recast factors back to character again....