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How to read data when some numbers contain commas as thousand separator?
...u can have read.table or read.csv do this conversion for you semi-automatically. First create a new class definition, then create a conversion function and set it as an "as" method using the setAs function like so:
setClass("num.with.commas")
setAs("character", "num.with.commas",
function(...
The static keyword and its various uses in C++
...that I find very confusing and I can never bend my mind around how its actually supposed to work.
9 Answers
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Pandas: Looking up the list of sheets in an excel file
...eet_names attribute):
xl = pd.ExcelFile('foo.xls')
xl.sheet_names # see all sheet names
xl.parse(sheet_name) # read a specific sheet to DataFrame
see docs for parse for more options...
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C# DateTime.Now precision
...ith DateTime.UtcNow while doing some unit tests. It appears that when you call DateTime.Now/UtcNow in rapid succession, it seems to give you back the same value for a longer-than-expected interval of time, rather than capturing more precise millisecond increments.
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Search text in stored procedure in SQL Server
I want to search a text from all my database stored procedures. I use the below SQL:
22 Answers
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Can I squash commits in Mercurial?
I have a pair of commits that should really be just one. If I was using git, I would use:
8 Answers
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Package doesn't exist error in intelliJ
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I tried to "Maven > Reimport" but the only thing that actually fixed it was to close the project, delete the .idea directory, and reopen the project.
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How do I show my global Git configuration?
I'd like to show all configured Git sections.
12 Answers
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Which is more efficient: Multiple MySQL tables or one large table?
I store various user details in my MySQL database. Originally it was set up in various tables meaning data is linked with UserIds and outputting via sometimes complicated calls to display and manipulate the data as required. Setting up a new system, it almost makes sense to combine all of these tabl...
Running shell command and capturing the output
...True at the end of this answer.
The check_output function works on almost all versions of Python still in wide use (2.7+).2 But for more recent versions, it is no longer the recommended approach.
Modern versions of Python (3.5 or higher): run
If you're using Python 3.5 or higher, and do not need ...