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Comparing two dataframes and getting the differences
... lists, to do it efficiently we should first order them then compare them (converting the list to sets/hashing would also be fast; both are an incredible improvement to the simple O(N^2) double comparison loop
Note: the following code produces the tables:
df1=pd.DataFrame({
'Date':['2013-11-24...
How to get the start time of a long-running Linux process?
...ticks since system boot.1
This is a slightly tricky unit to use; see also convert jiffies to seconds for details.
awk -v ticks="$(getconf CLK_TCK)" 'NR==1 { now=$1; next }
END { printf "%9.0f\n", now - ($20/ticks) }' /proc/uptime RS=')' /proc/12345/stat
This should give you seconds, which yo...
How do I implement an Objective-C singleton that is compatible with ARC?
How do I convert (or create) a singleton class that compiles and behaves correctly when using automatic reference counting (ARC) in Xcode 4.2?
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Get Enum from Description attribute [duplicate]
...ameof(description));
// Or return default(T);
}
}
Usage:
var panda = EnumEx.GetValueFromDescription<Animal>("Giant Panda");
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What does this symbol mean in JavaScript?
This is a collection of questions that come up every now and then about syntax in JavaScript. This is also a Community Wiki, so everyone is invited to participate in maintaining this list.
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Trimming a huge (3.5 GB) csv file to read into R
So I've got a data file (semicolon separated) that has a lot of detail and incomplete rows (leading Access and SQL to choke). It's county level data set broken into segments, sub-segments, and sub-sub-segments (for a total of ~200 factors) for 40 years. In short, it's huge, and it's not going to fit...
Is there a way to take a screenshot using Java and save it to some sort of image?
Simple as the title states: Can you use only Java commands to take a screenshot and save it? Or, do I need to use an OS specific program to take the screenshot and then grab it off the clipboard?
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“for loop” with two variables? [duplicate]
...other set (Note that if your lists contains other lists, you might want to convert the inner lists to tuples first so that they are hashable; otherwise the call to set will fail.). The list function then turns the set back into a list.
UPDATE 2
OR, the OP might want elements that are identical in...
What is the default access specifier in Java?
I just started reading a Java book and wondered; which access specifier is the default one, if none is specified?
12 Answer...
Are nested try/except blocks in python a good programming practice?
...more complicated situations you may be right, but I think that when you're converting between exception types you often know that the details of the first exception don't matter to the outside user. That is, if __getattr__ raises an exception the bug is probably a typo in the attribute access, not a...