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Remove rows with duplicate indices (Pandas DataFrame and TimeSeries)
...Pandas Index itself:
df3 = df3[~df3.index.duplicated(keep='first')]
While all the other methods work, the currently accepted answer is by far the least performant for the provided example. Furthermore, while the groupby method is only slightly less performant, I find the duplicated method to be mor...
How do I compare strings in Java?
I've been using the == operator in my program to compare all my strings so far.
However, I ran into a bug, changed one of them into .equals() instead, and it fixed the bug.
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Efficient way to return a std::vector in c++
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vector<string> getseq(char * db_file)
And if you want to print it on main() you should do it in a loop.
int main() {
vector<string> str_vec = getseq(argv[1]);
for(vector<string>::iterator it = str_vec.beg...
How to directly initialize a HashMap (in a literal way)?
...mplify the creation of maps :
// this works for up to 10 elements:
Map<String, String> test1 = Map.of(
"a", "b",
"c", "d"
);
// this works for any number of elements:
import static java.util.Map.entry;
Map<String, String> test2 = Map.ofEntries(
entry("a", "b"),
entr...
Java client certificates over HTTPS/SSL
...);
BufferedReader bufferedreader = new BufferedReader(inputstreamreader);
String string = null;
while ((string = bufferedreader.readLine()) != null) {
System.out.println("Received " + string);
}
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Should one call .close() on HttpServletResponse.getOutputStream()/.getWriter()?
...dy via response.getOutputStream() or response.getWriter() . Should one call .close() on this OutputStream after it has been written to?
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Replacing a char at a given index in string? [duplicate]
String does not have ReplaceAt() , and I'm tumbling a bit on how to make a decent function that does what I need. I suppose the CPU cost is high, but the string sizes are small so it's all ok
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Best way to split string into lines
How do you split multi-line string into lines?
10 Answers
10
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Generating a random & unique 8 character string using MySQL
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This problem consists of two very different sub-problems:
the string must be seemingly random
the string must be unique
While randomness is quite easily achieved, the uniqueness without a retry loop is not. This brings us to concentrate on the uniqueness first. Non-random uniqueness c...
How to remove \xa0 from string in Python?
...n Latin1 (ISO 8859-1), also chr(160). You should replace it with a space.
string = string.replace(u'\xa0', u' ')
When .encode('utf-8'), it will encode the unicode to utf-8, that means every unicode could be represented by 1 to 4 bytes. For this case, \xa0 is represented by 2 bytes \xc2\xa0.
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