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How to delete a row by reference in data.table?
My question is related to assignment by reference versus copying in data.table . I want to know if one can delete rows by reference, similar to
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Search for all occurrences of a string in a mysql database [duplicate]
I'm trying to figure out how to locate all occurrences of a url in a database. I want to search all tables and all fields. But I have no idea where to start or if it's even possible.
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Check if a class has a member function of a given signature
I'm asking for a template trick to detect if a class has a specific member function of a given signature.
16 Answers
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What does “var FOO = FOO || {}” (assign a variable or an empty object to that variable) mean in Java
Looking at an online source code I came across this at the top of several source files.
7 Answers
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Disadvantages of Test Driven Development? [closed]
What do I lose by adopting test driven design?
31 Answers
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How do I right align controls in a StatusStrip?
I am trying to right align a control in a StatusStrip . How can I do that?
9 Answers
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Showing the stack trace from a running Python application
I have this Python application that gets stuck from time to time and I can't find out where.
28 Answers
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how to exclude null values in array_agg like in string_agg using postgres?
If I use array_agg to collect names, I get my names separated by commas, but in case there is a null value, that null is also taken as a name in the aggregate. For example :
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What is stability in sorting algorithms and why is it important?
I'm very curious, why stability is or is not important in sorting algorithms?
10 Answers
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How to select a CRAN mirror in R
I'm trying to install a package through the R prompt by doing the following:
11 Answers
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