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Difference between natural join and inner join
What is the difference between a natural join and an inner join?
11 Answers
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Select by partial string from a pandas DataFrame
...2 contain string values. I was wondering if there was a way to select rows based on a partial string match against a particular column?
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How can I check if a single character appears in a string?
... first occurrence of the character in
the character sequence represented by this object, or -1 if the
character does not occur.
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Changing every value in a hash in Ruby
I want to change every value in a hash so as to add '%' before and after the value so
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Load RSA public key from file
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Below is the relevant information from the link which Zaki provided.
Generate a 2048-bit RSA private key
$ openssl genrsa -out private_key.pem 2048
Convert private Key to PKCS#8 format (so Java can read it)
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Why does C++11 not support designated initializer lists as C99? [closed]
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C++ has constructors. If it makes sense to initialize just one member then that can be expressed in the program by implementing an appropriate constructor. This is the sort of abstraction C++ promotes.
On the other hand the designated initializers feature is more about exposing and making ...
defaultdict of defaultdict?
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Yes like this:
defaultdict(lambda: defaultdict(int))
The argument of a defaultdict (in this case is lambda: defaultdict(int)) will be called when you try to access a key that doesn't exist. The return value of it will be set as the new value of this key...
How do I fetch lines before/after the grep result in bash?
Hi I'm very new to bash programming. I want a way to search in a given Text. For that I use grep function:
4 Answers
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Sort a text file by line length including spaces
...-n -s | cut -d" " -f2-
Or, to do your original (perhaps unintentional) sub-sorting of any equal-length lines:
cat testfile | awk '{ print length, $0 }' | sort -n | cut -d" " -f2-
In both cases, we have solved your stated problem by moving away from awk for your final cut.
Lines of matching len...
Awaiting multiple Tasks with different results
...wait:
var catTask = FeedCat();
var houseTask = SellHouse();
var carTask = BuyCar();
await Task.WhenAll(catTask, houseTask, carTask);
var cat = await catTask;
var house = await houseTask;
var car = await carTask;
You can also use Task.Result (since you know by this point they have all completed ...