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Difference in System. exit(0) , System.exit(-1), System.exit(1 ) in Java
... range:
1-127 are user defined codes (so generated by calling exit(n))
128-255 are codes generated by termination due to different unix signals like SIGSEGV or SIGTERM
But I don't think you should care while coding on Java, it's just a bit of information. It's useful if you plan to make your pro...
numpy matrix vector multiplication [duplicate]
...>> b = np.array([1, 2, 3])
>>> print a.dot(b)
array([16, 6, 8])
This occurs because numpy arrays are not matrices, and the standard operations *, +, -, / work element-wise on arrays. Instead, you could try using numpy.matrix, and * will be treated like matrix multiplication.
Ot...
Method Overloading for null argument
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218
Java will always try to use the most specific applicable version of a method that's available (s...
mongodb count num of distinct values per field/key
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answered Feb 18 '13 at 2:43
StennieStennie
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Any way to force strict mode in node?
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edited Nov 16 '16 at 7:48
answered Jan 7 '13 at 18:14
Cha...
How do I convert a byte array to Base64 in Java?
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Java 8+
Encode or decode byte arrays:
byte[] encoded = Base64.getEncoder().encode("Hello".getBytes());
println(new String(encoded)); // Outputs "SGVsbG8="
byte[] decoded = Base64.getDecoder().decode(encoded);
println(new String...
Best way to find the intersection of multiple sets?
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edited Dec 11 '19 at 13:08
Jean-François Fabre♦
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Optional query string parameters in ASP.NET Web API
... frapontillofrapontillo
9,9511111 gold badges3838 silver badges5353 bronze badges
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str performance in python
...time.
>>> import dis
>>> dis.dis(lambda: str(100000))
8 0 LOAD_GLOBAL 0 (str)
3 LOAD_CONST 1 (100000)
6 CALL_FUNCTION 1
9 RETURN_VALUE
>>> dis.dis(lambda: '%s' % 100000)
...
Restore file from old commit in git
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228
git checkout 'master@{7 days ago}' -- path/to/file.txt
This will not alter HEAD, it will just ...