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What is the $? (dollar question mark) variable in shell scripting? [duplicate]
...), you will get the return value thrown by the ls command, which should be 0 (default "success" return value). If it doesn't exist, you should get a number other then 0. The exact number depends on the program.
For many programs you can find the numbers and their meaning in the corresponding man pa...
Control the dashed border stroke length and distance between strokes
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answered May 5 '10 at 7:20
snowflakesnowflake
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Difference between len() and .__len__()?
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102
len is a function to get the length of a collection. It works by calling an object's __len__ me...
What kind of Garbage Collection does Go use?
...brid stop-the-world/concurrent collector
stop-the-world part limited by a 10ms deadline
CPU cores dedicated to running the concurrent collector
tri-color mark-and-sweep algorithm
non-generational
non-compacting
fully precise
incurs a small cost if the program is moving pointers around
lower latency,...
How do I initialize the base (super) class?
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150
Python (until version 3) supports "old-style" and new-style classes. New-style classes are deriv...
Git pull after forced update
...anch --hard
– bmaupin
Feb 1 '17 at 20:18
So, to clarify, this is either: Option 1: reset --hard, or Option 2: reset --...
Why use @PostConstruct?
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edited Oct 5 '11 at 13:20
Jasper
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answered Aug ...
Django - how to create a file and save it to a model's FileField?
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edited Apr 3 '18 at 12:20
pawas kr. singh
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answered ...
Using Linq to get the last N elements of a collection?
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collection.Skip(Math.Max(0, collection.Count() - N));
This approach preserves item order without a dependency on any sorting, and has broad compatibility across several LINQ providers.
It is important to take care not to call Skip with a negative ...
Comparing two NumPy arrays for equality, element-wise
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402
(A==B).all()
test if all values of array (A==B) are True.
Note: maybe you also want to test ...