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How to write a cron that will run a script every day at midnight?
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Put this sentence in a crontab file:
0 0 * * * /usr/local/bin/python /opt/ByAccount.py > /var/log/cron.log 2>&1
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Remove duplicate values from JS array [duplicate]
...et(a));
}
or
let uniq = a => [...new Set(a)];
Note that, unlike in python, ES6 sets are iterated in insertion order, so this code preserves the order of the original array.
However, if you need an array with unique elements, why not use sets right from the beginning?
Generators
A "lazy", ...
Why should I use the keyword “final” on a method parameter in Java?
...eally does?
EDIT: I should really have summed all of this up with a Monty Python reference; the question seems somewhat similar to asking "What have the Romans ever done for us?"
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How to overload functions in javascript?
...e );
}
return this;
},
Named Arguments
Other languages (like Python) allow one to pass named arguments as a means of passing only some arguments and making the arguments independent of the order they are passed in. Javascript does not directly support the feature of named arguments. ...
What specific productivity gains do Vim/Emacs provide over GUI text editors?
...buffer set the mark at your old location. An example is when I'm editing a Python module and need to add an import statement to the top of the file. The keystroke for going to the top of the buffer (Alt-<) sets the mark. I add the import statement. I press Ctrl-u Ctrl-Space and I'm back where i s...
Singleton: How should it be used
... variable until the first time that variable is needed.
Languages such as Python and Ruby use singletons very little because you can use global variables within a module instead.
So when is it good/bad to use a singleton? Pretty much exactly when it would be good/bad to use a global variable.
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How much faster is C++ than C#?
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It's the same reason why you could use Python instead of C to write some code... but after creating some heavy calculations you can feel the difference in performance.
– Ch3shire
Jan 6 '17 at 22:16
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What is recursion and when should I use it?
...anguage implementations (i.e. every major implementation of C, C++, Basic, Python, Ruby,Java, and C#) iteration is vastly preferable to recursion.
To see why, walk through the steps that the above languages use to call a function:
space is carved out on the stack for the function's arguments and ...
How to filter SQL results in a has-many-through relation
... I like this query the most because resembles a clean style, its like python in sql. I would happily trade 0.44ms (diff with Sean's query) for this kind of code.
– MGP
Jan 30 '13 at 21:56
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E731 do not assign a lambda expression, use a def
... original 2 lines with no increase in readability and no increase in being pythonic. At this point the code checker complains about the function not having docstrings.
In my opinion this rule better be avoided and broken when it makes sense, use your judgement.
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