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round up to 2 decimal places in java? [duplicate]
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@SiB floor(x + 0.5) is different to round(x) for just one value, the value immediately less than 0.5. This is because 0.49999999999999994 + 0.5 is 1.0 when it should be rounded down to 0.0
– Peter Lawrey
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Rails 3 - can't install pg gem
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If you are not sure where your pg_config is, and assuming you are on Linux or Mac, you can run the following command:
which pg_config
Your pg-config can be in different locations depending on how you installed postgres.
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Convert data.frame column to a vector?
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I'm going to attempt to explain this without making any mistakes, but I'm betting this will attract a clarification or two in the comments.
A data frame is a list. When you subset a data frame using the name of a column and [, what you're getting is...
android TextView: setting the background color dynamically doesn't work
Setting the background color programatically of an android TextView doesn't seem to work.
I'm I missing something!
14 Ans...
Flatten list of lists [duplicate]
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Please explain why. This is about as simple as it gets
– Paul Seeb
Jun 29 '12 at 15:43
6
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How to run code when a class is subclassed? [duplicate]
...s__ = Watcher
where Watcher is a subclass of type.
In Python3 the syntax has been changed to
class SuperClass(metaclass=Watcher)
Both are equivalent to
Superclass = Watcher(name, bases, clsdict)
where in this case, name equals the string 'Superclass', and bases is the tuple (object, ). The...
async await return Task
Can somebody explain what does this means into a synchronous method? If I try to change the method to async then VS complain about it.
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Alphabet range in Python
... import string
>>> string.ascii_lowercase
'abcdefghijklmnopqrstuvwxyz'
If you really need a list:
>>> list(string.ascii_lowercase)
['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z']
And to do it wi...
How to reset Android Studio
...der - on Windows 7/8 this would be:
[SYSDRIVE]:\Users\[your username] (ex. C:\Users\JohnDoe\)
In this folder there should be a folder called .AndroidStudioBeta or .AndroidStudio (notice the period at the start - so on some OSes it would be hidden).
Delete this folder (or better yet, move it to ...
Generating file to download with Django
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Using this example downloads a file that is always empty, any ideas?
– camelCase
May 22 '13 at 23:30
3
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