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Piping buffer to external command in Vim
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132
You can use :w !cmd to write the current buffer to the stdin of an external command. From :hel...
What happens with constraints when a view is removed
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119
The constraints are removed. If you add A again, you will have to make new constraints for it,...
Meaning of numbers in “col-md-4”,“ col-xs-1”, “col-lg-2” in Bootstrap
...s, sm, md, lg) for now, I'll start with just the numbers...
the numbers (1-12) represent a portion of the total width of any div
all divs are divided into 12 columns
so, col-*-6 spans 6 of 12 columns (half the width), col-*-12 spans 12 of 12 columns (the entire width), etc
So, if you want two eq...
Add column with number of days between dates in DataFrame pandas
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df['A'] = pd.to_datetime(df['A'])
df['B'] = pd.to_datetime(df['B'])
In [11]: df.dtypes # if already datetime64 you don't need to use to_datetime
Out[11]:
A datetime64[ns]
B datetime64[ns]
dtype: object
In [12]: df['A'] - df['B']
Out[12]:
one -58 days
two -26 days
dtype: timedelta64[ns...
Adding a regression line on a ggplot
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178
In general, to provide your own formula you should use arguments x and y that will correspond ...
What does passport.session() middleware do?
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142
passport.session() acts as a middleware to alter the req object and change the 'user' value th...
What's the difference between => , ()=>, and Unit=>
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def f(x: => Int) = x * x
If I call it like this
var y = 0
f { y += 1; y }
Then the code will execute like this
{ y += 1; y } * { y += 1; y }
Though that raises the point of what happens if there's a identifier name clash. In traditional call-by-name, a mechanism called capture-avoiding ...
How to sort a Ruby Hash by number value?
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271
No idea how you got your results, since it would not sort by string value... You should reverse ...
Open file dialog and select a file using WPF controls and C#
I have a TextBox named textbox1 and a Button named button1 .
When I click on button1 I want to browse my files to search only for image files (type jpg, png, bmp...).
And when I select an image file and click Ok in the file dialog I want the file directory to be written in the textbox1.tex...
What do pty and tty mean?
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231
"tty" originally meant "teletype" and "pty" means "pseudo-teletype".
In UNIX, /dev/tty* is any ...