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Pipe output and capture exit status in Bash
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530
There is an internal Bash variable called $PIPESTATUS; it’s an array that holds the exit statu...
How to sum a variable by group
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404
Using aggregate:
aggregate(x$Frequency, by=list(Category=x$Category), FUN=sum)
Category x
1...
How to find largest objects in a SQL Server database?
...ages,
sum(a.data_pages) as DataPages,
(sum(a.total_pages) * 8) / 1024 as TotalSpaceMB,
(sum(a.used_pages) * 8) / 1024 as UsedSpaceMB,
(sum(a.data_pages) * 8) / 1024 as DataSpaceMB
FROM
sys.tables t
INNER JOIN
sys.indexes i ON t.object_id = i.object_id
INNER JOIN
...
Ternary Operator Similar To ?:
...Hi".getClass.getSimpleName |> {x => x.endsWith("$") ? x.init | x}
res0: String = String
scala> List.getClass.getSimpleName |> {x => x.endsWith("$") ? x.init | x}
res1: String = List
Is this adequate for your needs?
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How to create a custom attribute in C#
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|
edited Sep 30 '19 at 20:33
zdwyer
431010 bronze badges
answered Feb 2 '11 at 20:40
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document.getElementById vs jQuery $()
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1035
Not exactly!!
document.getElementById('contents'); //returns a HTML DOM Object
var contents ...
Python, creating objects
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class Student(object):
name = ""
age = 0
major = ""
# The class "constructor" - It's actually an initializer
def __init__(self, name, age, major):
self.name = name
self.age = age
self.major = major
def make_student(name, age,...
git undo all uncommitted or unsaved changes
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1704
This will unstage all files you might have staged with git add:
git reset
This will revert a...
How can I sharpen an image in OpenCV?
...f frame into image: (both cv::Mat)
cv::GaussianBlur(frame, image, cv::Size(0, 0), 3);
cv::addWeighted(frame, 1.5, image, -0.5, 0, image);
The parameters there are something you need to adjust for yourself.
There's also Laplacian sharpening, you should find something on that when you google.
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Rename an environment with virtualenvwrapper
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210
You can use:
cpvirtualenv oldenv newenv
rmvirtualenv oldenv
So in your case:
cpvirtualenv do...