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What is the difference between user variables and system variables?
... defined in autoexec.bat
User variables
Every process has an environment block that contains a set of environment variables and their values. There are two types of environment variables: user environment variables (set for each user) and system environment variables (set for everyone). A child pr...
Can Python print a function definition?
... in x and y
3. computing gradient histograms
4. normalising across blocks
5. flattening into a feature vector
Parameters
----------
image : (M, N) ndarray
Input image (greyscale).
orientations : int
Number of orientation bins.
pixels_per_cell : 2 tuple (int, int)
Size (in pi...
dealloc in Swift
...oc is still present in the case of non-weakly zeroing reference observers. Block based observers via the -[NSNotificationCenter addObserverForName:object:queue:usingBlock] method still need to be un-registered when no longer in use since the system still holds a strong reference to these observers. ...
How may I align text to the left and text to the right in the same line?
...If you don't want to use floating elements and want to make sure that both blocks do not overlap, try:
<p style="text-align: left; width:49%; display: inline-block;">LEFT</p>
<p style="text-align: right; width:50%; display: inline-block;">RIGHT</p>
...
What are the differences between vector and list data types in R?
...
As someone who's just gotten into R, but comes from a C/Java/Ruby/PHP/Python background, here's how I think of it.
A list is really an array + a hashmap. It's a PHP associative array.
> foo = list(bar='baz')
> foo[1]
'baz'
> foo$bar
'baz'
> foo[['bar']]
'baz'
A vector is a f...
How do I vertically center text with CSS? [duplicate]
...lign: center;
border: 2px dashed #f69c55;
}
span {
display: inline-block;
vertical-align: middle;
line-height: normal;
}
<div>
<span>Hello World!</span>
</div>
The CSS just sizes the <div>, vertically center aligns the <span> by setting ...
What does “Memory allocated at compile time” really mean?
...ains information the system requires to know how much memory what function/block will need when it gets executed, along with information on the stack size your application requires. That's what the system will allocate when it executes your bin, and your program becomes a process (well, the executi...
How do I prevent node.js from crashing? try-catch doesn't work
From my experience, a php server would throw an exception to the log or to the server end, but node.js just simply crashes. Surrounding my code with a try-catch doesn't work either since everything is done asynchronously. I would like to know what does everyone else do in their production servers.
...
Getting exact error type in from DbValidationException
...
While you are in debug mode within the catch {...} block open up the "QuickWatch" window (ctrl+alt+q) and paste in there:
((System.Data.Entity.Validation.DbEntityValidationException)ex).EntityValidationErrors
This will allow you to drill down into the ValidationErrors tree...
How to center a checkbox in a table cell?
...
div is a block-element; its default display value is “block”. With span, input continues on left. Test to see difference
– Carlos E
Aug 31 '17 at 19:09
...