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When is a C++ destructor called?
...ctor (and std::deque, though it's not used quite as much).
As most people know, std::vector will allocate a larger block of memory when/if you add more items than its current allocation can hold. When it does this, however, it has a block of memory that's capable of holding more objects than are cur...
Site does not exist error for a2ensite
... pretty much everything... I will remember to add the .conf extension from now on...
– wtf8_decode
Mar 2 '15 at 17:53
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show 3 more comments...
Create a dictionary on a list with grouping
...ionary(gdc => gdc.Key, gdc => gdc.ToList());
You'd make it shorter if you used shorter variable names too, of course :)
However, might I suggest that a Lookup might be more appropriate? A Lookup is basically a dictionary from a key to an IEnumerable<T> - unless you really need the val...
UICollectionView inside a UITableViewCell — dynamic height?
...IBOutlet to your storyboard.
With the custom table view cell above, I can now subclass it in any other table view cell that needs a collection view and have it implement the UICollectionViewDelegateFlowLayout and UICollectionViewDataSource protocols. Hope this is helpful to someone else!
...
Convert a binary NodeJS Buffer to JavaScript ArrayBuffer
... in [V8] 4.3 Buffers are backed by Uint8Array", so possibly this is faster now...
– ChrisV
Jun 21 '15 at 20:38
See my ...
Calling shell functions with xargs
... any error value that might be produced by the command preceding it. Also, if there's no error, it's the default and thus somewhat redundant.
@phobic mentions that the Bash command could be simplified to
bash -c 'echo_var "{}"'
moving the {} directly inside it. But it's vulnerable to command inj...
Double vs. BigDecimal?
...) could result in the 0.001 being dropped alltogether when summing as the difference in magnitude is so large. With BigDecimal this would not happen.
The disadvantage of BigDecimal is that it's slower, and it's a bit more difficult to program algorithms that way (due to + - * and / not being overlo...
move_uploaded_file gives “failed to open stream: Permission denied” error
...dy /var/www/html/mysite/tmp_file_upload/
Chmod images and tmp_file_upload now to be writable by the owner, if needed [Seems you already have this in place]. Mentioned in @Dmitry Teplyakov answer.
$ sudo chmod -R 0755 /var/www/html/mysite/images/
$ sudo chmod -R 0755 /var/www/html/mysite/tmp_file_...
What are the advantages of NumPy over regular Python lists?
...pointers which double in size) -- a much costlier piece of hardware!
The difference is mostly due to "indirectness" -- a Python list is an array of pointers to Python objects, at least 4 bytes per pointer plus 16 bytes for even the smallest Python object (4 for type pointer, 4 for reference count, ...
How to navigate through textfields (Next / Done Buttons)
... it. Benefits:
Closer to OSX textfield implementation where a textfield knows where the focus should go next
Does not rely on setting or using tags -- which are, IMO fragile for this use case
Can be extended to work with both UITextField and UITextView controls -- or any keyboard entry UI control
...