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What are the differences between a pointer variable and a reference variable in C++?
...ce involved, you might as well use value semantics, which will be cheap or free due to RVO/move construction. But if you have Animal x = fast ? getHare() : getTortoise() then x will face the classic slicing problem, while Animal& x = ... will work correctly.
– Arthur Tacca
...
Create unique constraint with null columns
... involved, but also because it's not a valid UUID. A UUID generator is not free to use any hex digit in any position, for example one position is reserved for the version number of the UUID.
– Toby 1 Kenobi
Sep 3 '19 at 5:35
...
Private vs Protected - Visibility Good-Practice Concern [closed]
... in question has the potential to break an invariant. That way anybody is free to extend your classes as needed.
– GordonM
Aug 8 '17 at 9:03
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No ConcurrentList in .Net 4.0?
...ent reader-writer lock imaginable. Writes should probably use locks (lock-free would be possible, especially if one didn't mind creating a new object instance with every insertion, but the lock should be cheap.
– supercat
Dec 11 '13 at 16:25
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How to get the input from the Tkinter Text Widget?
...venton,
#the root window in Tkinter is usually called "root",
#but you are free to call it by any other name.
root = Tk()
root.title('how to get text from textbox')
#**********************************
mystring = StringVar()
####define the function that the signup button will do
def getvalue():
#...
iOS 7 TableView like in Settings App on iPad
...nit];
CGRect bounds = CGRectInset(cell.bounds, 0, 0);//Cell bounds feel free to adjust insets.
BOOL addSeparator = NO;// Controls if we should add a seperator
// Determine which corners should be rounded
if (indexPath.row == 0 && indexPath.row == [tableView numberOfRowsInSection:i...
What is the difference between LL and LR parsing?
...
Left Most derivation Example:
A grammar G which is context-free has the productions
z → xXY (Rule: 1)
X → Ybx (Rule: 2)
Y → bY (Rule: 3)
Y → c (Rule: 4)
Compute the String w = ‘xcbxbc’ with leftmost derivation.
z ⇒ xXY (Rule:...
How to add a custom right-click menu to a webpage?
...d JAVASCRIPT custom menu.</h2>
<em>Stephan Stanisic | Lisence free</em>
<p>Right-click anywhere on this page to open the custom menu. Styled like the Google Chrome contextmenu. And yes, you can use <i class="fa fa-flag"></i>font-awesome</p>
<p style="f...
What does Docker add to lxc-tools (the userspace LXC tools)?
...ontrol over application dependencies, build tools, packaging etc. They are free to use make, maven, chef, puppet, salt, debian packages, rpms, source tarballs, or any combination of the above, regardless of the configuration of the machines.
Versioning. Docker includes git-like capabilities for trac...
How to test my servlet using JUnit
... of the Writer/OutputStream etc.
There are full details of ObMimic and a free download at the OpenBrace website. Or you can contact me if you have any questions (contact details are on the website).
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