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Why should the copy constructor accept its parameter by reference in C++?
...cause if it's not by reference, it's by value. To do that you make a copy, and to do that you call the copy constructor. But to do that, we need to make a new value, so we call the copy constructor, and so on...
(You would have infinite recursion because "to make a copy, you need to make a copy".)
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Comparing Dates in Oracle SQL
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Single quote must be there, since date converted to character.
Select employee_id, count(*)
From Employee
Where to_char(employee_date_hired, 'DD-MON-YY') > '31-DEC-95';
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Setting dynamic scope variables in AngularJs - scope.
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The solution I have found is to use $parse.
"Converts Angular expression into a function."
If anyone has a better one please add a new answer to the question!
Here is the example:
var the_string = 'life.meaning';
// Get the model
var model = $parse(the_string);
//...
What's the best way to retry an AJAX request on failure using jQuery?
...{func(param)}. That way, you can directly pass the parameter along without converting it to a string and back, which can fail very easily!
– fabspro
Sep 28 '13 at 15:36
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How to enable/disable bluetooth programmatically in android
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Android BluetoothAdapter docs say it has been available since API Level 5. API Level 5 is Android 2.0.
You can try using a backport of the Bluetooth API (have not tried it personally): http://code.google.com/p/backport-andro...
What does this thread join code mean?
In this code, what does the two joins and break mean? t1.join() causes t2 to stop until t1 terminates?
10 Answers
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Using a ListAdapter to fill a LinearLayout inside a ScrollView layout
I'm facing a very common problem:
I layed out an activity and now it turns out it should display a few items within this ScrollView . The normal way to do that would be to use the existing ListAdapter , connect it to a ListView and BOOM I'd have my list of items.
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Standardize data columns in R
...the output of scale is Nx1 matrix so ideally we should add an as.vector to convert the matrix type back into a vector type. Thanks Julian!
EDIT 2 (2019): Quoting Duccio A.'s comment: For the latest dplyr (version 0.8) you need to change dplyr::funcs with list, like dat %>% mutate_each_(list(~sca...
Replacement for deprecated sizeWithFont: in iOS 7?
...e if you happen to have a weird multi-threading corner case! Here's how I converted NSString sizeWithFont:constrainedToSize::
What used to be:
NSString *text = ...;
CGFloat width = ...;
UIFont *font = ...;
CGSize size = [text sizeWithFont:font
constrainedToSize:(CGSize){width, CGF...
sql primary key and index
...x does no good, but the only harm (very small) is the additional file size and row-creation overhead.
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