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Should I use an exception specifier in C++?
... x.x();
}
The copies might throw, the parameter passing might throw, and x() might throw some unknown exception.
Exception-specifications tend to prohibit extensibility.
virtual void open() throw( FileNotFound );
might evolve into
virtual void open() throw( FileNotFound, SocketNotReady, In...
Null or default comparison of generic argument in C#
...is respects IEquatable<T> (without boxing) as well as object.Equals, and handles all the Nullable<T> "lifted" nuances. Hence:
if(EqualityComparer<T>.Default.Equals(obj, default(T))) {
return obj;
}
This will match:
null for classes
null (empty) for Nullable<T>
zero/f...
how to get an uri of an image resource in android
...
The format is:
"android.resource://[package]/[res id]"
[package] is your package name
[res id] is value of the resource ID, e.g. R.drawable.sample_1
to stitch it together, use
Uri path = Uri.parse("android.resource://your.package.name/"...
Using a Single Row configuration table in SQL Server database. Bad idea?
...ping a shopping cart application I've found that I needed to save settings and configurations based on the administrator's preferences and requirements. This information can be anything from company information, Shipping account IDs, PayPal API keys, notification preferences, etc.
...
What is the convention for word separator in Java package names?
...ins a hyphen, or any other special character not allowed in an identifier, convert it into an underscore.
If any of the resulting package name components are keywords then append underscore to them.
If any of the resulting package name components start with a digit, or any other character that i...
Volatile vs Static in Java
...t correct to say that static means one copy of the value for all objects and volatile means one copy of the value for all threads?
...
Decorators with parameters?
...ecorator with arguments should return a function that will take a function and return another function. So it should really return a normal decorator. A bit confusing, right? What I mean is:
def decorator_factory(argument):
def decorator(function):
def wrapper(*args, **kwargs):
...
Javascript: How to detect if browser window is scrolled to bottom?
... if any, versions of IE support window.scrollY.
– Batandwa
Oct 27 '14 at 11:33
3
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psycopg2: insert multiple rows with one query
...e which allows an iterator yielding strings to be read like a file. We can convert each input record to a string using a generator expression. So the solution would be
args = [(1,2), (3,4), (5,6)]
f = IteratorFile(("{}\t{}".format(x[0], x[1]) for x in args))
cursor.copy_from(f, 'table_name', column...
SQL WHERE.. IN clause multiple columns
...
While this would work, it converts the uncorrelated query in the question into a correlated query. Unless the query optimizer is clever, this might give you O(n^2) performance :-(. But maybe I'm underestimating the optimizer...
–...