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Convert a list of objects to an array of one of the object's properties
...
For everyone who is stuck with .NET 2.0, like me, try the following way (applicable to the example in the OP):
ConfigItemList.ConvertAll<string>(delegate (ConfigItemType ci)
{
return ci.Name;
}).ToArray();
where ConfigItemList is your list variab...
What's the difference between equal?, eql?, ===, and ==?
...and float), if their numeric value is the same, == will return true.
2 == 2.0 # Output: => true
equal?
Unlike the == operator which tests if both operands are equal, the equal method checks if the two operands refer to the same object. This is the strictest form of equality in Ruby.
Example:...
Pandas - Get first row value of a given column
...row, use iloc:
In [31]: df_test.iloc[0]
Out[31]:
ATime 1.2
X 2.0
Y 15.0
Z 2.0
Btime 1.2
C 12.0
D 25.0
E 12.0
Name: 0, dtype: float64
To select the ith value in the Btime column you could use:
In [30]: df_test['Btime'].iloc[0]
Out[30]: 1.2
...
How to write a switch statement in Ruby
...
In Ruby 2.0, you can also use lambdas in case statements, as follows:
is_even = ->(x) { x % 2 == 0 }
case number
when 0 then puts 'zero'
when is_even then puts 'even'
else puts 'odd'
end
You can also create your own comparator...
Will code in a Finally statement fire if I return a value in a Try block?
...non-CLS compliant exceptions.
Asynchronous ThreadAbortException
As of .NET 2.0, a ThreadAbortException will no longer prevent a finally from running. ThreadAbortException is now hoisted to before or after the finally. The finally will always run and will not be interrupted by a thread abort, so long...
Abstract classes in Swift Language
...going to be to use a Protocol, which is like a Java Interface.
With Swift 2.0, you can then add method implementations and calculated property implementations using protocol extensions. Your only restrictions are that you can't provide member variables or constants and there is no dynamic dispatch....
Is there a way of setting culture for a whole application? All current threads and new threads?
...ere is a private static field on CultureInfo (m_userDefaultCulture in .NET 2.0 mscorlib, s_userDefaultCulture in .NET 4.0 mscorlib) that controls what CurrentCulture returns if a thread has not set that property on itself.
This does not change the native thread locale and it is probably not a good ...
How to log PostgreSQL queries?
...ian and Ubuntu GNU/Linux, this file usually resides at /etc/postgresql/$v/main/postgresql.conf, where $v is the server version. Also, on the aforementioned systems, when log_destination = 'stderr', the output is written to /var/log/postgresql/postgresql-$v-main.log, where $v is the server version (n...
How to allow to accept only image files?
... anything at all, so be sure to test your target platforms well.
For detailed browser support, see http://caniuse.com/#feat=input-file-accept
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Average of 3 long integers
...max 2 values
long mean;
if (min > 0) {
mean = min + ((tmp - min) * (2.0 / 3)); //Average of all 3 values
} else if (median > 0) {
mean = min;
while (mean != tmp) {
mean += 2;
tmp--;
}
} else if (max > 0) {
mean = max;
while (mean != tmp) {
mea...