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Importing CSV with line breaks in Excel 2007
...
I can confirm that this works, you can even paste more data in different sheets without repeating the "text to columns" command. This is useful if you need to import several files.
– Alex
Feb ...
How to get default gateway in Mac OSX
...index($6, "en") > 0 ){print $2} }'
192.168.128.1
These examples tested in Mavericks Terminal.app and are specific to OSX only. For example, other *nix versions frequently use 'eth' for ethernet/wireless connections, not 'en'.
This is also only tested with ksh. Other shells may need a slig...
std::shared_ptr thread safety explained
...unt without using lock? An the atomic increment is done by special atomic_test_and_swap/atomic_test_and_increment instructions?
– rahul.deshmukhpatil
Aug 17 '15 at 8:16
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Using bitwise OR 0 to floor a number
...loops on chrome due to loop invariant code motion. A slightly better perf test would be: jsperf.com/floor-performance/2
– Sam Giles
May 8 '13 at 12:04
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git-diff to ignore ^M
...tocrlf is not the best because it silently alters the files without user's confirmation.
– deddebme
May 3 '17 at 18:55
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Create list of single item repeated N times
... references to the same list, not n independent empty lists.
Performance testing
At first glance it seems that repeat is the fastest way to create a list with n identical elements:
>>> timeit.timeit('itertools.repeat(0, 10)', 'import itertools', number = 1000000)
0.37095273281943264
>...
Why do == comparisons with Integer.valueOf(String) give different results for 127 and 128?
...n underlying fact in Java: When using "==" to compare two objects, you are testing if they are references to the same object. When using "equals()", you are testing if they have the same value. You cannot use "equals" to compare primitives.
– Jay
Jan 2 '14 at 1...
Difference between shadowing and overriding in C#?
... reference and object must be of the same type.
class A
{
public void Test()
{
Console.WriteLine("base");
}
}
class B : A
{
public new void Test()
{
Console.WriteLine("sub");
}
public static void Main(string[] args)
{
A a = new A();
...
What is the Scala annotation to ensure a tail recursive function is optimized?
...the compiler.
In Scala 2.7 or earlier, you will need to rely on manual testing, or inspection of the bytecode, to work out whether a method has been optimised.
Example:
you could add a @tailrec annotation so that you can be sure that your changes have worked.
import scala.annotation.t...
How can I get all constants of a type by reflection?
...not sure about the assertions with regards to IsLiteral and IsInitOnly. On testing it would seem that for static readonly properties IsLiteral is always false - so IsLiteral is the only flag you need to check to find constants and you can ignore IsInitOnly. I tried with different field types (e.g. S...