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What really happens in a try { return x; } finally { x = null; } statement?
...'s a short program to demonstrate:
using System;
class Test
{
static string x;
static void Main()
{
Console.WriteLine(Method());
Console.WriteLine(x);
}
static string Method()
{
try
{
x = "try";
return x;
}
...
How to backup a local Git repository?
...up
# constants:
git_dir_name = '.git' # just to avoid magic "strings"
filename_suffix = ".git.bundle" # will be added to the filename of the created backup
# Test if we are inside a git repo
`git status 2>&1`
if $?.exitstatus != 0
puts 'fatal: Not a git repository: .git...
Detect network connection type on Android
...ived from a @hide method in TelephonyManager.java).
This method returns a String describing the current connection type.
i.e. one of : "WIFI" , "2G" , "3G" , "4G" , "5G" , "-" (not connected) or "?" (unknown)
Remark: This code requires API 25+, but you can easily support older versions by using i...
C++ performance vs. Java/C#
...cing generic code which calls non-generic code (e.g. a generic parser from string to type T, calling standard library API for types T it recognizes, and making the parser easily extensible by its user) is very easy and very efficient, whereas the equivalent in Java or C# is painful at best to write,...
Performance surprise with “as” and nullable types
... JIT
TestUnrestricted<int>(1,5);
TestUnrestricted<string>("abc",5);
TestUnrestricted<int?>(1,5);
TestNullable<int>(1, 5);
const int LOOP = 100000000;
Console.WriteLine(TestUnrestricted<int>(1, LOOP));
Console.Writ...
Difference between len() and .__len__()?
...ther than raising an exception". I tried this: def len(x): return "I am a string." print(len(42)) print(len([1,2,3])) and it printed I am string twice. Can you explain it more?
– Darek Nędza
May 3 '14 at 8:19
...
When to use setAttribute vs .attribute= in JavaScript?
...otice that though XML is explicitly case sensitive, the DOM spec calls for string names to be normalized, so names passed to getNamedItem are effectively case insensitive.
Example Usage:
var div = document.getElementsByTagName('div')[0];
//you can look up specific attributes
var classAttr ...
Convert .pem to .crt and .key
... is used instead.
-engine id
specifying an engine (by its unique id string) will cause rsa to attempt to obtain a functional reference to the specified engine, thus initialising it if needed. The engine will then be set as the default for all available algorithms.
NOTES
The PEM private key ...
Why not use java.util.logging?
...gger.getLogger(LogJUL.class.getSimpleName());
public static void main(String[] args)
{
int N = 1024*1024;
long l = System.currentTimeMillis();
for (int i = 0; i < N; i++)
{
Long lc = System.currentTimeMillis();
Object[] o = { lc...
Search for executable files using find command
...des. Octal modes are octal numbers (e.g., 111), whereas symbolic modes are strings (e.g., a=x).
Symbolic modes identify the security principals as u (user), g (group) and o (other), or a to refer to all three. Permissions are expressed as x for executable, for instance, and assigned to principals us...