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sed in-place flag that works both on Mac (BSD) and Linux
...on of sed todo in-place editing without backups that works both on Linux and Mac? While the BSD sed shipped with OS X seems to need sed -i '' … , the GNU sed Linux distributions usually come with interprets the quotes as empty input file name (instead of the backup extension), and needs se...
Default value of 'boolean' and 'Boolean' in Java
...is no default for Boolean. Boolean must be constructed with a boolean or a String. If the object is unintialized, it would point to null.
The default value of primitive boolean is false.
http://download.oracle.com/javase/6/docs/api/java/lang/Boolean.html
https://docs.oracle.com/javase/tutorial/jav...
When would you use a WeakHashMap or a WeakReference?
...xProvider MUTEX_PROVIDER = new IdMutexProvider();
public void performTask(String resourceId) {
IdMutexProvider.Mutex mutext = MUTEX_PROVIDER.getMutex(resourceId);
synchronized (mutext) {
// look up the resource and do something with it
}
}
IdMutextProvider provides id-based ob...
vector::at vs. vector::operator[]
...y require it. (Microsoft pre-2010 was a bit of a problem here, since std::string didn't always work if the checking options didn't correspond with those of the runtime: -MD, and you'd better turn off checking, -MDd, and you'd better have it on.)
– James Kanze
...
How can I set the default value for an HTML element?
... selected="selected"> 3 </option> The value would be passed as a string when option 3 is selected.
– Sree Rama
Mar 19 '13 at 7:42
...
How to prune local tracking branches that do not exist on remote anymore
...t branch -vv | grep origin) | awk '{print $1}' | xargs git branch -d
This string gets the list of remote branches and passes it into egrep through the standard input. And filters the branches that have a remote tracking branch (using git branch -vv and filtering for those that have origin) then ge...
.Net HttpWebRequest.GetResponse() raises exception when http status code 400 (bad request) is return
...var reader = new StreamReader(data))
{
string text = reader.ReadToEnd();
Console.WriteLine(text);
}
}
}
}
}
You might like to encapsulate the "get me a response even if it's not a success code" bit in a...
Function to clear the console in R and RStudio
...ws,
shell("clear") if on Linux or Mac.
(shell() passes a command (or any string) to the host terminal.)
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\d is less efficient than [0-9]
...rate a list of all such characters using the following code:
var sb = new StringBuilder();
for(UInt16 i = 0; i < UInt16.MaxValue; i++)
{
string str = Convert.ToChar(i).ToString();
if (Regex.IsMatch(str, @"\d"))
sb.Append(str);
}
Console.WriteLine(sb.ToString());
Which generates...
How do I tell Maven to use the latest version of a dependency?
...sion numbers - if you do not conform to a strict pattern Maven compares as strings and not numbers.
– Thorbjørn Ravn Andersen
Feb 25 '13 at 13:19
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