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Shallow copy of a Map in Java
...d?).
Josh Bloch on Design - Copy Constructor versus Cloning
If you've read the item about cloning in my book, especially if you read between the lines, you will know that I think clone is deeply broken. [...] It's a shame that Cloneable is broken, but it happens.
Bloch (who by the way, design...
bash: shortest way to get n-th column of output
...awk '{print $2}' | xargs rm
using only bash you can use:
svn st | while read a b; do rm "$b"; done
Granted, it's not shorter, but it's a bit more efficient and it handles whitespace in your filenames correctly.
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Preferred order of writing latitude & longitude tuples in GIS services
...he GeoTools docs on the history and explanation of the problem are worth a read:
http://docs.geotools.org/latest/userguide/library/referencing/order.html
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Setting an environment variable before a command in Bash is not working for the second command in a
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Note that if your command already has two levels of quotes then this method becomes extremely unsatisfactory because of quote hell. In that situation exporting in subshell is much better.
– Pushpendre
Jan 22 '16 at...
Why should I declare a virtual destructor for an abstract class in C++?
...-virtual destructor to avoid v-pointer on each object of the class *.
Yes: Read next question.
Is your base class abstract? (i.e. any virtual pure methods?)
No: Try to make your base class abstract by redesigning your class hierarchy
Yes: Read next question.
Do you want to allow polymorphic del...
Is Task.Result the same as .GetAwaiter.GetResult()?
I was recently reading some code that uses a lot of async methods, but then sometimes needs to execute them synchronously. The code does:
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How to count objects in PowerShell?
As I'm reading in the PowerShell user guide, one of the core PowerShell concepts is that commands accept and return objects instead of text. So for example, running get-alias returns me a number of System.Management.Automation.AliasInfo objects:
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Accessing Google Spreadsheets with C# using Google Data API
I'm having some information in Google Spreadsheets as a single sheet.
Is there any way by which I can read this information from .NET by providing the google credentials and spreadsheet address. Is it possible using Google Data APIs.
Ultimately I need to get the information from Google spreadsheet ...
Get bitcoin historical data [closed]
... ten minutes or else they'll block your IP (plus, it's unnecessary anyway; read more here). The below is a C# approach to getting live data:
using (var WebClient = new System.Net.WebClient())
{
var json = WebClient.DownloadString("https://www.bitstamp.net/api/ticker/");
string value = Co...
Move an array element from one array position to another
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this.splice(to, 0, this.splice(from, 1)[0]);
};
which is awesome to read, but if you want performance (in small data sets) try...
Array.prototype.move2 = function(pos1, pos2) {
// local variables
var i, tmp;
// cast input parameters to integers
pos1 = parseInt(pos1, 10);
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