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Why doesn't C# support the return of references?
...t c = ref Max(ref a, ref b);
c += 100;
Console.WriteLine(b); // 556!
I know empirically that it is possible to build a version of C# that supports these features because I have done so. Advanced programmers, particularly people porting unmanaged C++ code, often ask us for more C++-like ability to...
git stash apply version
...pretty easy, you can use the N stack number instead of using stash@{n}. So now instead of using:
git stash apply "stash@{n}"
You can type:
git stash apply n
To get list of stashes:
git stash list
In fact stash@{0} is a revision in git that you can switch to... but git stash apply ... should...
Computed / calculated / virtual / derived columns in PostgreSQL
...
The functionality is in development right now: commitfest.postgresql.org/16/1443
– r90t
Jan 23 '18 at 12:42
1
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How to re-sync the Mysql DB if Master and slave have different database incase of Mysql replication?
...master:
mysqldump -u root -p --all-databases > /a/path/mysqldump.sql
Now you can release the lock, even if the dump hasn't ended yet. To do it, perform the following command in the MySQL client:
UNLOCK TABLES;
Now copy the dump file to the slave using scp or your preferred tool.
At the sla...
Disabling browser print options (headers, footers, margins) from page?
...pport setting printer page margin at all, but all the other major browsers now support it.
With the @page directive, you can specify printer margin of the page (which is not the same as normal CSS margin of an HTML element):
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<titl...
Check if property has attribute
...
This can now be done without expression trees and extension methods in a type safe manner with the new C# feature nameof() like this:
Attribute.IsDefined(typeof(YourClass).GetProperty(nameof(YourClass.Id)), typeof(IsIdentity));
nam...
What is the difference between Sublime text and Github's Atom [closed]
... @emrah Yes. Sublime Text is written in C++ and Python. (even google knows that) :P
– pradyunsg
May 16 '15 at 14:33
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Why exactly is eval evil?
I know that Lisp and Scheme programmers usually say that eval should be avoided unless strictly necessary. I’ve seen the same recommendation for several programming languages, but I’ve not yet seen a list of clear arguments against the use of eval . Where can I find an account of the potentia...
What should I do when 'svn cleanup' fails?
... everything to get pulled down).
Run a cleanup on this cancelled checkout.
Now we have a new .svn directory with a clean database (although no/few files)
Copy this .svn into your old, corrupted working directory.
Run svn update and it should bring your new partial .svn directory up to speed with you...
How do I specify local .gem files in my Gemfile?
... Super trick! here is small addition for that. How to verify that gems are now available locally: gem list -r --clear-sources -s file:/repo
– Алексей Лещук
Oct 9 '19 at 14:50
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