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When should I use File.separator and when File.pathSeparator?
...and File.pathSeparator then:
File.pathSeparator is used to separate individual file paths in a list of file paths. Consider on windows, the PATH environment variable. You use a ; to separate the file paths so on Windows File.pathSeparator would be ;.
File.separator is either / or \ that is used t...
What does “%.*s” mean in printf?
...
You can use an asterisk (*) to pass the width specifier/precision to printf(), rather than hard coding it into the format string, i.e.
void f(const char *str, int str_len)
{
printf("%.*s\n", str_len, str);
}
...
Should bower_components be gitignored?
...ered Nov 8 '15 at 7:26
JoshuaDavidJoshuaDavid
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...
What to add for the update portion in ConcurrentDictionary AddOrUpdate
...e you don't distinguish between add and update) this would be:
var sessionId = a.Session.SessionID.ToString();
userDic.AddOrUpdate(
authUser.UserId,
sessionId,
(key, oldValue) => sessionId);
I.e. the Func always returns the sessionId, so that both Add and Update set the same value.
BTW:...
Working with Enums in android
I am almost done with a calculation activity I am working with in android for my app. I try to create a Gender Enum, but for some reason getting Syntax error, insert "EnumBody" to complete EnumDeclaration.
...
Select multiple columns in data.table by their numeric indices
...
It's a bit verbose, but i've gotten used to using the hidden .SD variable.
b<-data.table(a=1,b=2,c=3,d=4)
b[,.SD,.SDcols=c(1:2)]
It's a bit of a hassle, but you don't lose out on other data.table features (I don't think), so you should still be able to use other important ...
What is the difference between setUp() and setUpClass() in Python unittest?
...
Ah, sorry, didn’t spot that. No, unittest doesn’t consider a test to have passed until its tearDown has completed without incident.
– Benjamin Hodgson♦
Dec 20 '17 at 11:16
...
Running multiple TeamCity Agents on the same computer?
...me machine.
After installing one agent you can install additional one, providing the following conditions are met:
the agents are installed in the separate directories
they have distinctive work and temp directories
buildAgent.properties is configured to have different values for name and ownPort ...
Why use 'git rm' to remove a file instead of 'rm'?
...o a checkout of master to get out of detached head state because I knew I didn't have any uncommitted changes. If you haven't committed your changes you may want to do a git stash, but I'm relatively new to git so I don't know the exact command. If you have come here in or after 2014, I hope this an...
What is the purpose of the -nodes argument in openssl?
...ng on your version of OpenSSL and compiled options, you may be able to provide these options in place of -nodes:
-des encrypt private keys with DES
-des3 encrypt private keys with triple DES (default)
-idea encrypt private keys with idea
-seed encrypt private keys w...