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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:...
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...
What 'sensitive information' could be disclosed when setting JsonRequestBehavior to AllowGet
... Not true unfortunately. CSRF attacks could be possible if the method has side effects (e.g. www.example.com/User/DeleteUser/32) as the request will include the cookies neccessary for authentication as they are coming from the victim's machine. [Authorize] will not save you from the attack detailed ...
How to overcome root domain CNAME restrictions?
... the RFC states domain names without subdomain in front of them are not valid. If you read the RFC carefully, however, you'll find that this is not exactly what it says. In fact, RFC 1912 states:
Don't go overboard with CNAMEs. Use them when renaming hosts, but plan to get rid of them (and infor...
Gradle, “sourceCompatibility” vs “targetCompatibility”?
... var channelOptions = {
tags: "".split(" "),
id: "1"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled...
Filtering a list based on a list of booleans
...paring things to True, this is usually not necessary. Instead of if filter[idx]==True: ..., you can simply write if filter[idx]: ....
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