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Good ways to sort a queryset? - Django
...uld expect. Case in point, first is a list of presidents sorted by score (selecting top 5 for easier reading):
>>> auths = Author.objects.order_by('-score')[:5]
>>> for x in auths: print x
...
James Monroe (487)
Ulysses Simpson (474)
Harry Truman (471)
Benjamin Harrison (467)
Ge...
Linux下部署企业级邮件服务器(postfix + dovecot + extmail) - 开源 & Gith...
...er=extmail password=extmail
default_pass_scheme = CRYPT
password_query = SELECT username AS user,password AS password FROM mailbox WHERE username = '%u'
user_query = SELECT maildir, uidnumber AS uid, gidnumber AS gid FROM mailbox WHERE username = '%u'
启动dovecot
service dovecot start
...
WCF timeout exception detailed investigation
...on it (Should be something like GET /service.svc or POST /service.svc) and select Follow TCP Stream.
Wireshark will decode the entire HTTP Conversation, so you can ensure that WCF is actually sending back responses.
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Interface vs Abstract Class (general OO)
...e strategy pattern. A Pilot would have a collection of certifications, and select the correct one at runtime. The certifications would be coded as behaviors that would implement the IFlyPlane interface, with TakeOff, Land, Eject methods.
– Michael Blackburn
Dec...
How to model type-safe enum types?
...urns an Iterator, map, flatMap, filter, etc.
This answer is essentially a selected parts from this article in my blog.
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The differences between .build, .create, and .create! and when should they be used?
...
I'm selected this one as the most correct answer because of the mention on being able to link the associated models with them - that's an interesting and important difference I think over using .new and .save. Which takes a littl...
Get Android .apk file VersionName or VersionCode WITHOUT installing apk
...e of Android Studio then in Android Studio use Build → Analyze APK then select AndroidManifest.xml file.
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How can I rollback a github repository to a specific commit?
...it will go bye-bye). To do this, in SourceTree, I right-clicked on the and selected "Reset BRANCHNAME to this commit".
Then navigate to your repository's local directory and run this command:
git -c diff.mnemonicprefix=false -c core.quotepath=false push -v -f -- tags REPOSITORY_NAME BRANCHNAME:B...
Pointer to class data member “::*”
...unction that would do some pre &post processing before applying a user-selected member function to an object:
void Apply( SomeClass * c, void (SomeClass::*func)() ) {
// do hefty pre-call processing
(c->*func)(); // call user specified function
// do hefty post-call processing
}...
The order of elements in Dictionary
...r elements in key-order then they should to dict.Keys.OrderBy( k => k ).Select( k => dict[k] ) instead (at the cost of O(n) space and O( n log n ) time) for the OrderBy() (which will need to buffer the entire keys collection in an internal list).
– Dai
Oc...