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How does an underscore in front of a variable in a cocoa objective-c class work?
... must mean that they use it internally for their own frameworks like UIKit etc. Which is why we shouldn't carelessly use it. But I see that, in the link you provided @kelan. They actually say in the "revision history" that it is "suitable" to use (). I interpret is as we "can" use it if we want.
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Condition within JOIN or WHERE
Is there any difference (performance, best-practice, etc...) between putting a condition in the JOIN clause vs. the WHERE clause?
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Obtaining a powerset of a set in Java
...re going to iterate it that's obviously O(2^n).
contains() would be O(n), etc.
Do you really need this?
EDIT:
This code is now available in Guava, exposed through the method Sets.powerSet(set).
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How to fetch FetchType.LAZY associations with JPA and Hibernate in a Spring Controller
...Repository<Person, Long> {
@Query("SELECT p FROM Person p JOIN FETCH p.roles WHERE p.id = (:id)")
public Person findByIdAndFetchRolesEagerly(@Param("id") Long id);
}
This method will use JPQL's fetch join clause to eagerly load the roles association in a single round-trip to the dat...
Data access object (DAO) in Java
...at interface to deal with SQL server, and another to deal with flat files, etc.
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Matplotlib Legends not working
...legend()
The legend will retain line properties like thickness, colours, etc.
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NodeJS - What does “socket hang up” actually mean?
...nd decide how to handle it: whether retry the request, queue it for later, etc.
When you are a server/proxy
When you, as a server, perhaps a proxy server, receive a request from a client, then start acting upon it (or relay the request to the upstream server), and before you have prepared the resp...
Javascript fuzzy search that makes sense
...decent upgrades. However, I could not get it to use bool's (i.e. OR, AND, etc operators) nor could I use the API search interface to filter results.
I discovered nextapps-de/flexsearch: https://github.com/nextapps-de/flexsearch and I believe it by far surpasses a lot of the other javascript search...
Function in JavaScript that can be called only once
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Reusable invalidate function which works with setInterval etc,.: jsbin.com/vicipar/1/edit?js,console
– Q20
Apr 27 '17 at 23:41
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How often should you use git-gc?
...pository is used. With one user checking in once a day and a branch/merge/etc operation once a week you probably don't need to run it more than once a year.
With several dozen developers working on several dozen projects each checking in 2-3 times a day, you might want to run it nightly.
It won't...