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What are the most common SQL anti-patterns? [closed]
All of us who work with relational databases have learned (or are learning) that SQL is different. Eliciting the desired results, and doing so efficiently, involves a tedious process partly characterized by learning unfamiliar paradigms, and finding out that some of our most familiar programming p...
Hibernate - A collection with cascade=”all-delete-orphan” was no longer referenced by the owning ent
...ies. The link you referenced distinctly points out creating a new HashSet but you can have this error anytime you reassign the set. For example:
public void setChildren(Set<SonEntity> aSet)
{
this.sonEntities = aSet; //This will override the set that Hibernate is tracking.
}
Usually y...
Set custom HTML5 required field validation message
...nippet
Since this answer got very much attention, here is a nice configurable snippet I came up with:
/**
* @author ComFreek <https://stackoverflow.com/users/603003/comfreek>
* @link https://stackoverflow.com/a/16069817/603003
* @license MIT 2013-2015 ComFreek
* @license[dual license...
What is the HTML tabindex attribute?
What is the tabindex attribute used for in HTML?
10 Answers
10
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How to check if a string contains a substring in Bash
I have a string in Bash:
26 Answers
26
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How to remove items from a list while iterating?
...ant to remove:
somelist = [x for x in somelist if not determine(x)]
Or, by assigning to the slice somelist[:], you can mutate the existing list to contain only the items you want:
somelist[:] = [x for x in somelist if not determine(x)]
This approach could be useful if there are other reference...
Regular expression to return text between parenthesis
...
If your problem is really just this simple, you don't need regex:
s[s.find("(")+1:s.find(")")]
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How to get the Android device's primary e-mail address
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There are several ways to do this, shown below.
As a friendly warning, be careful and up-front to the user when dealing with account, profile, and contact data. If you misuse a user's email address or other personal information, bad things can happen.
Method A: Us...
Using Git, show all commits that are in one branch, but not the other(s)
I have an old branch, which I would like to delete. However, before doing so, I want to check that all commits made to this branch were at some point merged into some other branch. Thus, I'd like to see all commits made to my current branch which have not been applied to any other branch [or, if thi...
What is a C++ delegate?
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You have an incredible number of choices to achieve delegates in C++. Here are the ones that came to my mind.
Option 1 : functors:
A function object may be created by implementing operator()
struct Functor
{
// Normal class/struct mem...