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Factory Pattern. When to use factory methods?
...got someone that will need a variable number of workers. This person may know some info they need in the people they hire, but that's it.
So, when they need a new employee, they call the hiring agency and tell them what they need. Now, to actually hire someone, you need to know a lot of stuff - b...
Add number of days to a date
...nds since January 1 1970 00:00:00 UTC), relative to the timestamp given in now, or the current time if now is not supplied.
while date
Returns a string formatted according to the given format string using the given integer timestamp or the current time if no timestamp is given.
See the man...
UIRefreshControl on UICollectionView only works if the collection fills the height of the container
...upported. UIRefreshControl can only be used with UITableViewController and now it is strictly enforced.
– Luke Van In
May 8 '14 at 21:27
3
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How can I list ALL DNS records?
...nswer "${3:-any}"
else
dig +nocmd "$1" +noall +answer "${2:-any}"
fi
Now I use dg example.com to get a nice, clean list of DNS records, or dg example.com x to include a bunch of other popular subdomains.
grep -vE "${wild_ips}" filters out records that could be the result of a wildcard DNS ent...
Capturing TAB key in text box [closed]
...use the Tab key within a text box to tab over four spaces. The way it is now, the Tab key jumps my cursor to the next input.
...
How do I automatically update a timestamp in PostgreSQL
...update_modified_column()
RETURNS TRIGGER AS $$
BEGIN
NEW.modified = now();
RETURN NEW;
END;
$$ language 'plpgsql';
Apply the trigger like this:
CREATE TRIGGER update_customer_modtime BEFORE UPDATE ON customer FOR EACH ROW EXECUTE PROCEDURE update_modified_column();
...
Check if two lists are equal [duplicate]
... this does not apply for all cases, List A {a,a} and list B contains {b,a} now ListB.All(listA.contains) and LIstA.All(listB.contains) will give different results, since both have same count, we will get true in one of them even though both are different, it wont work if a list has multiple entries ...
Node.js: Difference between req.query[] and req.params
...ok up a parameter in both places (as well as req.body), but this method is now deprecated.
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Use email address as primary key?
...an't say that a proposed key is not unique based on hypotheticals without knowing the context. e.g. from the phone company's point of view, a telephone number uniquely identifies a customer, by definition. Yes, you can say, "But what if there are two or three people who might answer when you call th...
difference between variables inside and outside of __init__()
...e I could access both kind of variables through the self reference. It was now, when I ran into trouble, that I researched the topic and cleared it up.
The problem with accessing static class variables through the
self reference is that it only references the static class variable if there is no i...