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Why is char[] preferred over String for passwords?
...orrect me if I am wrong).
Update
Thanks to the comments I have to update my answer. Apparently there are two cases where this can add a (very) minor security improvement as it reduces the time a password could land on the hard drive. Still I think it's overkill for most use cases.
Your target sy...
What's the difference between identifying and non-identifying relationships?
...reign key column allows NULL or disallows NULL, respectively.
See also my answer to Still Confused About Identifying vs. Non-Identifying Relationships
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Determine the type of an object?
...d and this can sometime lead to unexpected results. Mainly for this reason my favorite way of testing types/classes is to the isinstance built in function.
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Eager load polymorphic
...
My guess is that your models look like this:
class User < ActiveRecord::Base
has_many :reviews
end
class Review < ActiveRecord::Base
belongs_to :user
belongs_to :reviewable, polymorphic: true
end
class Shop <...
Why do we need the “event” keyword while defining events?
...- it's an encapsulation disaster.
For more on events (and delegates) read my article on this topic. (At some point I need to update this for C# 4, which changes field-like events very slightly. The gist of it is still correct though.)
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Use email address as primary key?
... of inserts as they now have only one index to update instead of two.
In my humble opinion, it's not a slam-dunk either way. I tend to prefer to use natural keys when a practical one is available because they're just easier to work with, and the disadvantages tend to not really matter much in most...
Enabling auto layout in iOS 6 while remaining backwards compatible with iOS 5
... "Main Storyboard" setting in Xcode. I add a reference to your answer from my post.
– Imre Kelényi
Sep 26 '12 at 7:06
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C++11 std::threads vs posix threads
...ss-compiling a simple program ( stackoverflow.com/q/30893684 ) It works in my happy gcc/linux environment but when I go to compile for ARMv7 the application terminates instantaneously. pthreads are a pain in the butt compared to std::thread, but this answer nails it on the head with, "If you want to...
Why `null >= 0 && null
...
I had the same problem !!.
Currently my only solution is to separate.
var a = null;
var b = undefined;
if (a===0||a>0){ } //return false !work!
if (b===0||b>0){ } //return false !work!
//but
if (a>=0){ } //return true !
...
How to determine equality for two JavaScript objects?
...are not to be considered part of the object value. For example,
function MyClass(a, b)
{
var c;
this.getCLazy = function() {
if (c === undefined) c = a * b // imagine * is really expensive
return c;
}
}
In this above case, c is not really important to determin...