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Fixed point vs Floating point number
...read definitions about them all over Google. But none that I have read provide a simple enough explanation of what they really are. Can I get a plain definition with example?
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How to write a cron that will run a script every day at midnight?
...ng like this:
00 00 * * * ruby path/to/your/script.rb
(00 00 indicates midnight--0 minutes and 0 hours--and the *s mean every day of every month.)
Syntax:
mm hh dd mt wd command
mm minute 0-59
hh hour 0-23
dd day of month 1-31
mt month 1-12
wd day of week 0-7 (Sunday = 0 or 7)
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Weak and strong property setter attributes in Objective-C
...for you.
The only time you would want to use weak, is if you wanted to avoid retain cycles (e.g. the parent retains the child and the child retains the parent so neither is ever released).
The 'toll free bridging' part (casting from NS to CF) is a little tricky. You still have to manually manage ...
What happens if you static_cast invalid value to enum class?
Consider this C++11 code:
1 Answer
1
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I want to get the type of a variable at runtime
...[T: Manifest](t: T): Manifest[T] = manifest[T]
manOf: [T](t: T)(implicit evidence$1: Manifest[T])Manifest[T]
scala> val x = List(1,2,3)
x: List[Int] = List(1, 2, 3)
scala> println(manOf(x))
scala.collection.immutable.List[Int]
If you are in repl mode then
scala> :type List(1,2,3)
List...
Difference between this and self in JavaScript
...rker when window is not accessible (developer.mozilla.org/en-US/docs/Web/Guide/Performance/…). Using self instead of window lets you access the global object in a portable way.
– lqc
Jun 1 '13 at 19:05
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Is unsigned integer subtraction defined behavior?
...as if this design choice meant that programmers don't have to carefully avoid over- and under-flow or have their programs fail spectacularly.
– Theodore Murdock
May 26 '17 at 20:17
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What guarantees are there on the run-time complexity (Big-O) of LINQ methods?
...t's restrict the discussion to the plain IEnumerable LINQ-to-Objects provider. Further, let's assume that any Func passed in as a selector / mutator / etc. is a cheap O(1) operation.
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Why was the arguments.callee.caller property deprecated in JavaScript?
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Early versions of JavaScript did not allow named function expressions, and because of that we could not make a recursive function expression:
// This snippet will work:
function factorial(n) {
return (!(n>1))? 1 : factorial(n-1)*n;
}
[1,2,3,4...
What is the difference between JDK dynamic proxy and CGLib?
...t would stop these libraries from allowing to subclass your class and override your methods.
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