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Number of lines in a file in Java
I use huge data files, sometimes I only need to know the number of lines in these files, usually I open them up and read them line by line until I reach the end of the file
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Do C# Timers elapse on a separate thread?
...un on whatever thread is hosting the ISynchronizeInvoke instance. I don't know how to make that any more clear. System.Threading.Timer has little (if anything) to do with the original question.
– Brian Gideon
Nov 20 '14 at 19:46
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A monad is just a monoid in the category of endofunctors, what's the problem?
...nsformation, μ : T × T → T, where × means functor composition (μ is known as join in Haskell)
A natural transformation, η : I → T, where I is the identity endofunctor on X (η is known as return in Haskell)
...satisfying these laws:
μ ∘ Tμ = μ ∘ μT
μ ∘ Tη = μ ∘ ηT = 1 (the...
Maven check for updated dependencies in repository
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That's good to know. However, is there a way to have this report when we build a project instead of having to type that command explicitely ?
– Frederic
Aug 2 '18 at 22:07
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What is the fastest way to compare two sets in Java?
...eAll(firstSet);
If the contents of one and two are both empty, then you know that the two sets were equal. If not, then you've got the elements that made the sets unequal.
You mentioned that the number of records might be high. If the underlying implementation is a HashSet then the fetching of ea...
Create a new object from type parameter in generic class
...ng (actually want to learn) but calling it hacky and redundant infers you know of another way that you aren't sharing :)
– perry
Feb 25 at 23:14
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Send email using the GMail SMTP server from a PHP page
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arrrgh. icant get swiftmailer to work. i dont know how to use that "composer" so i just downloaded the swiftmailer zip from github then I enabled open_ssl then supplied my gmail email and password but it still didnt work.
– boi_echos
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How do I detect that an iOS app is running on a jailbroken phone?
...nt, almost all users do have Cydia. It's probably enough to check for that now. However, if you want a 100% reliable check, you'll want to use a kernel-based check as below.
– Grant Paul
Jun 1 '12 at 7:29
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Difference between $(document.body) and $('body')
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Could be resolved now. There was a time when FF and IE would let you do this, and/or would get confused by items with an id of "body" (the error I hit was a customer using our script on a plastic surgeon's site with a picture tagged with the i...
How to define optional methods in Swift protocol?
... implementation which just returns true — it's fine at the first glance. Now, consider the following pseudo code:
final class SomeParser {
func parse(data: Data) -> [Any] {
if /* delegate.validate(value:) is not implemented */ {
/* parse very fast without validating */
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