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Floating point vs integer calculations on modern hardware
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Alas, I can only give you an "it depends" answer...
From my experience, there are many, many variables to performance...especially between integer & floating point math. It varies strongly from processor to processor (even within the same family such as x86) because diffe...
How good is Java's UUID.randomUUID?
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@osa: Not producing collisions (more than to be expected from perfect randomness) is pretty much the lowest quality requirement for a RNG, while cryptographic strength is the highest. In other words, a cryptographically strong RNG will most definitely not produce more collisions th...
proper way to sudo over ssh
...gt;
root
We're telling sudo not to issue a prompt, and to take its input from stdin. This makes the sudo password passing completely silent so the only response you get back is the output from whoami.
This technique has the benefit of allowing you to run programs through sudo over ssh that thems...
How to define optional methods in Swift protocol?
... types to be Objective-C compatible. This means, only classes that inherit from NSObject can conform to such protocol. No structs, no enums, no associated types.
You must always check if an optional method is implemented by either optionally calling or checking if the conforming type implements it. ...
How do I redirect to the previous action in ASP.NET MVC?
...en is Index but then when the user does POST Edit the referrer is now Edit from the preceding GET request. How can I make sure POST Edit knows the URL that referred the user to GET Edit?
– one.beat.consumer
Nov 15 '12 at 23:53
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Animate visibility modes, GONE and VISIBLE
...to animate when i set the visibility of a linearlayout with other widgets, from GONE to VISIBLE and the opposite.Im using togglebuttons to show and hide. Here's an image to show what i want to do:
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What is the best Java email address validation method? [closed]
...re it was too restrictive on domain, causing it to not accept valid emails from new TLDs.
This bug was resolved on 03/Jan/15 02:48 in commons-validator version 1.4.1
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Sending Email in Android using JavaMail API without using the default/built-in app
...e mail.
Cheers!
P.S. And don't forget that you cannot do network operation from any Activity in android.
Hence it is recommended to use AsyncTask or IntentService to avoid network on main thread exception.
Jar files: https://code.google.com/archive/p/javamail-android/
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Double not (!!) operator in PHP
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Using !! is a habit remaining from programming in C(++). In C doing a cast isn't as easy as in PHP, you can get many different problems, compile warnings, a.s.o. Thus people cast to boll by using !!.
– NikiC
Sep 20 '...
Iterate through every file in one directory
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Dir has also shorter syntax to get an array of all files from directory:
Dir['dir/to/files/*'].each do |fname|
# do something with fname
end
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