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Java: Get first item from a collection
...llection, such as Collection<String> strs , how can I get the first item out? I could just call an Iterator , take its first next() , then throw the Iterator away. Is there a less wasteful way to do it?
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Difference between Bridge pattern and Adapter pattern
...Effectively, the Adapter pattern is useful when you have existing code, be it third party, or in-house, but out of your control, or otherwise not changeable to quite meet the interface you need it to. For instance, we have a SuperWeaponsArray which can control a fine array of doomsday devices.
p...
What is a Y-combinator? [closed]
...dy for a long read, Mike Vanier has a great explanation. Long story short, it allows you to implement recursion in a language that doesn't necessarily support it natively.
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Accept function as parameter in PHP
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It's possible if you are using PHP 5.3.0 or higher.
See Anonymous Functions in the manual.
In your case, you would define exampleMethod like this:
function exampleMethod($anonFunc) {
//execute anonymous function
$a...
What's the difference between a web site and a web application? [closed]
I'm stumped trying to come up to a difference between a website and a web application for myself. As I see it, a web site points to a specific page and a web application is more of some sort of 'portal' to content and information.
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What is the relationship between Looper, Handler and MessageQueue in Android?
...tion/guide for Looper , Handler and MessageQueue . But I couldn't get it. I am new to android, and got very confused with these concepts.
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What is the difference between encrypting and signing in asymmetric encryption?
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When encrypting, you use their public key to write a message and they use their private key to read it.
When signing, you use your private key to write message's signature, and they use your public key to check if it's really yours.
I want to use my private key to genera...
Unit test, NUnit or Visual studio?
I'm using Visual studio (sometimes resharper) to run my unit test.
10 Answers
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What is referential transparency?
What does the term referential transparency mean? I've heard it described as "it means you can replace equals with equals" but this seems like an inadequate explanation.
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How can I auto-elevate my batch file, so that it requests from UAC administrator rights if required?
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You can have the script call itself with psexec's -h option to run elevated.
I'm not sure how you would detect if it's already running as elevated or not... maybe re-try with elevated perms only if there's an Access Denied error?
Or, you could simply h...