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Java: difference between strong/soft/weak/phantom reference
I have read this article about the topic, but I don't really understand it.
Please give me some advice along with examples when describing the concepts.
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How do you pass arguments to define_method?
...guments. When you define a method you're really just nicknaming the block and keeping a reference to it in the class. The parameters come with the block. So:
define_method(:say_hi) { |other| puts "Hi, " + other }
share
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Which is the fastest algorithm to find prime numbers?
...ly I don't think primegen is the fastest, or even the second-fastest; yafu and primesieve are both faster in general, I think, and certainly over 2^32. Both are (modified) sieves of Eratosthenes rather than the Atkin-Bernstein sieve.
– Charles
Aug 19 '11 at 4:...
How to get first character of string?
I have a string, and I need to get its first character.
16 Answers
16
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How do I grep for all non-ASCII characters?
I have several very large XML files and I'm trying to find the lines that contain non-ASCII characters. I've tried the following:
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Uncatchable ChuckNorrisException
...cp . TestVillain
Gotcha!
The end.
Comment out "extends RuntimeException" and recompile ChuckNorrisException.java only :
javac -cp . ChuckNorrisException.java
Run:
java -cp . TestVillain
Exception in thread "main" java.lang.VerifyError: (class: TestVillain, method: main signature: ([Ljava/lang/...
Node.js app can't run on port 80 even though there's no other process blocking the port
... Then how do you run node on port 80 though? Should you just... not and use a proxy?
– AlexMA
Oct 7 '13 at 12:35
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Detect & Record Audio in Python
...ssing. The problem is that I need to determine when there is audio present and then record it, stop when it goes silent and then pass that file to the processing module.
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How does Facebook Sharer select Images and other metadata when sharing my URL?
...rom the source as a preview for their link. How are these images selected, and how can I ensure that any particular image on my page is always included in this list?
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Why do we need boxing and unboxing in C#?
Why do we need boxing and unboxing in C#?
11 Answers
11
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