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Key existence check in HashMap
... // Okay, there's a key but the value is null
} else {
// Definitely no such key
}
}
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Java's Interface and Haskell's type class: differences and similarities?
While I am learning Haskell, I noticed its type class , which is supposed to be a great invention that originated from Haskell.
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Is unsigned integer subtraction defined behavior?
...esult would be negative. So that code like this would be incorrect even if it happens to work on most architectures.
4 Answ...
String concatenation: concat() vs “+” operator
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No, not quite.
Firstly, there's a slight difference in semantics. If a is null, then a.concat(b) throws a NullPointerException but a+=b will treat the original value of a as if it were null. Furthermore, the concat() method only accep...
Copying files from one directory to another in Java
... directory to another (subdirectory) using Java. I have a directory, dir, with text files. I iterate over the first 20 files in dir, and want to copy them to another directory in the dir directory, which I have created right before the iteration.
In the code, I want to copy the review (which repre...
Grep not as a regular expression
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Escape the $ by putting a \ in front of it.
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Exclude .svn directories from grep [duplicate]
...irectory, the results include a lot of files from the .svn directories. Is it possible to recursively grep a directory, but exclude all results from .svn directories?
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How do you detect/avoid Memory leaks in your (Unmanaged) code? [closed]
...t practices to detect memory leaks? And coding guidelines to avoid? (As if it's that simple ;)
29 Answers
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How do you stretch an image to fill a while keeping the image's aspect-ratio?
I need to make this image stretch to the maximum size possible without overflowing it's <div> or skewing the image.
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Using DISTINCT and COUNT together in a MySQL Query
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edited Sep 8 '14 at 10:19
user3414693
answered Jun 16 '09 at 15:47
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