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Why are ToLookup and GroupBy different?
... I ever bother with GroupBy? Why should it exist?
What happens when you call ToLookup on an object representing a remote database table with a billion rows in it?
The billion rows are sent over the wire, and you build the lookup table locally.
What happens when you call GroupBy on such an object...
Python: Continuing to next iteration in outer loop
...thing:
return
inner()
Use exceptions
Philosophically, this is what exceptions are for, breaking the program flow through the structured programming building blocks (if, for, while) when necessary.
The advantage is that you don't have to break the single piece of code into...
How to enable mod_rewrite for Apache 2.2
I've got fresh install of Apache 2.2 on my Vista machine, everything works fine, except mod rewrite.
15 Answers
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How do I clone into a non-empty directory?
... will set the upstream branch for you, if that is what you want, and it usually is.
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How to See the Contents of Windows library (*.lib)
... binary interface, this still won't get you return values, parameters, or calling convention. That information isn't encoded in the .lib at all; you have to know that ahead of time (via prototypes in header files, for example) in order to call them correctly.
For functions linked with the C++ bina...
Shell command to tar directory excluding certain files/folders
...r.
If you want to archive everything except /usr you can use:
tar -zcvf /all.tgz / --exclude=/usr
In your case perhaps something like
tar -zcvf archive.tgz arc_dir --exclude=dir/ignore_this_dir
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Get list of JSON objects with Spring RestTemplate
...t/", method=RequestMethod.GET)
public @ResponseBody List<Object> findAllObjects() {
List<Object> objects = new ArrayList<Object>();
return objects;
}
ResponseEntity is an extension of HttpEntity that adds a HttpStatus status code. Used in RestTemplate as well @Controller...
JavaScript file upload size validation
...e used for this purpose, and it's easy to test whether it's supported and fall back (if necessary) to another mechanism if it isn't.
Here's a complete example:
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-type" content="text/html;charset=UTF-8">
<title>Show...
Dependency Injection vs Factory Pattern
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When using a factory your code is still actually responsible for creating objects. By DI you outsource that responsibility to another class or a framework, which is separate from your code.
sha...
Why array implements IList?
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Because an array allows fast access by index, and IList/IList<T> is are the only collection interfaces that support this. So perhaps your real question is "Why is there no interface for constant collections with indexers?" And to that I...