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Batch file to copy files from one folder to another folder

... copy against the original. slower, but for the paranoid. /h - copy system and hidden files. /k - copy read-only attributes along with files. otherwise, all files become read-write. /x - if you care about permissions, you might want /o or /x. /y - don't prompt before overwriting existing files. /z -...
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What is the difference between a pseudo-class and a pseudo-element in CSS?

... always consists of a "colon" (:) followed by the name of the pseudo-class and optionally by a value between parentheses. Pseudo-classes are allowed in all sequences of simple selectors contained in a selector. Pseudo-classes are allowed anywhere in sequences of simple selectors, after the lead...
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Tags for Emacs: Relationship between etags, ebrowse, cscope, GNU Global and exuberant ctags

I work on C++ projects, and I went through Alex Ott's guide to CEDET and other threads about tags in StackOverflow, but I am still confused about how Emacs interfaces with these different tag systems to facilitate autocompletion, the looking up of definitions, navigation of source code base or the...
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Difference between HBase and Hadoop/HDFS

This is kind of naive question but I am new to NoSQL paradigm and don't know much about it. So if somebody can help me clearly understand difference between the HBase and Hadoop or if give some pointers which might help me understand the difference. ...
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When do you use map vs flatMap in RxJava?

...em, just throw it with a Non checked exception : RX will call the onError handler for you. Observable.from(jsonFile).map(new Func1<File, String>() { @Override public String call(File file) { try { return new Gson().toJson(new FileReader(file), Object.class); } ...
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client secret in OAuth 2.0

...e google drive api, I have to play with the authentication using OAuth2.0. And I got a few question about this. 3 Answers ...
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Where to put the doxygen comment blocks for an internal library - in H or in CPP files? [closed]

...libraries that are mean to be distributed without its source (only headers and libs with object code). 8 Answers ...
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What is a “thread” (really)?

I have been trying to find a good definition, and get an understanding, of what a thread really is. 10 Answers ...
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Are there any downsides to passing structs by value in C, rather than passing a pointer?

...ot of C programming is for embedded systems, where memory is at a premium, and stack sizes may be measured in KB or even Bytes... If you're passing or returning structs by value, copies of those structs will get placed on the stack, potentially causing the situation that this site is named after... ...
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When monkey patching an instance method, can you call the overridden method from the new implementat

... EDIT: It has been 9 years since I originally wrote this answer, and it deserves some cosmetic surgery to keep it current. You can see the last version before the edit here. You can’t call the overwritten method by name or keyword. That’s one of the many reasons why monkey patching...