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How to flatten tree via LINQ?
...Flatten(node => node.Elements);
If you would prefer flattening in pre-order rather than in post-order, switch around the sides of the Concat(...).
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How to select the last record of a table in SQL?
...he best we can do is something like
Sql Server
SELECT TOP 1 * FROM Table ORDER BY ID DESC
MySql
SELECT * FROM Table ORDER BY ID DESC LIMIT 1
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Combining multiple commits before pushing in Git [duplicate]
...and will open up an editor, where you can just replace pick with squash in order to remove/merge them into one
git rebase -i HEAD~4
where, 4 is the number of commits you want to squash into one. This is explained here as well.
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What is a faster alternative to Python's http.server (or SimpleHTTPServer)?
... for concurrent handling of requests, instead of serialising requests.
Installation
Install node.js if you haven't already. Then use the node package manager (npm) to install the package, using the -g option to install globally. If you're on Windows you'll need a prompt with administrator permissio...
Difference between map and collect in Ruby?
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Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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Is “double hashing” a password less secure than just hashing it once?
... success drop sharply with each additional character. Instead, they use an ordered list of the most likely passwords. They start with "password123" and progress to less frequently used passwords.
Let's say an attackers list is long, with 10 billion candidates; suppose also that a desktop system ca...
Swift to Objective-C header not created in Xcode 6
...classes must deriving from NSObject or been tagged with @objc attribute in order to be exposed to ObjectiveC / Foundation || Cocoa ...
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For-each over an array in JavaScript
...k (not used above). The callback is called for each entry in the array, in order, skipping non-existent entries in sparse arrays. Although I only used one argument above, the callback is called with three: The value of each entry, the index of that entry, and a reference to the array you're iteratin...
What is the difference between compare() and compareTo()?
...re less than, equal, or greater than.
If your class objects have a natural order, implement the Comparable<T> interface and define this method. All Java classes that have a natural ordering implement Comparable<T> - Example: String, wrapper classes, BigInteger
compare(a, b):
Comparator i...
Choosing Java vs Python on Google App Engine
...s mature. However, Java seems to have a longer list of libraries and especially support for Java bytecode regardless of the languages used to write that code. Which language will give better performance and more power? Please advise. Thank you!
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