Tutorial by Topics: atom

Java Atomic Types are simple mutable types that provide basic operations that are thread-safe and atomic without resorting to locking. They are intended for use in cases where locking would be a concurrency bottleneck, or where there is risk of deadlock or livelock.

An atom in Clojure is a variable that can be changed throughout your program (namespace). Because most data types in Clojure are immutable (or unchangeable) - you can't change a number's value without redefining it - atoms are essential in Clojure programming.

After installing go (http://www.riptutorial.com/go/topic/198/getting-started-with-go ) you'll need an environment. An efficient and free way to get you started is using Atom text editor (https://atom.io ) and gulp. A question that maybe crossed your mind is why use gulp?.We need gulp for auto-completion. Let's get Started!

Regular non-capturing groups allow the engine to re-enter the group and attempt to match something different (such as a different alternation, or match fewer characters when a quantifier is used).

Atomic groups differ from regular non-capturing groups in that backtracking is forbidden. Once the group exits, all backtracking information is discarded, so no alternate matches can be attempted.

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