In terms of increasing verboseness in severity in Android Log.
WTF-> Error->Warn-> Info-> Debug->Verbose
WTF (What a Terrible Failure) level is for errors that should never, ever happen. Most developers should never, ever use it.
Data Structure in JavaScript
At a high level, there are basically three types of data structures. Stacks and Queues are array-like structures that differ only in how items are inserted and removed. Linked Lists , Trees , and Graphs are structures with nodes that keep references to other nodes. Hash Tables depend on hash functions to save and locate data. In terms of complexity , Stacks and Queues are the simplest and can be constructed from Linked Lists . Trees and Graphs are the most complex because they extend the concept of a linked list. Hash Tables need to utilize these data structures to perform reliably. In terms of efficiency , Linked Lists are most optimal for recording and storing of data, while Hash Tables are most performant for searching ...