How to UNTAB ( revert tab button)

 presss "SHIFT"+"TAB" to remove TAB indented lines.

How to run long running program in Mac Laptop

 Use caffeinate tool. just enter and dont press Ctr-C

How to create composite key in mongodb

 Please use below as reference to create composite key:

db.coll.createIndex({'k1':1,'k2':1},{unique:true});

{

"createdCollectionAutomatically" : false,

"numIndexesBefore" : 1,

"numIndexesAfter" : 2,

"ok" : 1

}

Python Regex - Find pattern between two blocks

 Examples:

(?<=<h4>).*(?=</h4>)

<h4>Act of attainder</h4>

match inner most multi groups:

(?<=<div class=\"wordbox)(?:(?!</h5></div></div>).)*