MongoDB - Multiple fields/keys distinct list

db.COLLECTION_NAME.aggregate([

// Filter
{"$match":{
FIELD1 : VALUE1
, FIELD2 : VALUE2
}}

// Distinct fields list
, {"$group": {
  "_id": {
  FIELD3_ALIAS : "$field3"
  , FIELD4_ALIAS :"$field4"
  }
}}

// Replace root, so the documents are not nested inside an _id sub-doc
   ,{ $replaceRoot: {
     newRoot: "$_id"
   }}

]);//aggregate

PYTHON - How to completely halt or stop the execution of a script

sys.exit( "Exit message here" )

PYTHON - Determine if ANY of the words in a list are found in a given string

wordsList = [ "two", "long" ]
string = "this is a not very long phrase, two would be too many"

if any( word in string for word in wordsList ):
    print "yes, all given words are found in the given string"
else:

    print "no, not all given words exist in the given string"

PYTHON - Determine if ALL words in a list are found in a given string

wordsList = [ "two", "long" ]
string = "this is a not very long phrase, two would be too many"

if all( word in string for word in wordsList ):
    print "yes, all given words are found in the given string"
else:
    print "no, not all given words exist in the given string"

PYTHON - How to get the parent directory path

print os.pardir

MySQL - How to determine MySQL's version using a query

SHOW VARIABLES LIKE "%version%";

METEOR - On paste event

Template.template-name-here.events({
    'input .class-name-here': function (evt) {}
});

JIRA - Has attachments filter

AND NOT attachments is EMPTY