MongoDB - Find documents with _ids of the ObjectId type

db.collection_name.find( 

    {"_id": {$type: "objectId"}} 

);

Python - How to determine the default/active version on your profile

(1) Command-line method:

    python --version



(2) Code method:

    import sys
    print(sys.version)

jQuery - How to reset an entire form with a single command

$("#form_id_here").trigger("reset");

MongoDB - Starts with string search

db.collection_name.find({ "field_name" : /^string_here/ });

jQuery - Scroll to first element of a given class or selector

$('html, body').animate(
  {
    scrollTop: $('CSS_SELECTOR').first().offset().top
  }
  , 750
);

MySQL - Split a string where substring is found

select 
   SUBSTRING_INDEX('part 1, part 2', ',', 1) as part_1
   , SUBSTRING_INDEX('part 1, part 2', ',', -1) as part_2
;

MacOS - Folder file count in terminal

find . -not -type d | wc -l