MongoDB - How to update a doubly nested array of objects

 db.COLLECTION.update(

    {

        "any_field": "any_value"

    }

    , {$set: {

        "parent.$[x].child.$[xx].grandchild": "any_value"

    }}

    , {

        arrayFilters: [

            {"x.any_matching_field": "any_value"}

            , {"xx.any_matching_field": "any_value"}

        ]

        , multi: true

        , upsert: false

    }

);

JavaScript - Regex replace with matches

let str = 'abc def SOMETHING_TO_LOOK_FOR 12';

str = str.replace(

    /(.*)SOMETHING_TO_LOOK_FOR ([0-9]{1,})(.*)/

    , "$1 ANY_OTHER_TEXT $2 $3"

);

console.log(str);

JavaScript - Extract the string between first set of curly brackets

let re = /{([^}]+)}/;

let matches = re.exec(str);

console.log(matches[1]);

MongoDB - Filter based on sibling fields (2 fields in the same document)

db.COLLECTION.aggregate([   

    {$match: { 

        $expr: {

            $eq: ["$field1", "$field2.subfield3"]

        }

    }}

]);

JavaScript - Return the string between the first found set of curly brackets

let regExp = /\{([^}]+)\}/;

let matches = regExp.exec('Now show {this}, and not (that).');

console.log(matches[1]);

JavaScript - Return the string between the first found set of parentheses

let regExp = /\(([^)]+)\)/;

let matches = regExp.exec('Show (this) and not (that).');

console.log(matches[1]);

MacOS - How to forcibly remove a file or folder and all its contents recursively

 sudo rm –R /path/to/file/or/folder

Python - Ignore the first copy of both the lowest and the highest value in a list

l = [1,2,3,4,4,5,5,5,6,1,6]

duplicates = list(set([

    x for x in l 

    if 

        l.count(x) > 1 

        and (

            x == max(l) 

            or x == min(l) 

        )

]))

for d in duplicates:

l.remove(d)

print(l)

Python - Ignore the first copy/duplicate of the highest value in a list

l = [1,2,3,4,4,5,5,5,6,1,6]

duplicates = list(set(

    [

        x 

        for x in l 

        if l.count(x) > 1 

            and x == max(l)

    ]

))

for d in duplicates:

l.remove(d)

print(l)

Python - Remove only the first instance of each duplicate value in a list

l = [1,2,3,4,4,5,5,5,6,1]

duplicates = list(set([x for x in l if l.count(x) > 1]))

for d in duplicates:

l.remove(d)

print(l)

Python - Remove duplicates from list

l = [1,1,2,3,1,1,1,4,5,6,1]

l = dict.fromkeys(l).keys()

print(l)

Python - List detect duplicates that occur only "n" or more times

l = [1,2,3,4,4,5,5,6,1,1,1,1]

n = 3

print(list(set([x for x in l if l.count(x) >= n])))

Python - List detect duplicates (distinct)

l = [1,2,3,4,4,5,5,6,1]

print(set([x for x in l if l.count(x) > 1]))

Python - List removal of a given value as many times as it appears

l = [1,2,3,4,5,1,1,1,2]

print(list(filter(lambda x: x!=1, l)))

Python - Remove list duplicate values

l = [1,1,2,3,1,1,1,4,5,6,1]

print(dict.fromkeys(l).keys())

PostgreSQL - Recursive query with hierarchy levels

 CREATE TABLE public.employees (

id int8 NOT NULL,

"name" varchar(50) NULL,

manager_id int8 NULL

);

insert into public.employees(id, name, manager_id) values(1, 'michelle', null);

insert into public.employees(id, name, manager_id) values(2, 'joy', 1);

insert into public.employees(id, name, manager_id) values(3, 'carlos', 2);

insert into public.employees(id, name, manager_id) values(4, 'jane', 3);

insert into public.employees(id, name, manager_id) values(5, 'miguel', 3);

insert into public.employees(id, name, manager_id) values(6, 'josh', 1);

with recursive subordinates as (

-- Anchored element, the person to get all direct

-- and indirect reports to

select 

a.id, a.name, a.manager_id, cast(null as int8) as super_manager_id

, cast(1 as int8) as level

from 

public.employees as a

where 

a.id = 2

-- Recursive elements, all other employees

union -- all 

select 

e.id, e.name, e.manager_id, s.manager_id as super_manager_id

, s.level + 1 as level

from 

public.employees as e 

inner join subordinates as s

on s.id = e.manager_id 

)

select

* 

from 

subordinates

;

PostgreSQL - Qualify alternative (distinct on)

select distinct on (client_id) o.*

from orders as o

order by client_id 

; 

MySQL - Delimited text field to rows using the JSON_TABLE function

select

  `t`.`DELIMITED_FIELD_NAME`

  , `csv_row`.`author`

from

  SOURCE_TABLE as t

  

  -- Delimited field to rows

  join JSON_TABLE(

    TRIM(REPLACE(json_array(`t`.`DELIMITED_FIELD_NAME`), ';', '","')),

    '$[*]'

    columns (

      `DELIMITED_FIELD_NAME`

          varchar(50)

          path '$'

    )

  ) as `csv_row`

;

JavaScript - String HTML markup removal

str = "Miguel de Cervantes Saavedra <br/> more text here";

result = str.replace(/<\/?[^>]+(>|$)/g, "");

JavaScript - String diacritics replacement

function removeDiacritics (str) {

  var defaultDiacriticsRemovalMap = [

    {'base':'A', 'letters':/[\u0041\u24B6\uFF21\u00C0\u00C1\u00C2\u1EA6\u1EA4\u1EAA\u1EA8\u00C3\u0100\u0102\u1EB0\u1EAE\u1EB4\u1EB2\u0226\u01E0\u00C4\u01DE\u1EA2\u00C5\u01FA\u01CD\u0200\u0202\u1EA0\u1EAC\u1EB6\u1E00\u0104\u023A\u2C6F]/g},

    {'base':'AA','letters':/[\uA732]/g},

    {'base':'AE','letters':/[\u00C6\u01FC\u01E2]/g},

    {'base':'AO','letters':/[\uA734]/g},

    {'base':'AU','letters':/[\uA736]/g},

    {'base':'AV','letters':/[\uA738\uA73A]/g},

    {'base':'AY','letters':/[\uA73C]/g},

    {'base':'B', 'letters':/[\u0042\u24B7\uFF22\u1E02\u1E04\u1E06\u0243\u0182\u0181]/g},

    {'base':'C', 'letters':/[\u0043\u24B8\uFF23\u0106\u0108\u010A\u010C\u00C7\u1E08\u0187\u023B\uA73E]/g},

    {'base':'D', 'letters':/[\u0044\u24B9\uFF24\u1E0A\u010E\u1E0C\u1E10\u1E12\u1E0E\u0110\u018B\u018A\u0189\uA779]/g},

    {'base':'DZ','letters':/[\u01F1\u01C4]/g},

    {'base':'Dz','letters':/[\u01F2\u01C5]/g},

    {'base':'E', 'letters':/[\u0045\u24BA\uFF25\u00C8\u00C9\u00CA\u1EC0\u1EBE\u1EC4\u1EC2\u1EBC\u0112\u1E14\u1E16\u0114\u0116\u00CB\u1EBA\u011A\u0204\u0206\u1EB8\u1EC6\u0228\u1E1C\u0118\u1E18\u1E1A\u0190\u018E]/g},

    {'base':'F', 'letters':/[\u0046\u24BB\uFF26\u1E1E\u0191\uA77B]/g},

    {'base':'G', 'letters':/[\u0047\u24BC\uFF27\u01F4\u011C\u1E20\u011E\u0120\u01E6\u0122\u01E4\u0193\uA7A0\uA77D\uA77E]/g},

    {'base':'H', 'letters':/[\u0048\u24BD\uFF28\u0124\u1E22\u1E26\u021E\u1E24\u1E28\u1E2A\u0126\u2C67\u2C75\uA78D]/g},

    {'base':'I', 'letters':/[\u0049\u24BE\uFF29\u00CC\u00CD\u00CE\u0128\u012A\u012C\u0130\u00CF\u1E2E\u1EC8\u01CF\u0208\u020A\u1ECA\u012E\u1E2C\u0197]/g},

    {'base':'J', 'letters':/[\u004A\u24BF\uFF2A\u0134\u0248]/g},

    {'base':'K', 'letters':/[\u004B\u24C0\uFF2B\u1E30\u01E8\u1E32\u0136\u1E34\u0198\u2C69\uA740\uA742\uA744\uA7A2]/g},

    {'base':'L', 'letters':/[\u004C\u24C1\uFF2C\u013F\u0139\u013D\u1E36\u1E38\u013B\u1E3C\u1E3A\u0141\u023D\u2C62\u2C60\uA748\uA746\uA780]/g},

    {'base':'LJ','letters':/[\u01C7]/g},

    {'base':'Lj','letters':/[\u01C8]/g},

    {'base':'M', 'letters':/[\u004D\u24C2\uFF2D\u1E3E\u1E40\u1E42\u2C6E\u019C]/g},

    {'base':'N', 'letters':/[\u004E\u24C3\uFF2E\u01F8\u0143\u00D1\u1E44\u0147\u1E46\u0145\u1E4A\u1E48\u0220\u019D\uA790\uA7A4]/g},

    {'base':'NJ','letters':/[\u01CA]/g},

    {'base':'Nj','letters':/[\u01CB]/g},

    {'base':'O', 'letters':/[\u004F\u24C4\uFF2F\u00D2\u00D3\u00D4\u1ED2\u1ED0\u1ED6\u1ED4\u00D5\u1E4C\u022C\u1E4E\u014C\u1E50\u1E52\u014E\u022E\u0230\u00D6\u022A\u1ECE\u0150\u01D1\u020C\u020E\u01A0\u1EDC\u1EDA\u1EE0\u1EDE\u1EE2\u1ECC\u1ED8\u01EA\u01EC\u00D8\u01FE\u0186\u019F\uA74A\uA74C]/g},

    {'base':'OI','letters':/[\u01A2]/g},

    {'base':'OO','letters':/[\uA74E]/g},

    {'base':'OU','letters':/[\u0222]/g},

    {'base':'P', 'letters':/[\u0050\u24C5\uFF30\u1E54\u1E56\u01A4\u2C63\uA750\uA752\uA754]/g},

    {'base':'Q', 'letters':/[\u0051\u24C6\uFF31\uA756\uA758\u024A]/g},

    {'base':'R', 'letters':/[\u0052\u24C7\uFF32\u0154\u1E58\u0158\u0210\u0212\u1E5A\u1E5C\u0156\u1E5E\u024C\u2C64\uA75A\uA7A6\uA782]/g},

    {'base':'S', 'letters':/[\u0053\u24C8\uFF33\u1E9E\u015A\u1E64\u015C\u1E60\u0160\u1E66\u1E62\u1E68\u0218\u015E\u2C7E\uA7A8\uA784]/g},

    {'base':'T', 'letters':/[\u0054\u24C9\uFF34\u1E6A\u0164\u1E6C\u021A\u0162\u1E70\u1E6E\u0166\u01AC\u01AE\u023E\uA786]/g},

    {'base':'TZ','letters':/[\uA728]/g},

    {'base':'U', 'letters':/[\u0055\u24CA\uFF35\u00D9\u00DA\u00DB\u0168\u1E78\u016A\u1E7A\u016C\u00DC\u01DB\u01D7\u01D5\u01D9\u1EE6\u016E\u0170\u01D3\u0214\u0216\u01AF\u1EEA\u1EE8\u1EEE\u1EEC\u1EF0\u1EE4\u1E72\u0172\u1E76\u1E74\u0244]/g},

    {'base':'V', 'letters':/[\u0056\u24CB\uFF36\u1E7C\u1E7E\u01B2\uA75E\u0245]/g},

    {'base':'VY','letters':/[\uA760]/g},

    {'base':'W', 'letters':/[\u0057\u24CC\uFF37\u1E80\u1E82\u0174\u1E86\u1E84\u1E88\u2C72]/g},

    {'base':'X', 'letters':/[\u0058\u24CD\uFF38\u1E8A\u1E8C]/g},

    {'base':'Y', 'letters':/[\u0059\u24CE\uFF39\u1EF2\u00DD\u0176\u1EF8\u0232\u1E8E\u0178\u1EF6\u1EF4\u01B3\u024E\u1EFE]/g},

    {'base':'Z', 'letters':/[\u005A\u24CF\uFF3A\u0179\u1E90\u017B\u017D\u1E92\u1E94\u01B5\u0224\u2C7F\u2C6B\uA762]/g},

    {'base':'a', 'letters':/[\u0061\u24D0\uFF41\u1E9A\u00E0\u00E1\u00E2\u1EA7\u1EA5\u1EAB\u1EA9\u00E3\u0101\u0103\u1EB1\u1EAF\u1EB5\u1EB3\u0227\u01E1\u00E4\u01DF\u1EA3\u00E5\u01FB\u01CE\u0201\u0203\u1EA1\u1EAD\u1EB7\u1E01\u0105\u2C65\u0250]/g},

    {'base':'aa','letters':/[\uA733]/g},

    {'base':'ae','letters':/[\u00E6\u01FD\u01E3]/g},

    {'base':'ao','letters':/[\uA735]/g},

    {'base':'au','letters':/[\uA737]/g},

    {'base':'av','letters':/[\uA739\uA73B]/g},

    {'base':'ay','letters':/[\uA73D]/g},

    {'base':'b', 'letters':/[\u0062\u24D1\uFF42\u1E03\u1E05\u1E07\u0180\u0183\u0253]/g},

    {'base':'c', 'letters':/[\u0063\u24D2\uFF43\u0107\u0109\u010B\u010D\u00E7\u1E09\u0188\u023C\uA73F\u2184]/g},

    {'base':'d', 'letters':/[\u0064\u24D3\uFF44\u1E0B\u010F\u1E0D\u1E11\u1E13\u1E0F\u0111\u018C\u0256\u0257\uA77A]/g},

    {'base':'dz','letters':/[\u01F3\u01C6]/g},

    {'base':'e', 'letters':/[\u0065\u24D4\uFF45\u00E8\u00E9\u00EA\u1EC1\u1EBF\u1EC5\u1EC3\u1EBD\u0113\u1E15\u1E17\u0115\u0117\u00EB\u1EBB\u011B\u0205\u0207\u1EB9\u1EC7\u0229\u1E1D\u0119\u1E19\u1E1B\u0247\u025B\u01DD]/g},

    {'base':'f', 'letters':/[\u0066\u24D5\uFF46\u1E1F\u0192\uA77C]/g},

    {'base':'g', 'letters':/[\u0067\u24D6\uFF47\u01F5\u011D\u1E21\u011F\u0121\u01E7\u0123\u01E5\u0260\uA7A1\u1D79\uA77F]/g},

    {'base':'h', 'letters':/[\u0068\u24D7\uFF48\u0125\u1E23\u1E27\u021F\u1E25\u1E29\u1E2B\u1E96\u0127\u2C68\u2C76\u0265]/g},

    {'base':'hv','letters':/[\u0195]/g},

    {'base':'i', 'letters':/[\u0069\u24D8\uFF49\u00EC\u00ED\u00EE\u0129\u012B\u012D\u00EF\u1E2F\u1EC9\u01D0\u0209\u020B\u1ECB\u012F\u1E2D\u0268\u0131]/g},

    {'base':'j', 'letters':/[\u006A\u24D9\uFF4A\u0135\u01F0\u0249]/g},

    {'base':'k', 'letters':/[\u006B\u24DA\uFF4B\u1E31\u01E9\u1E33\u0137\u1E35\u0199\u2C6A\uA741\uA743\uA745\uA7A3]/g},

    {'base':'l', 'letters':/[\u006C\u24DB\uFF4C\u0140\u013A\u013E\u1E37\u1E39\u013C\u1E3D\u1E3B\u017F\u0142\u019A\u026B\u2C61\uA749\uA781\uA747]/g},

    {'base':'lj','letters':/[\u01C9]/g},

    {'base':'m', 'letters':/[\u006D\u24DC\uFF4D\u1E3F\u1E41\u1E43\u0271\u026F]/g},

    {'base':'n', 'letters':/[\u006E\u24DD\uFF4E\u01F9\u0144\u00F1\u1E45\u0148\u1E47\u0146\u1E4B\u1E49\u019E\u0272\u0149\uA791\uA7A5]/g},

    {'base':'nj','letters':/[\u01CC]/g},

    {'base':'o', 'letters':/[\u006F\u24DE\uFF4F\u00F2\u00F3\u00F4\u1ED3\u1ED1\u1ED7\u1ED5\u00F5\u1E4D\u022D\u1E4F\u014D\u1E51\u1E53\u014F\u022F\u0231\u00F6\u022B\u1ECF\u0151\u01D2\u020D\u020F\u01A1\u1EDD\u1EDB\u1EE1\u1EDF\u1EE3\u1ECD\u1ED9\u01EB\u01ED\u00F8\u01FF\u0254\uA74B\uA74D\u0275]/g},

    {'base':'oi','letters':/[\u01A3]/g},

    {'base':'ou','letters':/[\u0223]/g},

    {'base':'oo','letters':/[\uA74F]/g},

    {'base':'p','letters':/[\u0070\u24DF\uFF50\u1E55\u1E57\u01A5\u1D7D\uA751\uA753\uA755]/g},

    {'base':'q','letters':/[\u0071\u24E0\uFF51\u024B\uA757\uA759]/g},

    {'base':'r','letters':/[\u0072\u24E1\uFF52\u0155\u1E59\u0159\u0211\u0213\u1E5B\u1E5D\u0157\u1E5F\u024D\u027D\uA75B\uA7A7\uA783]/g},

    {'base':'s','letters':/[\u0073\u24E2\uFF53\u00DF\u015B\u1E65\u015D\u1E61\u0161\u1E67\u1E63\u1E69\u0219\u015F\u023F\uA7A9\uA785\u1E9B]/g},

    {'base':'t','letters':/[\u0074\u24E3\uFF54\u1E6B\u1E97\u0165\u1E6D\u021B\u0163\u1E71\u1E6F\u0167\u01AD\u0288\u2C66\uA787]/g},

    {'base':'tz','letters':/[\uA729]/g},

    {'base':'u','letters':/[\u0075\u24E4\uFF55\u00F9\u00FA\u00FB\u0169\u1E79\u016B\u1E7B\u016D\u00FC\u01DC\u01D8\u01D6\u01DA\u1EE7\u016F\u0171\u01D4\u0215\u0217\u01B0\u1EEB\u1EE9\u1EEF\u1EED\u1EF1\u1EE5\u1E73\u0173\u1E77\u1E75\u0289]/g},

    {'base':'v','letters':/[\u0076\u24E5\uFF56\u1E7D\u1E7F\u028B\uA75F\u028C]/g},

    {'base':'vy','letters':/[\uA761]/g},

    {'base':'w','letters':/[\u0077\u24E6\uFF57\u1E81\u1E83\u0175\u1E87\u1E85\u1E98\u1E89\u2C73]/g},

    {'base':'x','letters':/[\u0078\u24E7\uFF58\u1E8B\u1E8D]/g},

    {'base':'y','letters':/[\u0079\u24E8\uFF59\u1EF3\u00FD\u0177\u1EF9\u0233\u1E8F\u00FF\u1EF7\u1E99\u1EF5\u01B4\u024F\u1EFF]/g},

    {'base':'z','letters':/[\u007A\u24E9\uFF5A\u017A\u1E91\u017C\u017E\u1E93\u1E95\u01B6\u0225\u0240\u2C6C\uA763]/g}

  ];

  for(var i=0; i<defaultDiacriticsRemovalMap.length; i++) {

    str = str.replace(defaultDiacriticsRemovalMap[i].letters, defaultDiacriticsRemovalMap[i].base);

  }

  return str;

}

Credits: http://web.archive.org/web/20120918093154/http://lehelk.com/2011/05/06/script-to-remove-diacritics 

JavaScript - String first n delimited elements

original = "element1_element2_e3_e4_e5";

result = original.split("_").slice(0, 3).join("_");

console.log(result);

MacOS - Get the resolution of all active monitors through the command line

system_profiler SPDisplaysDataType | grep Resolution

MongoDB - Extract year, month and day from a date field

{"$addFields": {

  "year": {
    "$year": {
      "date": "$date_field_name_here",
      "timezone": "America/Detroit"
    }
  },

  "month": {
    "$month": {
      "date": "$date_field_name_here",
      "timezone": "America/Detroit"
    }
  }

  "day": {
    "$dayOfWeek": {
      "date": "$date_field_name_here",
      "timezone": "America/Detroit"
    }
  }
  
}}

MongoDB - Filter string fields by character length

db.collection_name.find({ 
  "$expr": {"$lte": [{"$strLenCP": "$string_field_name"}, 5]} 
});

JavaScript - Aggregate numeric value of an array of objects

// Original array of objects
var objects_array = [
  { id_key: "a", numeric_value: 1 }, 
  { id_key: "b", numeric_value: 2 }, 
  { id_key: "c", numeric_value: 2 }, 
  { id_key: "a", numeric_value: 4 }
];

// Resulting array of objects
var objects_array_aggregated = [];

// Reduction function
objects_array.reduce(function(res, value) {
  if (!res[value.id_key]) {
    res[value.id_key] = { 
        id_key: value.id_key, 
        numeric_value: 0 
      };
    objects_array_aggregated.push(
      res[value.id_key]
    );
  }
  res[value.id_key].numeric_value += value.numeric_value;
  return res;
}, {});

// View the result
console.log(objects_array_aggregated)


Credits:
https://stackoverflow.com/questions/29364262/how-to-group-by-and-sum-array-of-object

Meteor - List all templates using three bracket kind of outputs

On the client console:

Object.keys(Template).filter(function(key){
  return(
    Template[key] &&
    Template[key].renderFunction && 
    Template[key]
        .renderFunction
        .toString()
        .indexOf('Spacebars.makeRaw') > -1
    );
});


Credits: 
Pete Corey http://www.petecorey.com/blog/2015/04/03/black-box-meteor-triple-brace-xss/

Meteor - List all methods

Once a server session is opened through terminal:

Meteor.default_server.method_handlers

Sublime Text - Remove all line content after a given character

Example for removing anything after the semicolon:

Find:
    \:(.{1,})\n

Replace with:
    \n

MongoDB - Get the object with the latest date (from an array of objects)

db.collection_name.aggregate([    
  {$project: {


    "output_field_name": {


      $arrayElemAt: [
        "$array_of_objects",
        {
          "$indexOfArray": [
            "$array_of_objects.date_name",
            { "$max": "$array_of_objects.date_name" }
          ]
        }
      ]


    }


  }}  
]);

MongoDB - IF Statement

"if": {
    "field_name": "value to compare to"
  },
  "then": "value when true",
  "else": "value when false"
}

MongoDB - How to determine if a field is of the date type

"$eq": [{"$type": "$field_name_here"}, "date"]

JavaScript - Get a string made with a few random characters

              base 36      remove "0."  first few chars

Math.random().toString(36).substring(2).substring(0,4);

MongoDB - How to create a "Not and" filter

db.collection_name.find({
  "other_field": "some_value"

  , "$nor": [{ 
    "$and": [
      {"field_filter_1": "value_1"}
      , {"field_filter_2": "value_2"}
    ]
  }]

});

JavaScript - Find a children object by key/value using Underscore.js

let child_object = 
   _.find(
     parent_object
     , function (o) { 
       return o.key_to_search_by === value_searched; 
     }
   );

Meteor - List all installed npm packages

meteor npm list

Meteor - Uninstall npm package

meteor npm uninstall package_name_here

JSON - Convert json into an html table online

http://json2table.com/

MongoDB - Filter for documents dated in the last 30 days

db.collection_name_here.find({
    "date_field_name_here": { 
        $gte: new Date(
            (
                new Date().getTime() 
                - (30 * 24 * 60 * 60 * 1000)
            )
        ) 
    },
});

MongoDB - IF statement using field regex match condition

"field_name_here":
    {"$cond": [
        {$regexMatch: {
            input: "$source_field_name_here",
            regex: /string_to_match_here/i
        }}
        , NumberInt(1) //value if matched
        , NumberInt(0) //value if not matched
    ]},

jQuery - Ajax call example

<!DOCTYPE html>
<html>
<head>
<script
  src="https://code.jquery.com/jquery-1.12.4.min.js"
  integrity="sha256-ZosEbRLbNQzLpnKIkEdrPv7lOy9C27hHQ+Xp8a4MxAQ="
  crossorigin="anonymous"></script>
</head>
<body>

<script>
$.ajax({
url: "https://jsonplaceholder.typicode.com/todos/1",
beforeSend: function(xhr) {
//xhr.setRequestHeader("Authorization", "Basic " + btoa("username:password"));
xhr.setRequestHeader("Content-Type", "application/json")
},
type: "POST",
dataType: "json",
contentType: "application/json",
processData: false,
data: '{"foo":"bar"}',

success: function (response) {
alert(JSON.stringify(response));
},

error: function(){
alert("Error!");
}
});
</script>


</body>
</html>

Meteor - How to install npm packages

meteor npm install --save package_name_here

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

Meteor - Server shell opening

(1) Open Terminal
(2) Navigate to your webapp root folder
(3) type "meteor shell"

Python - Remove text punctuation

import string

table = string.maketrans("","")
text = "this is. a list; with some's punctuation... yes!"
result = text.translate(table, string.punctuation)
print(result)