Enable bluetooth on linux

start bluetooth using below command

sudo systemctl start bluetooth

Generative AI tree view

Treeview with links

https://github.com/jonmiles/bootstrap-treeview

CDN javascript libraries

 

https://cdnjs.com/libraries

Syntax Highlighter Libraries

https://cdnjs.com/libraries/SyntaxHighlighter

Google Prettify Libraries

https://cdnjs.com/libraries/prettify

Adding syntax highlighter in the blogger posts

To add syntax highlighting to the code in the post:

Add following script tag in the head tag of the html of the template

<script src="https://cdn.jsdelivr.net/gh/google/code-prettify@master/loader/run_prettify.js"></script>

Refer the link below for more details:

https://github.com/googlearchive/code-prettify

mongodb update queries

db.post.update({ _id: ObjectId("634940d222dc636741bd70d4") }, {

    $set: {

        "title": "MongoDB Overview",

        "description": "MongoDB is no SQL database",

        "by": "tutorials point",

        "url": "http://www.tutorialspoint.com",

        "tags": ["mongodb", "database", "NoSQL"],

        "likes": 99

    }

})



{
  _id: 4,
  grades: [
     { grade: 80, mean: 75, std: 8 },
     { grade: 85, mean: 90, std: 5 },
     { grade: 85, mean: 85, std: 8 }
  ]
}

Update Documents in an Array

db.students.updateOne(
   { _id: 4, "grades.grade": 85 },
   { $set: { "grades.$.std" : 6 } }
)

Update Embedded Documents Using Multiple Field Matches

db.students.updateOne(
   {
     _id: 5,
     grades: { $elemMatch: { grade: { $lte: 90 }, mean: { $gt: 80 } } }
   },
   { $set: { "grades.$.std" : 6 } }
)

Update with Multiple Array Matches

db.students_deans_list.updateOne(
   { activity_ids: 1, grades: 95, deans_list: 2021 },
   { $set: { "deans_list.$": 2022 } }
)

mongodb find queries

 db.post.find()

//find for string in an array of strings

db.post.find({"tags":"NoSQL"})

//find for string in the nested document. Find where user = "user1" inside comments document

db.post.find({"comments.user":"user1"})

Mongodb Insert Document Query

Insert Documents:

db.post.insert(
[ 
 { 
 title: "MongoDB Overview", 
 description: "MongoDB is no SQL database", 
 by: "tutorials point", 
 url: "http://www.tutorialspoint.com", 
 tags: ["mongodb", "database", "NoSQL"], 
 likes: 100 
 }, 
 {
 title: "NoSQL Database", 
 description: "NoSQL database doesn't have tables", 
 by: "tutorials point", 
 url: "http://www.tutorialspoint.com", 
 tags: ["mongodb", "database", "NoSQL"], 
 likes: 20, 
 comments: 
[ 
 { 
     user:"user1", 
     message: "My first comment", 
     dateCreated: new Date(2013,11,10,2,35),
     like: 0 
 } 
 ] 
} 
])

Javascript spreadsheets

https://js.libhunt.com/handsontable-alternatives https://jspreadsheets.com/

Image background remover online tool

https://www.remove.bg/