If you want to find an element inside of a list in MongoDB document you can use the simple find command. Let's say you have the below documents:

[{
     "food": "Ghorme",
     "creation_date": "2017-10-12 12:00:00"
     "rates": ["bad", "so_so", "not_bad", "mmmm"]
 },{
     "food": "Kebab",
     "creation_date": "2017-10-07 22:10:00"
     "rates": ["great", "not_bad", "great", "great"]
 }]

Now if you want to find a document that has the value of bad in rates, you just use the below find query:

db.foods.find({rates: "bad" }).pretty()

#mongodb #mongo #find #list #array

Array and loop in bash script

To define an array you can use a structure like below, be careful that we don't use comma in between:

dbs=( 'test1' 'test2' 'test3' )

Now to loop over the array elements use for:

for your_db in ${dbs[@]}
 do
     echo $your_db
 done

This is it!

#bash #scripting #for #loop #array