MongoDB Tutorials
MongoDB is a document-based database management system. The hierarchy is: Database > Collection > Document.
Redis Command: SMEMBERS
Get all the members of a set. We get the full list of all the members. This is the only proper command available to get items/members from a set.
JavaScript: Tagged Template Literals
Using tagged template literals we can parse the template string and then we can perform any operation on the parts of the template literal if required.
Python function: print() [printing in Python]
print function is used to print/output text on the screen or to a file. print() is a built-in function in Python. Generally, we just pass a string as the first parameter, and the string literal is printed. We can use single or double quotes to enclose the string literals, as both are allowed to represent strings in Python.
Redis Command: SADD
Add one or more items/members to a set. Multiple member elements are supported in the command. So we can add one or more members to the same set at the same time. If the key does not exist, then it is created and then members are added to it. If the item/member element already exists in the set, then it is ignored.
Python Programming
Welcome to the Python programming tutorials. We have detailed articles on each and everything you need to know to learn Python.
Redis Command: HINCRBY
Increment the integer value of a hash field. This command increments the field value by a certain amount that is provided. If the hash does not exist, or the field does not exist, then the hash and/or the field will be created. So we will never get any error related to non-existing hash key or field. The field’s max and min allowed value is of a 64-bit signed integer.
Redis Command: HVALS
Get all the values of a hash. Only the values are returned as a list. To get the keys we can use the HKEYS command. We can use the HGETALL command to get all the keys and values.
Redis Command: HKEYS
Get the list of all fields of a hash. All the items returned, are unique as the field names are unique in a hash. If the key does not exist then we get (empty array) in response, which represents an empty array when used in any programming language.
Redis Command: HGETALL
Get all the fields and values of a hash. By only providing the key of the hash we get all the fields and values. We do not need to be aware of specific field(s). The response contains the field and value of the field in 2 separate lines.