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python code to access s3 bucket from different account - Using Separate Boto3 Sessions/Profiles

This method is typically used to copy objects between buckets without saving them locally.     import boto3 import io # Source Account Credentials (can be loaded from .env file or config) SOURCE_ACCESS_KEY = '...' SOURCE_SECRET_KEY = '...' SOURCE_BUCKET = 'my-source-bucket' # Destination Account Credentials DESTINATION_ACCESS_KEY = '...' DESTINATION_SECRET_KEY = '...' DESTINATION_BUCKET = 'their-destination-bucket' OBJECT_KEY = 'path/to/object.txt' # 1. Create a client for the source account source_client = boto3.client(     's3',     aws_access_key_id=SOURCE_ACCESS_KEY,     aws_secret_access_key=SOURCE_SECRET_KEY ) # 2. Get the object data as a stream (file-like object) source_object = source_client.get_object(Bucket=SOURCE_BUCKET, Key=OBJECT_KEY) object_body = source_object['Body'] # 3. Create a client for the destination account destination_client = boto3.client(     's3',     aws_access_key_id=DESTINATI...
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Iterator and Generator in Js

  Difference between for-in and for-of let object1 = {        let arr = [1,2,3,4]; for (let key in arr) { //key = 0,1,2,3 } for (let key in object1) { //key = 0,1,2,3 } For-in can do both array and object For-of can do object, it does only array What is iterable? enumerable as false makes non iterable getOwnPropertyD Symbol is datatype added in typescript , if we add a  Generator yeild To make an object, we can use the define property method itself to make enumerable as true instead of going for generator/ extending object with symbol.iterator right? What is advantage and when we go for generator/symbol iterator?
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python code to access s3 bucket from different account - Assuming an IAM Role

 import boto3 # 1. Configuration for the destination account's role DESTINATION_ACCOUNT_ID = '123456789012' # Replace with the destination account ID DESTINATION_ROLE_NAME = 'CrossAccountUploadRole' # Replace with the role name ROLE_ARN = f"arn:aws:iam::{DESTINATION_ACCOUNT_ID}:role/{DESTINATION_ROLE_NAME}" BUCKET_NAME = 'their-destination-bucket' # Replace with the destination bucket name FILE_NAME = 'local_file.txt' OBJECT_KEY = 'uploads/file.txt' # The key (path) in the S3 bucket # 2. Assume the role sts_client = boto3.client('sts') assumed_role_object = sts_client.assume_role(     RoleArn=ROLE_ARN,     RoleSessionName="CrossAccountS3UploadSession" ) credentials = assumed_role_object['Credentials'] # 3. Create a new S3 client using the temporary credentials session = boto3.Session(     aws_access_key_id=credentials['AccessKeyId'],     aws_secret_access_key=credentials['SecretAccessKey'], ...
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Javascript - Importance of Typescript

 Typescript was started at Microsoft as internal project, it follows the ECMA standards. The first version released publicly was October 2012 Why typescript? - More business logic code comes with more safety required. i.e., more business logic in the application code, needs to have more safety to make it wont break to have datatypes all fine. - Improves the code quality, has typescript's OOP features helps the code to be clean and more maintainable. - Hidden classes and inline caching - which helps in optimizing - Reduces bugs/defects - less clean code and more functionalities covered.  
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