How to find the Product of Consecutive Fib Numbers in Python
0, 0, 1, 0, 2, 0, 2, 2, 1, 6, 0, 5, 0, 2, 6, 5, 4, 0, 5, 3, 0, 3, …
This is the Van Eck’s Sequence.
Let’s go through it step by step.
Term …
Read Article →Technical Articles
In-depth guides, insights, and best practices for modern software engineering
How to Solve Van Eck's Sequence in Python
0, 0, 1, 0, 2, 0, 2, 2, 1, 6, 0, 5, 0, 2, 6, 5, 4, 0, 5, 3, 0, 3, …
This is the Van Eck’s Sequence.
Let’s go through it step by step.
Term …
Read Article →How to Solve: Help the Bookseller Challenge in Python
A bookseller has lots of books classified in 26 categories labeled A, B, … Z. Each book has a code c of 3, 4, 5 or more characters. The 1st …
Read Article →How to solve AWS MediaPackage PackagingGroup Quota Limit
If you are using AWS Elemental MediaPackage and hit the following error, then you need to either do one of the following:
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Error: error waiting for …
How to Run Cdk Bootstrap
To bootstrap an AWS CDK environment, you simply need to do the following:
npx aws-cdk bootstrap
…for each environment that you would like the …
Read Article →How to Get Account Number from AWS Lambda
If you need to get the current Account Number, or Account ID from within a Lambda execution, then you can access invoked_function_arn from the context …
Building Resilient Distributed Systems
Learn fault tolerance patterns.
Understanding Distributed Systems Failures
Failure Modes and Models
Recognizing what can go wrong:
Common Failure …
Read Article →Summary of the Frequently Used AWS STS API calls
AssumeRole – is useful for allowing existing IAM users to access AWS resources that they don’t already have access to. For example, the user might …
Read Article →Understanding Locking and Conditional Writes in AWS DynamoDB
Optimistic locking is a strategy to ensure that the client-side item that you are updating (or deleting) is the same as the item in DynamoDB. …
Read Article →AWS CodeDeploy Deployment Type Options
CodeDeploy provides two (2) deployment type options:
Option 1 – In-place Deployment
In-place deployment: The application on each instance in the …
Read Article →Defining Amazon ECS Task Placement Strategies
Understanding task placement strategies matters when you’re running ECS on EC2 instances (not Fargate) and want control over how tasks get …
Read Article →Deployment methods in AWS Elastic Beanstalk
– All at once – Deploy the new version to all instances simultaneously. All instances in your environment are out of service for a short time while …
Read Article →How to update NTP to sync clock on Linux
If you need to sync the clock on Linux using the central NTP clock service, you can do the following:
sudo service ntp stop
sudo ntpd -gq
sudo service …Data Partitioning Strategies for Distributed Systems
Master data partitioning techniques including sharding.
Understanding Data Partitioning
Data partitioning (also known as sharding) is the process of …
Read Article →Distributed Consensus Algorithms: Building Fault-Tolerant Systems
Master the algorithms that enable distributed systems to agree on shared state despite failures and network partitions.
The Consensus Problem
Before …
Read Article →How to Find IP Address Ranges used by Amazon S3
You can query the ip-ranges Amazon AWS URL, and parse the results through jq as follows:
Generic S3 IP Ranges
Query:
curl -s …How to Find the nth Reverse Number in Java
The challenge
Reverse Number is a number which is the same when reversed.
For example, the first 20 Reverse Numbers are:
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, …How to Find the Sum of Intervals in Java
The challenge
Write a function called sumIntervals/sum_intervals() that accepts an array of intervals, and returns the sum of all the interval …
How to Find the Stray Number in Python
The challenge
You are given an odd-length array of integers, in which all of them are the same, except for one single number.
Complete the method …
Read Article →How to Find the EDID UUID of External Mac Monitors
You can issue the following command on an Apple Mac’s terminal to show the EDID UUID (unique serial number) of all attached external monitors: …
[Solved] jsii.errors.JSIIError: docker exited with status 1
If you get the following error while running AWS CDK:
raise JSIIError(resp.error) from JavaScriptError(resp.stack)
jsii.errors.JSIIError: docker …How to Filter a Number in C
The challenge
The number has been mixed up with the text. Your goal is to retrieve the number from the text, can you return the number back to its …
Read Article →How to Take a Ten Minute Walk in C
The challenge
You live in the city of Cartesia where all roads are laid out in a perfect grid. You arrived ten minutes too early to an appointment, so …
Read Article →How to Count Stats of a String in C
The challenge
You will be given a string and your task will be to return a list of ints detailing the count of uppercase letters, lowercase, numbers …
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