Keisuke Daimon – Medium

Keisuke Daimon

Stream<T> and Streams of Primitives; Conversion from/to List and Array (Java 21)

Streams came out as one of Java 8 new features in 2014. Since then, streams have become really common and I would say Java can’t be written…

3 min readMar 11, 2024

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Stream<T> and Streams of Primitives; Conversion from/to List and Array (Java 21)

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Keisuke Daimon

Basic Plots of Pandas and Seaborn for Data Analysis

This story will show some basic methods to draw graphs using pandas and seaborn.

6 min readFeb 24, 2024

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Basic Plots of Pandas and Seaborn for Data Analysis

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Keisuke Daimon

Difference in Network: AWS DB vs Azure DB

I often use AWS. Last year I started using Azure for work and was surprised how we adjust network settings for Azure RDS.

5 min readFeb 9, 2024

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Difference in Network: AWS DB vs Azure DB

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Keisuke Daimon

How to Use `venv` in Python 3.12

This story simply explains how to use venv in Python 3.12 (precisely speaking, Python 3.7 or later).

2 min readFeb 2, 2024

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How to Use `venv` in Python 3.12

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Keisuke Daimon

How to Make Objects on S3 Public Super Quickly

It is kind of confusing to open S3 objects to public because AWS wants to prevent users from doing it accidentally. Here I will explain the…

3 min readJan 27, 2024

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How to Make Objects on S3 Public Super Quickly

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Keisuke Daimon

Step-by-Step Guide: Dynamic Programming for Subset Sum Problem (Part 2)

8 min readJan 20, 2024

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Step-by-Step Guide: Dynamic Programming for Subset Sum Problem (Part 2)

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Keisuke Daimon

Step-by-Step Guide: Dynamic Programming for Subset Sum Problem (Part 1)

When I study competitive programming, I feel dynamic programming is the most difficult part as a beginner.

10 min readJan 13, 2024

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Step-by-Step Guide: Dynamic Programming for Subset Sum Problem (Part 1)

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Keisuke Daimon

AWS Usage an SAA Holder Didn’t Know

When I passed SAA in 2021, I didn’t have much work experience on AWS. In this article, I will share what I’ve learned during my work and my…

4 min readNov 20, 2022

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AWS Usage an SAA Holder Didn’t Know

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Keisuke Daimon

How Can Lambda Functions Access AWS Services? (For SAA/SAP)

Lambda can be set at three locations: outside VPC, inside private subnets and inside public subnets. I explain all patterns.

5 min readAug 20, 2022

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How Can Lambda Functions Access AWS Services? (For SAA/SAP)

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Keisuke Daimon

Introduction to Machine Learning Part 2

Explain basic of machine learning with many examples

8 min readAug 6, 2022

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Introduction to Machine Learning Part 2

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Keisuke Daimon

Keisuke Daimon

Project Manager with technical background (Python, Scrum, Data Analysis, AWS). LinkedIn → https://www.linkedin.com/in/keisuke-daimon-4a279ba8/

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