Computing
[Javascript] Remove item in Array
In Java and C#, it is common to use List to store collection and it can simply remove item by method remove() . However, there is no list in Javascript so it need to handle […]
Articles by C.H. Ling
Computing
[Java] Remove empty items in List
For Removing empty item in list, it can be be done directly. When using method removeIf(), it will throw UnSupportOperationException . It caused by collection items cannot be removed.
CI / CD
[Jenkins] Warning in pipeline
It is usual when running pipeline, it will expect to continue even execute failure. Previously, need to use try..catch and change currentBuild.currentResult to unstable (Originally it can set as SUCCESS, FAILURE, UNSTABLE). Since Jenkine 2.26, […]
Computing
[WCF] Resolve slow performance when concurrent access
Windows Communication Foundation (WCF) is a SOAP API services from Microsoft. Compare with ASP.net MVC, it can host as single application without rely on IIS and it is better to containerize backend application.
Computing
[Jenkins] Pipeline options in jenkinsfile
Normally, Jenkins pipeline settings can done in UI. However, it cannot be version control if settings changed. Actually, version control can implement in decorative pipeline in jenkinsfile. In this example, it will setup schedule to […]
AWS
[AWS] Create file checksum file when S3 Object uploaded
Checksum ensure the integrity of file. In AWS S3, it also using eTag to do similar things. It create MD5 value and store in eTag. However, it is not a real checksum for s3 object […]
Angular
[Angular] Idle timeout checking
Idle timeout is one of the feature to enhance security by enforce logout if not used. In Angular, idle timeout can be done by rxjs. This demo will show the steps on adding and enable […]
Angular
[Typescript] Cookie handling in Angular
Cookie is one of the persistent storage in web client. It can ensure data persistent even page refresh. Compare with Local storage, it has additional security as it natively support expire date time. As contract, […]
End User Environment 用戶環境
Customize Windows Terminal in Powershell
Terminal is the tools for developer and operator and it streamline many routine process in batch. And we are face it almost everyday. There are several tools which can help to customize it to make […]
Database
[Database] MySQL Tunning
For tuning MySQL, normally it will check index scan, cache and any hardware allocation align with database or not. To measure it, there are several tools to support your judgement.