identifier Archives - IT Nursery

Programming, sql

IT Nursery

Are PostgreSQL column names case-sensitive?

I have a db table say, persons in Postgres handed down by another team that has a column name say, "first_Name". Now am ...

May 29, 2022
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Java, Programming

IT Nursery

What are “connecting characters” in Java identifiers?

I am reading for SCJP and I have a question regarding this line: Identifiers must start with a letter, a currency character ($), ...

May 29, 2022
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Hibernate throws org.hibernate.AnnotationException: No identifier specified for entity: com..domain.idea.MAE_MFEView

Why am I getting this exception? package com.domain.idea; import javax.persistence.CascadeType; import javax.persistence.Entity; import javax.persistence.FetchType; import javax.persistence.JoinColumn; import javax.persistence.OneToOne; import javax.persistence.Table; import org.hibernate.annotations.AccessType; /** ...

May 22, 2022
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Is main a valid Java identifier?

One of my kids is taking Java in high school and had this on one of his tests: Which of the following is ...

May 18, 2022
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What’s the Hi/Lo algorithm?

What’s the Hi/Lo algorithm? I’ve found this in the NHibernate documentation (it’s one method to generate unique keys, section 5.1.4.2), but I haven’t ...

May 4, 2022
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What is the meaning of single and double underscore before an object name?

Can someone please explain the exact meaning of having single and double leading underscores before an object’s name in Python, and the difference ...

April 7, 2022
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