Category "indexing"

How to detect array start index by current shells (zsh/bash)?

We all know arrays in Bash are indexed from zero, and in zsh are indexed from one. How can the script know it should use 0 or 1 if I can't ensure the running en

How to detect array start index by current shells (zsh/bash)?

We all know arrays in Bash are indexed from zero, and in zsh are indexed from one. How can the script know it should use 0 or 1 if I can't ensure the running en

SQL Server - Index maintenance for index with uniqueidentifier?

I got some non-clustered indexes (unique) with uniqueidentifier (GUID) as column. The index gets a lot of fragmentation all the time. How should I solve this

Set MultiIndex of an existing DataFrame in pandas

I have a DataFrame that looks like Emp1 Empl2 date Company 0 0 0 2012-05-01 apple 1 0 1 2012-05-29

ERROR Relation already exists in PostgreSQL when creating an index on a table

I have an error when running the the queries below on PostgreSQL from a Java code ..... sql = "CREATE TABLE IF NOT EXISTS table1 (s VARCHAR(100), p VARCHAR(

Split a list into sub-lists based on index ranges

How do I split a list into sub-lists based on index ranges? e.g. original list: list1 = [x,y,z,a,b,c,d,e,f,g] using index ranges 0–4: list1a = [x,y,z,a,b

How does sorting with an index work in MongoDB?

I'm wondering how sorting with an index actually works in MongoDB. There are a couple articles in the MongoDB documentation, but they don't actually describe ho