nested Archives - IT Nursery

Programming, Python

IT Nursery

Multiple levels of ‘collection.defaultdict’ in Python

Thanks to some great folks on SO, I discovered the possibilities offered by collections.defaultdict, notably in readability and speed. I have put them ...

June 2, 2022
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HTML, Programming

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How do you overcome the HTML form nesting limitation?

I know that XHTML doesn’t support nested form tags and I have already read other answers here on Stack Overflow regarding this subject, ...

May 30, 2022
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Programming, sql

IT Nursery

Can you create nested WITH clauses for Common Table Expressions?

WITH y AS ( WITH x AS ( SELECT * FROM MyTable ) SELECT * FROM x ) SELECT * FROM y Does ...

May 30, 2022
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Programming, sql

IT Nursery

Best way to do nested case statement logic in SQL Server

I’m writing an SQL Query, where a few of the columns returned need to be calculated depending on quite a lot of conditions. ...

May 29, 2022
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C++, Programming

IT Nursery

Why would one use nested classes in C++?

Can someone please point me towards some nice resources for understanding and using nested classes? I have some material like Programming Principles and ...

May 27, 2022
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Forward declaration of nested types/classes in C++

I recently got stuck in a situation like this: class A { public: typedef struct/class {…} B; … C::D *someField; } class C ...

May 25, 2022
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Can regular expressions be used to match nested patterns? [duplicate]

This question already has answers here: Regular expression to match balanced parentheses (21 answers) Closed 3 years ago. Is it possible to write ...

May 24, 2022
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How to query nested objects?

I have a problem when querying mongoDB with nested objects notation: db.messages.find( { headers : { From: "reservations@marriott.com" } } ).count() 0 db.messages.find( ...

May 20, 2022
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Nested routes with react router v4 / v5

I am currently struggling with nesting routes using react router v4. The closest example was the route config in the React-Router v4 Documentation. ...

May 11, 2022
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