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Programming, Python

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How do I find numeric columns in Pandas?

Let’s say df is a pandas DataFrame. I would like to find all columns of numeric type. Something like: isNumeric = is_numeric(df) 12 ...

June 3, 2022
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Programming, typescript

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How to declare a Fixed length Array in TypeScript

At the risk of demonstrating my lack of knowledge surrounding TypeScript types – I have the following question. When you make a type ...

June 3, 2022
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C++, Programming

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C++ auto keyword. Why is it magic?

From all the material I used to learn C++, auto has always been a weird storage duration specifier that didn’t serve any purpose. ...

June 3, 2022
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objective-c, Programming

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In Objective-C, what is the equivalent of Java’s “instanceof” keyword?

I would like to check whether an object (e.g. someObject) is assignable (cast-able) to a variable of another type (e.g. SpecifiedType). In Java, ...

June 3, 2022
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C#, Programming

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C# string reference type?

I know that “string” in C# is a reference type. This is on MSDN. However, this code doesn’t work as it should then: ...

June 3, 2022
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Programming, sql

IT Nursery

How to concatenate columns in a Postgres SELECT?

I have two string columns a and b in a table foo. select a, b from foo returns values a and b. However, ...

June 3, 2022
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postgresql, Programming

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Which data type for latitude and longitude?

I am newbie to PostgreSQL and PostGIS. I want to store latitude and longitude values in PostgreSQL 9.1.1 database table. I will calculate ...

June 2, 2022
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C, Programming

IT Nursery

Where in memory are my variables stored in C?

By considering that the memory is divided into four segments: data, heap, stack, and code, where do global variables, static variables, constant data ...

June 2, 2022
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C++, Programming

IT Nursery

What’s the difference between size_t and int in C++?

In several C++ examples I see a use of the type size_t where I would have used a simple int. What’s the difference, ...

June 2, 2022
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matlab, Programming

IT Nursery

How to get the type of a variable in MATLAB

Does MATLAB have a function/operator that indicates the type of a variable (similar to the typeof operator in JavaScript)? 6 Answers 6

June 2, 2022
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