loops Archives - IT Nursery

bash, Programming

IT Nursery

Emulating a do-while loop in Bash

What is the best way to emulate a do-while loop in Bash? I could check for the condition before entering the while loop, ...

June 3, 2022
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Programming, Python

IT Nursery

How can I make sense of the `else` clause of Python loops?

Many Python programmers are probably unaware that the syntax of while loops and for loops includes an optional else: clause: for val in ...

June 3, 2022
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PHP, Programming

IT Nursery

How to loop through an associative array and get the key? [duplicate]

This question already has answers here: PHP foreach loop key value (4 answers) Closed 2 years ago. My associative array: $arr = array( ...

June 2, 2022
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Programming, Python

IT Nursery

How do I count occurrence of unique values inside a list

So I’m trying to make this program that will ask the user for input and store the values in an array / list. ...

June 2, 2022
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javascript, Programming

IT Nursery

JavaScript: Difference between .forEach() and .map()

I know that there were a lot of topics like this. And I know the basics: .forEach() operates on original array and .map() ...

June 2, 2022
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Java, Programming

IT Nursery

Null check in an enhanced for loop

What is the best way to guard against null in a for loop in Java? This seems ugly : if (someList != null) ...

June 1, 2022
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C#, Programming

IT Nursery

foreach vs someList.ForEach(){}

There are apparently many ways to iterate over a collection. Curious if there are any differences, or why you’d use one way over ...

June 1, 2022
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Java, Programming

IT Nursery

Should try…catch go inside or outside a loop?

I have a loop that looks something like this: for (int i = 0; i < max; i++) { String myString = ...; ...

May 31, 2022
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Java, Programming

IT Nursery

How to efficiently remove all null elements from a ArrayList or String Array?

I try with a loop like that // ArrayList tourists for (Tourist t : tourists) { if (t != null) { t.setId(idForm); } ...

May 31, 2022
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performance, Programming

IT Nursery

Speed up the loop operation in R

I have a big performance problem in R. I wrote a function that iterates over a data.frame object. It simply adds a new ...

May 30, 2022
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