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loops

Emulating a do-while loop in Bash

by IT Nursery

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

Tags bash, do-while, loops

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

by IT Nursery

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

Tags for-loop, loops, python, while-loop

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

by IT Nursery

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

Tags associative-array, loops, php

How do I count occurrence of unique values inside a list

by IT Nursery

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

Tags arrays, loops, python, unique, variables

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

by IT Nursery

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

Tags arrays, foreach, javascript, loops

Null check in an enhanced for loop

by IT Nursery

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

Tags for-loop, java, loops, syntax

foreach vs someList.ForEach(){}

by IT Nursery

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

Tags .net, c, enumeration, generics, loops

Should try…catch go inside or outside a loop?

by IT Nursery

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

Tags java, loops, performance, try-catch

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

by IT Nursery

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

Tags arraylist, for-loop, java, loops, performance

Speed up the loop operation in R

by IT Nursery

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

Tags loops, performance, r, r-faq, rcpp
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