Top "Set" questions

Convert Set to List without creating new List

I am using this code to convert a Set to a List: Map<String, List<String>> …

java performance list set

Get difference between two lists

I have two lists in Python, like these: temp1 = ['One', 'Two', 'Three', 'Four'] temp2 = ['One', 'Two'] I need to create …

python performance list set set-difference

How to Iterate over a Set/HashSet without an Iterator?

How can I iterate over a Set/HashSet without the following? Iterator iter = set.iterator(); while (iter.hasNext()) { System.out.…

java loops set hashset

How to convert an Array to a Set in Java

I would like to convert an array to a Set in Java. There are some obvious ways of doing this (…

java collections arrays set

Getting an element from a Set

Why doesn't Set provide an operation to get an element that equals another element? Set<Foo> set = ...; ... Foo …

java collections set equals

Set value of hidden field in a form using jQuery's ".val()" doesn't work

I've been trying to set the value of a hidden field in a form using jQuery, but without success. Here …

jquery set hidden-fields

How to get the first element of the List or Set?

I'd like to know if I can get the first element of a list or set. Which method to use?

java list collections set

What is the difference between Set and List?

What is the fundamental difference between the Set<E> and List<E> interfaces?

java list set

Append values to a set in Python

I have a set like this: keep = set(generic_drugs_mapping[drug] for drug in drug_input) How do I …

python set append

How to retrieve an element from a set without removing it?

Suppose the following: >>> s = set([1, 2, 3]) How do I get a value (any value) out of s without …

python set