To combine two lists using Python you can use the following snippet.
Sample Python
create a new list
list = list_1 + list_2 #creates a new list
extend a list
list_1.extend(list_2) #extends list 1
concat
How to join two lists in C# and VB.NET
To join two lists in C# and VB.NET you can use one of the following snippet.
Samples C#
//INIT
var listOne = new List<int>() { 1, 2, 3, 4, 5 };
var listTwo = new List<int>() { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
//using Concat, this does not modify listOne. listThree includes all values, even the duplicates.
var listThree = listOne.Concat(listTwo).ToList();
//using Union, this does not modify listOne. listFour includes all values, without duplicates.
var listFour = listOne.Union(listTwo).ToList();
//using AddRange, this modifies listOne. listOne includes all values, even the duplicates.
listOne.AddRange(listTwo);
Samples VB.NET
'INIT
Dim listOne = New List(Of Integer)() From { 1, 2, 3, 4, 5 }
Dim listTwo = New List(Of Integer)() From { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 }
'using Concat, this does not modify listOne. listThree includes all values, even the duplicates.
Dim listThree = listOne.Concat(listTwo).ToList()
'using Union, this does not modify listOne. listFour includes all values, without duplicates.
Dim listFour = listOne.Union(listTwo).ToList()
'using AddRange, this modifies listOne. listOne includes all values, even the duplicates.
listOne.AddRange(listTwo)
How to concat in MySQL
How to join the elements of a array to a string in JavaScript
To join the elements of a array to a string in JavaScript you can use the following snippet.
Sample Javascript
var days = ["Monday", "Tuesday", "Friday"];
var joinedDays = days.join(" and ");
Result
Monday and Tuesday and Friday
for more informations take a look at W3Schools JavaScript Array join() Method