duplicating elements in list

[#1]

What's the easiest way to duplicate elements in a list

myListA = {"y"}; 

//Result I need:
myList = {"y", "y"};

// This should work with an arbitrary number of elements in the list

myListB = {"y1", "y2", "y3"}; 

//Results
myList = {"y1", "y2", "y3","y1", "y2", "y3"};

[#2 · Accepted solution]

Is this what you are looking for?

myListA={"y"};
myList = myListA || myListA;

[#3]

Yes, it was a workaround in my script to deal with this bug.

https://community.jmp.com/t5/Discussions/Python-Send-skips-NaN-values-when-single-column-is-sent/m-p...

[#4 · Accepted solution]

Another way:

Names Default to Here( 1 );

list = { "a", "b", "c" };

Repeat( list, 3 );