I want to replace all values with another array values , both arrays are in same size [closed]

Question

eg:

var Array1=array(1,2,3,4,5,6); var Array2=array(7,8,9,10,11,12); 

after replacing Array2 with Array1 values Resulting array should be

var Array1=array(7,8,9,10,11,12); 

Answer 1

Prior ES6 (using push):

Array1.length = 0;                  // Clear contents Array1.push.apply(Array1, Array2);  // Append new contents 

Post ES6 (using splice):

Array1.splice(0, Array1.length, ...Array2);