How do I randomly select a string from an array in swift?

Javascript selecting an array?

• I have this is my code. if(inArray(image)){ //image is an integer e.g 1 or 2 or 3. The code is comparing the value of image to an array. Let's say this is the array. example=new Array(1,2,3); And let's also say the value of image is 2. This is the function that checks whether 2 exists within the array. function inArray(obj){ var j=false; for(var hits=0;hits<example.length;hits++){ if(example[hits]==obj){ j=true; break; } } return j; } All the above code works fine and successfully identifies whether number 2 exists within the example array. But let's say I now have 3 arrays like this. example0=new Array(1,2); example1=new Array(3,4); example2=new Array(5,6); All the above code would still work fine if I were to change example.length and example[hits] to either example0 or example1 or example2. But I want to randomly select one of the 3 arrays. So I have used this code to randomise a number between 0-3. var num=Math.floor(Math.random()*3); I now want to alter this part of my code to adapt to the random number. ... for(var hits=0;hits<example.length;hits++){ if(example[hits]==obj){... So i know i need to concatenate the string 'position' with the random number generated in var num. But whenever I try to do this, it doesn't seem to work. Note: I only want to randomise the number ONCE. This is so I always have the same array when playing the game (unless I refresh the game and then the number is randomised once again). It may seem very easy to do, but it's not obvious to me :/ I'm hoping it's literally a simple solution that I can alter. Is it possible for you to either give an example or modify my code to suit my needs? Please..

• Answer:

  Use a two dimensional array and randomly select the first index. http://www.javascriptkit.com/javatutors/twoarray1.shtml