Question

I have the following dynamically generated strings:

var stringA = ["a1", "a2", "a3" ... 'a400' ... 'a600']; // length 600
var stringB = ["b1", "b2", "b3" ... 'b400']; // length 400

How can I get an Array or string of both combined like this:

var myString = ["a1b1", "a2b2", "a3b3" ... "a400b400", "a401" ... "a600"]

Answer 1

You can do something like this:

var result = [], len = Math.max(stringA.length, stringB.length);
for(var i=0; i < len; i++) {
    result.push((stringA[i] || "") + (stringB[i] || ""));
}

You can test it out here, the || "" is to prevent getting undefined as a string on the for the array that’s shorter. The Math.max() call is to allow either A or B to be longer, it’ll iterate to the end of either, just as A is longer in the question.