how do I split an array in different size after a certain condition

Question

Array=[1,2,3,"abc","def","ghi",4,"jkl",5,6,"mno","pq","r","s","tu","v",2,4,55,"wx","yz"]

I want to split that array after everytime the element type changes from string to an integer.

This is the result I expect

[
    [1,2,3,"abc","def","ghi"],
    [4,"jkl"],
    [5,6,"mno","pq","r","s","tu","v"],
    [2,4,55,"wx","yz"]
]

I have tried a lot of ways but keep failing

Possible duplicate of [Splitting a list into uneven groups?](https://stackoverflow.com/questions/38861457/splitting-a-list-into-uneven-groups) — cs95, Jul 13 '17 at 15:37
What is 'a lot of ways'? Show us what didn't work and why it failed. — MarthyM, Jul 13 '17 at 19:03

score 0 · Accepted Answer · answered Jul 13 '17 at 17:59

The following code is written in JavaScript, but can be converted to whatever language you need.

Here is a JSFiddle link to the solution working against your input array: https://jsfiddle.net/dbLaayqr/ (Note: the JSFiddle has a little extra code to output the array in a human readable form)

function split_on_type_change(input_array) {
    var output_array = [];
    var temp_array = [];
    var last_type = '';
    for (i = 0; i < input_array.length; i++) { 
        if (typeof(input_array[i]) == 'number' && last_type == 'string') {
            // append temp_array to output_array
            output_array.push(temp_array);
            // reset temp_array
            temp_array = [];
        }
        // append value to temp_array
        temp_array.push(input_array[i]);
        // keep track of the previous value's type
        last_type = typeof(input_array[i]);
    }
    // append temp_array to output_array
    output_array.push(temp_array);
    return output_array;
}

I did it in Ruby, just make a few changes and it works! Thank you! — Achmad Berniando, Jul 14 '17 at 00:07

how do I split an array in different size after a certain condition

1 Answers1