Hi, I am wondering how to convert a 2d dimensional array to a 1d dimensional array without hardcoding or using inbuilt libraries.

For example {{40,60,90} {20,10} {} {20,60,70,50}} it should return {40,60,60,20,10,20,60,70,50)

I am using data [][]

public in [] convert () {

return new int []

}

}