only14
Objective: Write program code to create, traverse, and manipulate elements in 1D array or ArrayList objects.
Given a list of ints, return true if every element is a 1 or a 4.
only14([1, 4, 1, 4]) -> true
only14([1, 4, 2, 4]) -> false
only14([1, 1]) ->true
Below is the typical regular for-loop setup as well as the enhanced for-loop setup. How do you get the size of an ArrayList? How is it different from arrays and Strings?
for(int i = 0; i < nums.size(); i++){
//loop generates all the valid indexes starting at 0
}
//Sometimes if you're mostly concerned about reading values
//an enhanced for-loop can be a more elegant solution
for(int el : nums){
//this loop automatically visits every element
//starting at position 0. each iteration, el is set to
//the element at the current position. for example,
//in iteration 0, el will be the element at pos 0.
}
The following are methods of a list that can be used to manipulate the contained data.
Type your solution
Skills Practiced:
3.C
3.D
4.A
4.B
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