**For further help with Coding Bat (Java), please check out my books. I am also available for tutoring.**

**makeEnds:**

public int[] makeEnds(int[] nums) { int[] result = { nums[0], nums[nums.length - 1] }; return result; }

**has23:**

public boolean has23(int[] nums) { for (int i = 0; i < nums.length; i++) { if (nums[i] == 2 || nums[i] == 3) return true; } return false; }

**no23:**

public boolean no23(int[] nums) { for (int i = 0; i < nums.length; i++) { if (nums[i] == 2 || nums[i] == 3) return false; } return true; }

This is one of the examples where I wonder why Nick Parlante even bothered with the exercise, since it is analog to the previous one and therefore feels like busywork.

**makeLast:**

public int[] makeLast(int[] nums) { int[] result = new int[2 * nums.length]; result[result.length - 1] = nums[nums.length - 1]; return result; }

**double23:**

public boolean double23(int[] nums) { int twoCount = 0; int threeCount = 0; for (int i = 0; i < nums.length; i++) { if (nums[i] == 2) twoCount++; if (nums[i] == 3) threeCount++; } return twoCount == 2 || threeCount == 2; }

**fix23:**

public int[] fix23(int[] nums) { for (int i = 0; i < nums.length - 1; i++) { if (nums[i] == 2 && nums[i + 1] == 3) nums[i + 1] = 0; } return nums; }

**start1:**

public int start1(int[] a, int[] b) { int count = 0; if (a.length > 0 && a[0] == 1) count++; if (b.length > 0 && b[0] == 1) count++; return count; }

**biggerTwo:**

public int[] biggerTwo(int[] a, int[] b) { if (a[0] + a[1] < b[0] + b[1]) return b; return a; }

**makeMiddle:**

public int[] makeMiddle(int[] nums) { int[] result = { nums[nums.length / 2 - 1], nums[nums.length / 2] }; return result; }

**plusTwo:**

public int[] plusTwo(int[] a, int[] b) { int[] result = { a[0], a[1], b[0], b[1] }; return result; }

**For further help with Coding Bat (Java), please check out my books. I am also available for tutoring.**

Armikaabout has23 and no23.

I think Nick Parlante didnt want to use a loop. These exercises are for the practice with || and &&.

public boolean has23(int[] nums) {

return (nums[0]==2 || nums[0]==3 || nums[1]==2 || nums[1]==3);

}

public boolean no23(int[] nums) {

return (nums[0]!=2 && nums[0]!=3 && nums[1]!=2 && nums[1]!=3);

}

Benmany of these were helpful thanks

WOJTEKdouble23

return (nums.length==2&&(nums[0]==2&&nums[1]==2||nums[0]==3&&nums[1]==3));

remember – NO LOOPS

taha hashmipublic boolean double23(int[] nums) {

return (nums.length>1 && nums[0]==nums[1] && (nums[0]==2 || nums[0]==3));

}

works too