JAVA BAT : Array 1 : SameFirstLast

In Array 1 section, these are simple Array based problems in which there is no use of loops to solve the problems.

Same First Last Problem :Given an array of ints, return true if the array is length 1 or more, and the first element and the last element are the same.

sameFirstLast({1, 2, 3}) → false
sameFirstLast({1, 2, 3, 1}) → true
sameFirstLast({1, 2, 1}) → true

To solve this problem first we check weather the array given is of length greater then zero or not. To check this we use the method Array.length (For strings the method is String.length() ). Then we will check for the first and last element, are they same.

So the code for this problem: 

public boolean sameFirstLast ( int[] nums ) {                      if ( nums.length>0 ){                              if ( nums[0]==nums[nums.length-1] ){                                          return true;                              }else{                                         return false;                             }                    }                    else{                             return false;                    }           }

Java Bat : Array 1 : FirstLast6

In Array 1 section, these are simple Array based problems in which there is no use of loops to solve the problems.

First Last 6 Problem : Given an array of ints, return true if 6 appears as either the first or last element in the array. The array will be length 1 or more.

firstLast6({1, 2, 6}) → true
firstLast6({6, 1, 2, 3}) → true
firstLast6({3, 2, 1}) → false

In this problem an array of ints is passed to a method firstLast6 and if 6 appears as either the first or last element in the array the firstLast6 method will return true else it will return false.

To check weather first and last element is 6 or not.

nums[0]==6 || nums[nums.length-1]==6

So the Answer for this Java Bat Problem:

public boolean firstLast6( int[] nums ) {                                             if ( nums[0]==6 || nums[nums.length-1]==6 ){                                       return true;                         }                         else{                                      return false;                         }           }

JAVA BAT : Array 1 Problems

In Array 1 section, these are simple Array based problems in which there is no use of loops to solve the problems. To solve these problems we should use simple array methods for example:

arr[0], arr[1].......a[n] to access the elements of array.
arr.length to get the number of elements in array.
int[] arr = int[n] to initialize array of n integers (n is length for array)
int[] num = {1,2,3,4};  to initialize array in which element of array will be 1,2,3 and 4

Array 1 Problems:

firstLast6	sameFirstLast	makePi
commonEnd	sum3	rotateLeft3
reverse3	maxEnd3	sum2
middleWay	makeEnds	has23
no23	makeLast	double23
fix23	start1	biggerTwo
makeMiddle	plusTwo	swapEnds
midThree	maxTriple	frontPiece
unlucky1	make2	front11