orignla array:
Array ( [1] => twentieth-century-essays [2] => social-problems-essays [3] => federal-government-essays [4] => justice-essays [5] => courts-essays [6] => law-essays [7] => politics-essays [8] => society-essays [9] => economy-essays [10] => constitution-essays [11] => authority-essays [12] => boat-essays [13] => wisdom-essays [14] => activism-essays [15] => mcgraw-hill-essays [16] => police-essays )
remove array:Array ( [1] => twentieth-century-essays [2] => social-problems-essays [3] => federal-government-essays [4] => justice-essays [5] => courts-essays [6] => law-essays [7] => politics-essays [8] => society-essays [9] => economy-essays [10] => constitution-essays [11] => authority-essays [12] => boat-essays [13] => wisdom-essays [14] => activism-essays [15] => mcgraw-hill-essays [16] => police-essays )