Text Processing with JavaScript

Recipe 60

Removing Duplicate Lines Separated by Other Lines

Task

Suppose you want to eliminate duplicated lines that are not adjacent to each other like in the previous recipe. For instance, let’s say you have text like this:

Team Power Rankings
#1  Cleveland Cavaliers 45-28
#2  Philadelphia 76ers 48-22
#1  Cleveland Cavaliers 45-28
#3  Memphis Grizzlies 43-27
#2  Philadelphia 76ers 48-22
#4  Boston Celtics 49-23

And you need to write a code that outputs:

Team Power Rankings
#1  Cleveland Cavaliers 45-28
#2  Philadelphia 76ers 48-22
#3  Memphis Grizzlies 43-27
#4  Boston Celtics 49-23

Your code should have the capability to remove duplicate entries, even if they are interspersed with other lines.

Solution

Convert the string to an array, then ...