Javascript: Use the best Javascript library to merge 4 json files

Job ID: 30977916

Budget: $15 – $25 USD

INSTRUCTIONS:

Download attached 5 files.
There are 4 input files: file1.txt, file2.txt, file3.txt, file4.txt
And 1 sample-output.txt file.

I want you to use the best Javascript library - that will MERGE all 4 json files and OUTPUT exactly like sample-output.txt
Related categories: JavaScript HTML5 HTML jQuery / Prototype