Array implementation of a queue using unshift and pop

app.js

// QUEUE = First In First Out

const queue = [];

queue.unshift("Resume.docx");
console.log(queue);
//[ 'Resume.docx' ]

queue.unshift("Data_Report.csv");
console.log(queue);
//[ "Data_Report.csv", "Resume.docx" ]

queue.unshift("Picture_of_Biscuit.png");
console.log(queue);
//["Picture_of_Biscuit.png", "Data_Report.csv", "Resume.docx"]

let firstOut = queue.pop();
//"Resume.docx"
console.log(queue);
//["Picture_of_Biscuit.png", "Data_Report.csv"]

firstOut = queue.pop();
//"Data_report.csv"
console.log(queue);
//["Picture_of_Biscuit.png"];